Radio wave radiation system, radio wave radiation device

Abstract

Provided are a radio wave radiation system and a radio wave radiation device that can reduce interference between inputted / outputted signals. A radio wave radiation system (1) comprises a radio wave radiation device (11) and one or more expansion radiation devices (12). At a first casing (210) of the radio wave radiation device (11), a first radio wave radiation part (51) that can radiate first radio waves on the basis of a first high-frequency signal from among a plurality of high-frequency signals is provided to have a different orientation from one or a plurality of first communication terminals (811, 812) or one or more second output terminals (611) that respectively output one or more second high-frequency signals from among the plurality of high-frequency signals. At a second casing (220) of the expansion radiation devices (12), one or a plurality of second communication terminals (821, 822) or a second input part (72) that is connected to a second output terminal (611) via a coaxial cable (C1) is provided to have a different orientation from a second radio wave radiation part (52) that can radiate second radio waves on the basis of a second high-frequency signal that is inputted to the second input part (72).

Description

Radio wave emission system, radio wave emission device

[0001] The present disclosure relates to a radio wave emitting system and a radio wave emitting device.

[0002] Patent Literature 1 discloses an RF power amplifier. The RF power amplifier disclosed in Patent Literature 1 comprises a controller, a driver, a splitter, a final stage, and a combiner, which are coupled to function as an RF power amplifier. One or more of these components are disposed on one or more motherboards, e.g., printed circuit boards. A heat sink defines the base of the RF power amplifier, and in some embodiments, at least two grooves are formed therein, and electrical components of the splitter and the controller fit into the one or more grooves, thereby substantially disposing these components within the heat sink. In some embodiments, a power rail is also provided, which is also substantially disposed within the heat sink. The power rail grooves in the heat sink and the final stage carrier provide EMI shielding for the power rail.

[0003] U.S. Patent No. 9,007,125

[0004] The RF power amplifier described in Patent Document 1 includes a rear panel interface that includes three fans, a BNC connector, a sample RF connector, an AC input connector, an RF input connector, an output RF connector, a system I / O connector, a circuit breaker, an Ethernet connector, and an interface board.

[0005] In such a structure, there is a possibility that the radio wave input signal and the radio wave radiation signal may be coupled, or that the control signal may be superimposed on the radio wave input signal. To reduce this signal superimposition, the shielding structure inside the housing may need to be multiple or complex, which increases costs. In addition, because various signals are concentrated on the motherboard, there is also the problem of mutual interference between high-frequency signals, analog signals, etc.

[0006] The present disclosure provides a radio wave emitting system and a radio wave emitting device that can reduce radio wave interference with a simple structure.

[0007] A radio wave emission system according to one aspect of the present disclosure includes a radio wave emission device and one or more extended emission devices. The radio wave emission device includes a signal generating unit that generates a plurality of high-frequency signals, a first radio wave emitting unit that can radiate a first radio wave based on a first high-frequency signal among the plurality of high-frequency signals, an output unit having one or more output terminals connectable to a coaxial cable and that outputs one or more second high-frequency signals among the plurality of high-frequency signals from one or more second output terminals among the one or more output terminals, a first communication unit having one or more first communication terminals connectable to a communication cable, a first control unit that controls emission of the first radio waves in accordance with the first communication signal received through the first communication unit, and a first casing that accommodates at least a portion of the signal generating unit, the first radio wave emitting unit, the output unit, the first communication unit, and the first control unit. Each of the one or more extended radiation devices includes a second input unit connected to one of the one or more second output terminals via a coaxial cable and receiving one of the one or more second high-frequency signals, a second radio wave radiating unit configured to radiate a second radio wave based on the second high-frequency signal input to the second input unit, a second communication unit having one or more second communication terminals connectable to a communication cable, a second control unit configured to control radiation of the second radio wave in response to the second communication signal received through the second communication unit, and a second casing that accommodates the second input unit, the second radio wave radiating unit, the second communication unit, and the second control unit. In the first casing, the first radio wave radiating unit is arranged in a different orientation from the one or more output terminals and the one or more first communication terminals. In the second casing, the second radio wave radiating unit is arranged in a different orientation from the second input unit and the one or more second communication terminals.

[0008] According to one aspect of the present disclosure, a radio wave emission device is connectable to one or more extended radiation devices, and includes: a signal generating unit that generates a plurality of high-frequency signals; a first radio wave emitting unit that can emit a first radio wave based on a first high-frequency signal among the plurality of high-frequency signals; an output unit having one or more output terminals connectable to a coaxial cable and that outputs one or more second high-frequency signals among the plurality of high-frequency signals from one or more second output terminals among the one or more output terminals; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls emission of the first radio wave in response to a first communication signal received through the first communication unit; and a first casing that accommodates at least a portion of the signal generating unit, the first radio wave emitting unit, the output unit, the first communication unit, and the first control unit. Each of the one or more extended radiation devices includes: a second input unit connected to one of the one or more second output terminals via a coaxial cable and that receives one of the one or more second high-frequency signals; and a second radio wave emitting unit that can emit a second radio wave based on the second high-frequency signal input to the second input unit. In the first casing, the first radio wave radiating portion is arranged in a different orientation from the one or more output terminals and the one or more first communication terminals.

[0009] A radio wave emission system according to one aspect of the present disclosure includes a radio wave emission device and one or more extended emission devices, wherein the radio wave emission device includes a signal generating unit that generates a plurality of high-frequency signals, a first radio wave emission unit that can emit a first radio wave based on a first high-frequency signal among the plurality of high-frequency signals, an output unit having one or more output terminals connectable to a coaxial cable and outputting one or more second high-frequency signals among the plurality of high-frequency signals from one or more second output terminals among the one or more output terminals, a first communication unit having one or more first communication terminals connectable to a communication cable, a first control unit that controls emission of the first radio wave in accordance with a first communication signal received through the first communication unit, and a first abnormality detection unit that detects a first index value of an abnormality in the radio wave emission device, Each of the radiation devices includes a second input unit connected to one of the one or more second output terminals via a coaxial cable and receiving one of the one or more second high-frequency signals; a second radio wave radiation unit that enables radiation of a second radio wave based on the second high-frequency signal input to the second input unit; a second communication unit having one or more second communication terminals that can be connected to a communication cable; a second control unit that controls radiation of the second radio wave in accordance with the second communication signal received through the second communication unit; and a second abnormality detection unit that detects a second index value of an abnormality in the extended radiation device, wherein when the first index value detected by the first abnormality detection unit exceeds a first threshold, the first control unit transmits a first abnormality signal through the first communication unit, and at least one of the second control units that receives the first abnormality signal stops or reduces radio wave radiation. When the second index value detected by the second abnormality detection unit exceeds the second threshold, the second control unit transmits a second abnormality signal through the second communication unit, and at least one of the first control unit of the radio wave emission device that received the second abnormality signal and the second control unit of one or more extended radiation devices that received the second abnormality signal among the one or more extended radiation devices stops or reduces radio wave emission.

[0010] Aspects of the present disclosure enable reduction of radio wave interference with a simple structure.

[0011] Schematic diagram of a radio wave radiation system according to a first embodiment. Schematic circuit diagram of a radio wave radiation device of the radio wave radiation system according to the first embodiment. Perspective view of the radio wave radiation device of the radio wave radiation system according to the first embodiment. Schematic diagram of the internal configuration of the radio wave radiation device of the radio wave radiation system according to the first embodiment. Schematic circuit diagram of an extended radiation device of the radio wave radiation system according to the first embodiment. Perspective view of the extended radiation device of the radio wave radiation system according to the first embodiment. Schematic diagram of the internal configuration of the extended radiation device of the radio wave radiation system according to the first embodiment. Schematic circuit diagram of a first example of a radio wave emitting device of the radio wave emitting system according to the third embodiment; Schematic circuit diagram of a second ... fourth embodiment; Schematic circuit diagram of a first example of a radio wave emitting device of the radio wave emitting system according to the fourth embodiment; Schematic circuit diagram of a second example of a radio wave emitting device of the radio wave emitting system according to the fourth embodiment; Schematic circuit diagram of a third example of a radio wave emitting device of the radio wave emitting system according to the fourth embodiment; Schematic circuit diagram of a fourth example of a radio wave emitting device of the radio wave emitting system according to the fourth embodiment; Schematic circuit diagram of an extended radiation device of the radio wave emitting system according to the fourth embodiment; Schematic circuit diagram of a synchronization signal connection method of the radio wave emitting system according to the fifth embodiment;

[0012] [1. Embodiments] Hereinafter, embodiments of the present disclosure will be described, with reference to the drawings where appropriate. However, the following embodiments are merely examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following content (e.g., the shape, dimensions, and arrangement of each component). Positional relationships, such as up, down, left, and right, are based on the positional relationships shown in the drawings unless otherwise specified. Each figure described in the following embodiments is a schematic diagram, and the ratios of the size and thickness of each component in each figure do not necessarily reflect the actual dimensional ratios. Furthermore, the dimensional ratios of each element are not limited to the ratios shown in the drawings.

[0013] In the following description, when it is necessary to distinguish between multiple components, prefixes such as "first" and "second" are added to the names of the components. However, when the components can be distinguished from each other by the symbols attached to them, the prefixes such as "first" and "second" may be omitted in consideration of readability of the text.

[0014] In the following description, when it is necessary to distinguish between multiple components, suffixes such as "-1" and "-2" are added to the symbols of the components. However, when it is not necessary to distinguish between multiple components, the suffixes "-1" and "-2" may be omitted to improve readability.

[0015] [1.1 First Embodiment] [1.1.1 Configuration] FIG. 1 is a schematic diagram of a radio wave emission system 1 according to a first embodiment. The radio wave emission system 1 is used to emit radio waves of a desired output power to an emission target. The radio wave emission system 1 includes a radio wave emission device 11 and one or more extended radiation devices 12 (12-1 to 12-7). Seven extended radiation devices 12-1 to 12-7 are illustrated in FIG. 1. In the radio wave emission system 1, the radio wave emission device 11 and the extended radiation device 12 have a function of enabling radio wave emission. As an example, the radio wave emission device 11 and the extended radiation device 12 can emit radio waves with an output power of 250 W. In the radio wave emission system 1, the maximum output power of radio waves that can be emitted from the radio wave emission system 1 can be changed by changing the number of extended radiation devices 12. If there are seven extended radiation devices 12, the maximum output of radio waves is 250 W × (1 + 7) = 2 kW, and if there is one extended radiation device 12, the maximum output of radio waves is 250 W × (1 + 1) = 500 W. In the radio wave radiation system 1, the radio wave radiation device 11 is a master-type radio wave radiation device that can emit radio waves independently, and the extended radiation device 12 is a slave-type radio wave radiation device that cannot emit radio waves without the master-type radio wave radiation device. When there is no need to distinguish between the radio wave radiation device 11 and the extended radiation device 12, they may be simply referred to as "radiation devices."

[0016] First, a description will be given of the radio wave emitting device 11. Fig. 2 is a schematic circuit diagram of the radio wave emitting device 11 according to one embodiment.

[0017] The radio wave emitting device 11 includes a signal generating unit 2, a first adjusting unit 31, a first signal amplifying unit 41, a first radio wave emitting unit 51, an output unit 61, a first input unit 71, a first communication unit 81, a first control unit 91, a first power supply input unit 101, and a first high-frequency filter 111. The radio wave emitting device 11 further includes a non-reciprocal circuit 121, a terminator 131, couplers 1411 and 1412, a detection circuit 151, and temperature sensors 1611 and 1612.

[0018] The signal generating unit 2 generates, for example, a high-frequency signal for generating radio waves to be radiated to an object of radiation. The frequency of the high-frequency signal is set appropriately depending on the application of the radio wave radiation system 1. Applications of the radio wave radiation system 1 include consumer applications, industrial applications, medical applications, scientific applications, etc. When the radio wave radiation system 1 is used for consumer applications, particularly for heaters such as microwave ovens, the frequency of the high-frequency signal may be, for example, 1 MHz to 10 GHz. By radiating radio waves to a dielectric using a high-frequency signal of such a frequency, dielectric loss occurs inside the dielectric, and heat is generated in the dielectric. This allows the dielectric to be heated.

[0019] The signal generating section 2 generates a plurality of high frequency signals having the same frequency band and phase. In this embodiment, the signal generating section 2 is configured to be able to generate a maximum of eight high frequency signals.

[0020] The signal generating unit 2 includes an oscillator circuit 21, a power adjusting unit 22, an amplifier unit 23, and a distributor 24. The signal generating unit 2 may be configured, for example, with an FPGA (Field-Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), or the like.

[0021] The oscillator circuit 21 generates a reference high-frequency signal. For example, the oscillator circuit 21 converts a commercial AC voltage into a DC voltage and generates the reference high-frequency signal by voltage control using a semiconductor supplied with the DC voltage. The oscillator circuit 21 may also be equipped with a frequency synthesizer that generates a reference clock using a quartz oscillator or a ceramic oscillator, thereby generating the reference high-frequency signal.

[0022] The power adjustment unit 22 is used, for example, to adjust the power of the high-frequency signal from the oscillation circuit 21. The power adjustment unit 22 includes, for example, a digital attenuator such as a PWM attenuator, an analog attenuator, or a variable amplifier.

[0023] The divider 24 outputs multiple high-frequency signals by equally dividing the reference high-frequency signal. That is, the frequency bands of the multiple high-frequency signals are equal to the frequency band of the reference high-frequency signal. The multiple high-frequency signals may have the same frequency band and phase. In this embodiment, the divider 24 is configured to be able to output a maximum of eight high-frequency signals. One of the eight high-frequency signals is used as a first high-frequency signal, and the remaining seven are used as second high-frequency signals. The number of second high-frequency signals is set according to the number of extended radiating devices 12.

[0024] The first adjustment unit 31 adjusts at least one of the phase and power of a first high-frequency signal among the multiple high-frequency signals. The phase of the first high-frequency signal serves as a reference for the phase of the second high-frequency signal. Hereinafter, the phase of the first high-frequency signal will be referred to as a reference phase. The first adjustment unit 31 includes, for example, a variable amplifier 311 and a fixed amplifier 312. In this embodiment, the first adjustment unit 31 is configured to be able to adjust the power of the first high-frequency signal.

[0025] The first signal amplifier 41 is a signal amplifier that amplifies the first high-frequency signal adjusted by the first adjustment unit 31. The first signal amplifier 41 may have one or more amplifiers. At least one of the one or more amplifiers may include a transistor. The transistor may be, for example, a field-effect transistor. The transistor may be, for example, a normally-on type. An amplifier including a transistor may be a common-source circuit in which the source terminal of the transistor is grounded, and such an amplifier outputs an amplified high-frequency signal from the drain terminal in response to a high-frequency signal input to the gate terminal of the transistor.

[0026] In this embodiment, the first signal amplification unit 41 includes a plurality of amplifiers 411, 412, and 413 connected in series to form a multistage amplifier. The multistage amplifier allows the first high-frequency signal to be amplified multiple times. For example, the driver stage (input stage) amplifiers 411 and 412 may amplify 0.1 mW to 10 W, and the final stage (output stage) amplifier 413 may amplify 10 W to 250 W. The multistage amplifier can distribute heat generation locations and reduce heat density, allowing heat to be dissipated with a simple cooling structure. Thus, in this embodiment, the first signal amplification unit 41 forms a high-power amplifier (HPA).

[0027] The first radio wave radiating unit 51 is capable of radiating a first radio wave based on the first high-frequency signal amplified by the first signal amplifier 41. The first radio wave radiating unit 51 may be, for example, an antenna terminal to which an antenna cable connected to an antenna that radiates radio waves can be connected, or a coaxial connector to which a coaxial cable can be connected.

[0028] The output unit 61 outputs a high-frequency signal from the radio wave emission device 11 to the outside. The output unit 61 has a plurality of output terminals 611. Each output terminal 611 is connectable to a coaxial cable. The output terminals 611 of the output unit 61 are connected to the plurality of output terminals of the distributor 24, respectively. One of the output terminals 611 is used as a first output terminal that outputs a first high-frequency signal. The remaining output terminals 611 are used as second output terminals that output second high-frequency signals, respectively. In this manner, the output unit 61 outputs the first high-frequency signal from a first output terminal of the plurality of output terminals 611. The output unit 61 outputs one or more second high-frequency signals from one or more second output terminals of the plurality of output terminals 611, respectively.

[0029] In this embodiment, seven extended radiating devices 12-1 to 12-7 can be connected to seven second output terminals 611 via coaxial cables C1-1 to C1-7, respectively.

[0030] The first input unit 71 can be connected to a coaxial cable. The first input unit 71 is connected to the first output terminal 611 of the output unit 61 via the coaxial cable C2. Therefore, a first high-frequency signal is input to the first input unit 71. The first input unit 71 is connected to the first adjustment unit 31, and inputs the received first high-frequency signal to the first adjustment unit 31.

[0031] In this way, multiple coaxial cables C1-1 to C1-7, C2 can be connected to the multiple output terminals 611 of the output unit 61. In the radio wave emission system 1, it is preferable that the phases of the radio waves emitted from the radio wave emission device 11 and the extended emission device 12 are synchronized and matched. The lengths of the coaxial cables C1, C2 can affect the phases of the radio waves. It is preferable that the lengths of the multiple coaxial cables C1, C2 connected to the multiple output terminals 611 of the output unit 61 are equal to each other.

[0032] The first communication unit 81 has one or more first communication terminals 811, 812 connectable to a communication cable. The first communication unit 81 enables communication with an external device using a first communication signal. The first communication signal includes first control information related to control of the radio wave emitting device 11. The first control information may include, for example, instructions for starting or stopping radio wave emission, the frequency of the radio wave, the output power level of the radio wave, and the phase of the radio wave. The types of first control information may include synchronous control, in which the radio wave emitting device 11 and one or more extended radiating devices 12 operate synchronously, and asynchronous control, in which the radio wave emitting device 11 and one or more extended radiating devices 12 operate independently. The first communication signal is, for example, a serial signal. In this embodiment, the first communication terminals 811, 812 include a third communication terminal 811 and a fourth communication terminal 812, which have different communication standards. In particular, in this embodiment, the third communication terminal 811 and the fourth communication terminal 812 have different communication distances. The third communication terminal 811 corresponds to, for example, UART (Universal Asynchronous Receiver / Transmitter) or SPI (Serial Peripheral Interface). The fourth communication terminal 812 corresponds to a serial communication standard such as RS485. Because RS485 is more resistant to noise than UART, the fourth communication terminal 812 enables communication over longer distances than the third communication terminal 811. The first communication unit 81 further includes a transceiver 813. The transceiver 813 is connected between the fourth communication terminal 812 and the first control unit 91. The transceiver 813 converts the communication standard between the fourth communication terminal 812 and the first control unit 91, for example. For example, the transceiver 813 converts between UART and RS485.

[0033] The first communication unit 81 includes a first synchronization terminal 814. The first synchronization terminal 814 is a terminal for a synchronization signal. The synchronization signal is a signal for synchronization between the radio wave emitting device 11 and one or more extended radiation devices 12. The synchronization signal is, for example, a single pulse or a pulse train rather than a serial signal. The radio wave emitting device 11 may perform operations based on the synchronization signal for synchronization with the one or more extended radiation devices 12.

[0034] The first power input unit 101 has one or more first power terminals 1011, 1012 that can be connected to a power cable. The first power input unit 101 is used to supply power to the radio wave emission device 11. In this embodiment, the first power terminals 1011, 1012 include a third power terminal 1011 and a fourth power terminal 1012 that have different rated voltages. The third power terminal 1011 corresponds to, for example, 50 V, and the fourth power terminal 1012 corresponds to, for example, 5 V. As an example, the third power terminal 1011 is used to supply power to the signal generating unit 2 and the first signal amplifying unit 41, and the fourth power terminal 1012 is used to supply power to the first control unit 91.

[0035] The first high-frequency filter 111 reduces high-frequency signals corresponding to the frequency bands of the first high-frequency signal and one or more second high-frequency signals. The first high-frequency filter 111 may include, for example, a low-pass filter, a band-elimination filter, a feed-through EMI filter, etc. In this embodiment, the first high-frequency filter 111 is connected to the third power supply terminal 1011. The first high-frequency filter 111 may be disposed adjacent to the third power supply terminal 1011.

[0036] The non-reciprocal circuit 121 is located between the first signal amplifier 41 and the first radio wave emitting unit 51. The non-reciprocal circuit 121 separates the traveling wave from the reflected wave. In this embodiment, the non-reciprocal circuit 121 transmits the traveling wave to the first radio wave emitting unit 51. The non-reciprocal circuit 121 transmits the reflected wave to the terminator 131. The non-reciprocal circuit 121 is, for example, a circulator. In this embodiment, the traveling wave is the first high-frequency signal amplified by the first signal amplifier 41. In other words, the traveling wave is the high-frequency signal supplied to the first radio wave emitting unit 51. In this embodiment, the reflected wave is a signal flowing backward from the first radio wave emitting unit 51.

[0037] The terminator 131 includes a terminating resistor. The terminator 131 dissipates the reflected wave separated by the non-reciprocal circuit 121 as heat.

[0038] The coupler 1411 detects the traveling wave and is located between the first signal amplifier 41 and the non-reciprocal circuit 121. The coupler 1411 is, for example, a directional coupler.

[0039] The coupler 1412 detects the reflected wave and is located between the non-reciprocal circuit 121 and the terminator 131. The coupler 1412 is, for example, a directional coupler.

[0040] The detection circuit 151 measures the power of the forward wave and the power of the reflected wave. In this embodiment, the detection circuit 151 receives a portion of the forward wave from the coupler 1411 and outputs a forward wave power measurement signal indicating the power of the forward wave to the first control unit 91. The detection circuit 151 receives a portion of the reflected wave from the coupler 1412 and outputs a reflected wave power measurement signal indicating the power of the reflected wave to the first control unit 91.

[0041] The temperature sensor 1611 measures the temperature of the first signal amplifier 41. The temperature sensor 1611 outputs a first temperature measurement signal indicating the temperature of the first signal amplifier 41 to the first control unit 91.

[0042] The temperature sensor 1612 measures the temperature of the terminator 131 and outputs a second temperature measurement signal indicating the temperature of the terminator 131 to the first control unit 91.

[0043] The first control unit 91 controls the emission of the first radio wave from the first radio wave emitting unit 51 in accordance with the first communication signal received via the first communication unit 81. In controlling the emission of the first radio wave, the first control unit 91 controls the signal generating unit 2, the first adjustment unit 31, and the first signal amplifying unit 41.

[0044] The first control unit 91 controls the power adjustment unit 22 of the signal generation unit 2. In the radio wave emission system 1, the maximum output of radio waves can be adjusted depending on the number of extended emission devices 12. Here, the number of second high-frequency signals is determined according to the number of extended emission devices 12. For the same power of the reference high-frequency signal, the power of each high-frequency signal decreases as the number of distributed high-frequency signals (particularly the number of second high-frequency signals) increases. Therefore, the first control unit 91 adjusts the power of the reference high-frequency signal based on the number of multiple high-frequency signals so that each of the multiple high-frequency signals has a predetermined power. The predetermined power is, for example, 0.1 mW. Assuming there is no power loss in the distributor 24, if the number of second high-frequency signals is 1, the power of the reference high-frequency signal is set to 0.1 mW × (1 + 1) = 0.2 mW. If the number of second high-frequency signals is 7, the power of the reference high-frequency signal is set to 0.1 mW × (1 + 7) = 0.8 mW.

[0045] The first control unit 91 adjusts the power of the first high-frequency signal using the variable amplifier 311 of the first adjustment unit 31. For example, the first control unit 91 feedback-controls the first adjustment unit 31 (variable amplifier 311) so that the power of the first high-frequency signal becomes power corresponding to the target value of output power indicated by the first communication signal received by the first communication unit 81. For this feedback control, a forward wave power measurement signal from the detection circuit 151 is used.

[0046] The first control unit 91 performs operations based on the synchronization signal. Specifically, the first control unit 91 controls the emission of the first radio wave from the first radio wave emitting unit 51 based on the synchronization signal. In the present embodiment, the first control unit 91 outputs the synchronization signal from the first synchronization terminal 814. Preferably, the first control unit 91 may output the synchronization signal from the first synchronization terminal 814 at regular intervals or upon receiving the first communication signal. This allows the synchronization between the radio wave emitting device 11 and the one or more extended radiation devices 12 to be maintained even after the radio wave emitting device 11 and the one or more extended radiation devices 12 start operating in synchronization with each other. In particular, the synchronization between the radio wave emitting device 11 and the one or more extended radiation devices 12 can be maintained even if the operation of the radio wave emitting device 11 and / or the one or more extended radiation devices 12 is changed.

[0047] The first control unit 91 executes a protection operation as necessary. For example, when the first control unit 91 determines that an abnormality has occurred in the radio wave emission device 11 based on the reflected wave power measurement signal from the detection circuit 151, the first temperature measurement signal from the temperature sensor 1611, and the second temperature measurement signal from the temperature sensor 1612, the first control unit 91 can stop or reduce the emission of the first radio wave.

[0048] More specifically, the detection circuit 151 and the temperature sensors 1611 and 1612 are used as a first abnormality detection unit that detects a first index value of an abnormality in the radio wave emission device 11. That is, the first abnormality detection unit may include the detection circuit 151 that measures the power of the reflected wave of the first radio wave as the first index value. The first abnormality detection unit may include temperature sensors 1611 and 1612 that measure the temperature of the radio wave emission device 11 as the first index value. The temperature sensor 1612 may measure the temperature of the terminator 131. When the first index value detected by the first abnormality detection unit exceeds a first threshold, the first control unit 91 stops or reduces radio wave emission (emission of the first radio wave). Note that the first threshold when the first index value is the power of the reflected wave and the first threshold when the first index value is the temperature may be set appropriately taking into account the abnormal state of the radio wave emission device 11.

[0049] The first control unit 91 may be configured, for example, by a microcontroller having one or more microprocessors and a memory. The first control unit 91 may be configured, for example, by a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC).

[0050] 3 is a perspective view of the radio wave emitting device 11. The radio wave emitting device 11 includes a first casing 210.

[0051] The first casing 210 houses the circuit elements of the radio wave emitting device 11. The circuit elements of the radio wave emitting device 11 include a signal generating unit 2, a first adjusting unit 31, a first signal amplifying unit 41, a first radio wave emitting unit 51, an output unit 61, a first input unit 71, a first communication unit 81, a first control unit 91, a first power supply input unit 101, a first high-frequency filter 111, a non-reciprocal circuit 121, a terminator 131, couplers 1411 and 1412, a detection circuit 151, and temperature sensors 1611 and 1612.

[0052] The first casing 210 is in the shape of a rectangular parallelepiped, particularly a thin rectangular box, and is made of, for example, a metal material, particularly a metal material with good thermal conductivity.

[0053] The first casing 210 has a first top wall 211, a first bottom wall 212, and a first side wall 213. The first top wall 211 and the first bottom wall 212 define both thickness-wise surfaces of the first casing 210. The first top wall 211 and the first bottom wall 212 are rectangular. The first side wall 213 defines a surface perpendicular to the thickness direction of the first casing 210 and connects the first top wall 211 and the first bottom wall 212. In this embodiment, the first side wall 213 includes a first wall portion 213a, a second wall portion 213b, a third wall portion 213c, and a fourth wall portion 213d. The first wall portion 213a and the second wall portion 213b are on opposite sides in the first direction. The third wall portion 213c and the fourth wall portion 213d are on opposite sides in a second direction intersecting the first direction. The first direction and the second direction are both perpendicular to the thickness direction of the first casing 210. In this embodiment, the first direction and the second direction are perpendicular to each other.

[0054] The first radio wave emitting portion 51 is disposed on the first wall portion 213a.

[0055] The second wall portion 213b is provided with a fourth communication terminal 812 of the first communication unit 81 and the first input unit 71. The fourth communication terminal 812 is located on the second wall portion 213b closer to the fourth wall portion 213d than the third wall portion 213c. The first input unit 71 is located on the second wall portion 213b closer to the third wall portion 213c than the fourth wall portion 213d.

[0056] The third wall portion 213c is provided with a plurality of output terminals 611. The plurality of output terminals 611 are arranged in a line in the first direction on the third wall portion 213c.

[0057] The third communication terminal 811 and first power supply terminals (third and fourth power supply terminals) 1011, 1012 of the first communication unit 81 are arranged on the fourth wall portion 213d. The third power supply terminal 1011 is located closer to the first wall portion 213a than the second wall portion 213b on the fourth wall portion 213d. The fourth power supply terminal 1012 is located closer to the second wall portion 213b than the first wall portion 213a on the fourth wall portion 213d. The third communication terminal 811 is located in the center of the fourth wall portion 213d. In this embodiment, the third communication terminal 811 is located between the third power supply terminal 1011 and the fourth power supply terminal 1012 on the fourth wall portion 213d.

[0058] As described above, in the radio wave emission device 11, the first radio wave emission section 51 is arranged in the first casing 210 in a different orientation from the multiple output terminals 611 and the multiple first communication terminals (third and fourth communication terminals) 811, 812. This makes it possible to reduce radio wave interference between the first radio wave emission section 51 and the multiple output terminals 611 and the multiple first communication terminals (third and fourth communication terminals) 811, 812. Therefore, it is possible to reduce radio wave interference with a simple structure.

[0059] In the radio wave emission device 11, the multiple output terminals 611 and the multiple first communication terminals 811, 812 are arranged in different orientations in the first casing 210. This makes it possible to reduce radio wave interference between the multiple output terminals 611 and the multiple first communication terminals 811, 812. This makes it possible to reduce radio wave interference with a simple structure.

[0060] In this embodiment, the multiple first communication terminals 811, 812 include a third communication terminal 811 and a fourth communication terminal 812 that have different communication standards. In the first casing 210, the third communication terminal 811 and the fourth communication terminal 812 are arranged in different orientations. This makes it possible to reduce radio wave interference between the third communication terminal 811 and the fourth communication terminal 812. Therefore, it is possible to reduce radio wave interference with a simple structure.

[0061] In the radio wave emitting device 11, the multiple first power supply terminals 1011, 1012 are arranged in the first casing 210 in a direction different from that of at least one of the first radio wave emitting portion 51 or the multiple output terminals 611. This makes it possible to reduce radio wave interference between the multiple first power supply terminals 1011, 1012 and at least one of the first radio wave emitting portion 51 or the multiple output terminals 611. In particular, in this embodiment, the multiple first power supply terminals 1011, 1012 are arranged in a direction different from that of both the first radio wave emitting portion 51 and the multiple output terminals 611. This makes it possible to reduce radio wave interference between the multiple first power supply terminals 1011, 1012 and both the first radio wave emitting portion 51 and the multiple output terminals 611. Furthermore, the first high-frequency filter 111 connected to the first power supply terminal 1011 is arranged adjacent to the first power supply terminal 1011.

[0062] 4 is a schematic diagram of the internal configuration of the radio wave emitting device 11. More specifically, FIG. 4 shows the arrangement of circuit elements of the radio wave emitting device 11 within the first casing 210.

[0063] The areas inside the first casing 210 include analog circuit areas R111, R112, R113, and R114, digital circuit areas R121 and R122, power supply circuit areas R131 and R132, and a wiring area R14.

[0064] The analog circuit regions R111, R112, R113, and R114 are used for arranging the analog circuit, which includes the signal generating unit 2, the first adjusting unit 31, the first signal amplifying unit 41, the first radio wave emitting unit 51, the output unit 61, the first input unit 71, the non-reciprocal circuit 121, the terminator 131, the couplers 1411 and 1412, the detection circuit 151, and the temperature sensors 1611 and 1612.

[0065] The analog circuit region R111 is located in the center of the first casing 210. A first shield 214 is disposed between the analog circuit region R111 and the fourth wall portion 213d. A second shield 215 is disposed between the analog circuit region R111 and the third wall portion 213c. A fifth shield 216 is disposed between the analog circuit region R111 and the second wall portion 213b. The analog circuit region R111 is surrounded by the first wall portion 213a and the first, second, and fifth shields 214 to 216. The analog circuit region R111 may include a first signal amplifier 41, a first radio wave emitter 51, a non-reciprocal circuit 121, couplers 1411 and 1412, a detection circuit 151, and temperature sensors 1611 and 1612.

[0066] The analog circuit region R112 is located between the third wall portion 213c and the analog circuit region R111 inside the first casing 210. The signal generating unit 2 and the first adjusting unit 31 can be disposed in the analog circuit region R112.

[0067] The analog circuit region R113 is located between the third wall portion 213c and the analog circuit region R112 in the first casing 210. The output section 61 and the first input section 71 can be arranged in the analog circuit region R113.

[0068] The analog circuit region R114 is surrounded by the first wall portion 213a and the analog circuit regions R111, R112, and R113 within the first casing 210. A terminator 131 is disposed in the analog circuit region R114. The terminator 131 may be directly mounted on the inner surface side of the first bottom wall 212 of the first casing 210.

[0069] The digital circuit regions R121 and R122 are used for arranging digital circuits. The analog circuit includes a first communication unit 81 and a first control unit 91.

[0070] The digital circuit regions R121 and R122 are located between the fourth wall portion 213d and the analog circuit region R111 within the first casing 210. In this embodiment, the digital circuit regions R121 and R122 are located between the fourth wall portion 213d and the first shield 214 within the first casing 210. The digital circuit region R121 is located closer to the first wall portion 213a than the digital circuit region R122. The first control unit 91 and the third communication terminal 811 of the first communication unit 81 may be arranged in the digital circuit region R121. The fourth communication terminal 812 and the transceiver 813 of the first communication unit 81 may be arranged in the digital circuit region R122.

[0071] The power supply circuit regions R131 and R132 are used for arranging the power supply circuit. The power supply circuit includes a first power supply input unit 101 and a first high-frequency filter 111.

[0072] The power supply circuit regions R131 and R132 are located between the fourth wall 213d and the analog circuit region R111 within the first casing 210. In this embodiment, the power supply circuit regions R131 and R132 are located between the fourth wall 213d and the first shield 214 within the first casing 210. The power supply circuit region R131 is located closer to the first wall 213a than the power supply circuit region R132. In this embodiment, the power supply circuit region R131 is located between the first wall 213a and the digital circuit region R121. The power supply circuit region R132 is located between the digital circuit regions R121 and R122. The third power supply terminal 1011 and the first high-frequency filter 111 of the first power supply input unit 101 may be arranged in the power supply circuit region R131. The fourth power supply terminal 1012 of the first power supply input unit 101 may be arranged in the power supply circuit region R132.

[0073] The wiring region R14 is used for arranging power lines or control lines. The power lines are, for example, lines that supply power from the first power input unit 101 to the analog circuit. The control lines are, for example, lines that transmit control signals from the first control unit 91 to the analog circuit. The wiring region R14 is located on the second wall portion 213b side within the first casing 210. In particular, the wiring region R14 is located between the fifth shield 216 and the second wall portion 213b within the first casing 210. Furthermore, the wiring region R14 is located between the analog circuit region R113 and the digital circuit region R122.

[0074] As described above, in the radio wave emission device 11, within the first casing 210, the first control unit 91 and the first communication unit 81 are located on the fourth wall 213d side, the output unit 61 is located on the third wall 213c side, and the first radio wave emission unit 51 is located between the first control unit 91 and the first communication unit 81 and the output unit 61 in the second direction. This allows digital circuits such as the first control unit 91 and the first communication unit 81 to be separated from analog circuits such as the first radio wave emission unit 51 and the output unit 61. This reduces the possibility that the digital circuits will be affected by analog circuits that require more power than the digital circuits. Furthermore, the shielding structure within the first casing 210 can be simplified.

[0075] In the radio wave emission device 11, a first shield 214 is arranged in the first casing 210 at least partially between the first control unit 91 and the first communication unit 81 and the first radio wave emission unit 51. A second shield 215 is arranged in the first casing 210 at least partially between the output unit 61 and the first radio wave emission unit 51. This reduces the effects of high frequency leakage from the first radio wave emission unit 51 on the first control unit 91, the first communication unit 81, and the output unit 61.

[0076] In the radio wave emission device 11, the first adjustment unit 31 and the first signal amplification unit 41, together with the first radio wave emission unit 51, are located in the second direction between the first control unit 91 and the first communication unit 81 and the output unit 61. This allows the first radio wave emission unit 51, the first adjustment unit 31, and the first signal amplification unit 41, which have high power, to be arranged together.

[0077] Next, a description will be given of the extended radiating device 12. Fig. 5 is a schematic circuit diagram of the extended radiating device 12 according to one embodiment.

[0078] The extended radiation device 12 includes a second adjustment unit 32, a second signal amplification unit 42, a second radio wave radiation unit 52, a second input unit 72, a second communication unit 82, a second control unit 92, a second power supply input unit 102, and a second high-frequency filter 112. The extended radiation device 12 further includes a non-reciprocal circuit 122, a terminator 132, couplers 1421 and 1422, a detection circuit 152, and temperature sensors 1621 and 1622.

[0079] The second input unit 72 is connectable to a coaxial cable. The second input unit 72 is connected to one of the second output terminals 611 of the output unit 61 via the coaxial cable C1. Therefore, one of the second high-frequency signals is input to the second input unit 72. The second input unit 72 is connected to the second adjustment unit 32, and inputs the received second high-frequency signal to the second adjustment unit 32.

[0080] The second adjustment unit 32 adjusts at least one of the phase and power of a second high-frequency signal among the plurality of high-frequency signals. In the present embodiment, the second adjustment unit 32 includes, for example, a variable amplifier 321 and a fixed amplifier 322. In the present embodiment, the second adjustment unit 32 is configured to be able to adjust the power of the second high-frequency signal.

[0081] The second signal amplifier 42 is a signal amplifier that amplifies the second high-frequency signal adjusted by the second adjustment unit 32. Similar to the first signal amplifier 41, the second signal amplifier 42 may include one or more amplifiers 421, 422, and 423. At least one of the one or more amplifiers may include a transistor. In the present embodiment, the second signal amplifier 42 constitutes a high power amplifier (HPA).

[0082] The second radio wave emitting unit 52 is capable of emitting a second radio wave based on the second high-frequency signal amplified by the second signal amplifier 42. The second radio wave emitting unit 52 may be, for example, an antenna terminal to which an antenna cable connected to an antenna that radiates radio waves can be connected, or a coaxial connector to which a coaxial cable can be connected.

[0083] The second communication unit 82 has one or more second communication terminals 821, 822 connectable to a communication cable. The second communication unit 82 enables communication with an external device using a second communication signal. The second communication signal includes second control information related to control of the extended radiating device 12. The second control information may include, for example, instructions for starting or stopping radio wave radiation, the radio wave frequency, the radio wave output power level, and the radio wave phase. The second control information may include synchronous control, in which the radio wave radiating device 11 and one or more extended radiating devices 12 operate synchronously, and asynchronous control, in which the radio wave radiating device 11 and one or more extended radiating devices 12 operate independently. The second communication signal is, for example, a serial signal. In this embodiment, the second communication terminals 821, 822 include a fifth communication terminal 821 and a sixth communication terminal 822, which have different communication standards. In this embodiment, the fifth communication terminal 821 and the sixth communication terminal 822 have different communication distances. The fifth communication terminal 821 corresponds to, for example, UART or SPI. The fourth communication terminal 812 supports a serial communication standard such as RS485. The second communication unit 82 further includes a transceiver 823. The transceiver 823 is connected between the sixth communication terminal 822 and the second control unit 92. The transceiver 823 converts the communication standard between the sixth communication terminal 822 and the second control unit 92, for example. For example, the transceiver 823 converts between UART and RS485.

[0084] The second communication unit 82 includes a second synchronization terminal 824. The second synchronization terminal 824 is a terminal for a synchronization signal. In this embodiment, the second synchronization terminal 824 includes an input terminal 824a, an output terminal 824b, and a buffer amplifier 824c between the input terminal 824a and the output terminal 824b. The buffer amplifier 824c is arranged so that the synchronization signal input to the input terminal 824a is output from the output terminal 824b without change. The response characteristic of the buffer amplifier 824c is, for example, several nanoseconds or less. The synchronization signal is input from the input terminal 824a to the second control unit 92 and output from the output terminal 824b via the buffer amplifier 824c. The extended radiation device 12 may perform operations based on the synchronization signal for synchronization with the radio wave radiation device 11.

[0085] The second power input unit 102 has one or more second power terminals 1021, 1022 that can be connected to a power cable. The second power input unit 102 is used to supply power to the extended radiation device 12. In this embodiment, the second power terminals 1021, 1022 include a fifth power terminal 1021 and a sixth power terminal 1022 that have different rated voltages. The fifth power terminal 1021 corresponds to, for example, 50 V, and the sixth power terminal 1022 corresponds to, for example, 5 V. As an example, the fifth power terminal 1021 is used to supply power to the second signal amplifier unit 42, and the sixth power terminal 1022 is used to supply power to the second control unit 92.

[0086] The second high-frequency filter 112 reduces high-frequency signals corresponding to the frequency bands of the first high-frequency signal and one or more second high-frequency signals. The second high-frequency filter 112 may include, for example, a low-pass filter, a band-elimination filter, a feed-through EMI filter, etc. In this embodiment, the second high-frequency filter 112 is connected to the fifth power supply terminal 1021. The second high-frequency filter 112 may be disposed adjacent to the fifth power supply terminal 1021.

[0087] The non-reciprocal circuit 122, terminator 132, couplers 1421 and 1422, detection circuit 152, and temperature sensors 1621 and 1622 of the extended radiation device 12 are similar to the non-reciprocal circuit 121, terminator 131, couplers 1411 and 1412, detection circuit 151, and temperature sensors 1611 and 1612 of the radio wave radiation device 11, respectively, and therefore will not be described here.

[0088] The second control unit 92 controls the emission of the second radio wave from the second radio wave emitter 52 in accordance with the second communication signal received via the second communication unit 82. In controlling the emission of the second radio wave, the second control unit 92 controls the second adjustment unit 32 and the second signal amplifier 42.

[0089] The second control unit 92 adjusts the power of the second high-frequency signal using the variable amplifier 321 of the second adjustment unit 32. For example, the second control unit 92 feedback-controls the second adjustment unit 32 (variable amplifier 321) so that the power of the second high-frequency signal becomes power corresponding to the target value of output power indicated by the second communication signal received by the second communication unit 82. For this feedback control, the forward wave power measurement signal from the detection circuit 152 is used.

[0090] The second control unit 92 performs operations based on the synchronization signal received through the second synchronization terminal 824 of the second communication unit 82. Specifically, the second control unit 92 controls the emission of the second radio wave from the second radio wave emission unit 52 based on the synchronization signal.

[0091] The second control unit 92 executes a protection operation as necessary. For example, when the second control unit 92 determines that an abnormality has occurred in the extended radiation device 12 based on the reflected wave power measurement signal from the detection circuit 152, the first temperature measurement signal from the temperature sensor 1621, and the second temperature measurement signal from the temperature sensor 1622, the second control unit 92 can stop or reduce the radiation of the second radio waves.

[0092] More specifically, the detection circuit 152 and the temperature sensors 1621 and 1622 may be used as a second abnormality detection unit that detects a second index value of an abnormality in the extended radiation device 12. That is, the second abnormality detection unit may include the detection circuit 152 that measures the power of a reflected wave of the second radio wave as the second index value. The second abnormality detection unit may include temperature sensors 1621 and 1622 that measure the temperature of the extended radiation device 12 as the second index value. The temperature sensor 1622 may measure the temperature of the terminator 132. When the second index value detected by the second abnormality detection unit exceeds a second threshold, the second control unit 92 stops or reduces radio wave radiation (radiation of the second radio wave). Note that the second threshold when the second index value is the power of the reflected wave and the second threshold when the second index value is the temperature may be set appropriately taking into account the abnormal state of the extended radiation device 12.

[0093] The second control unit 92 may be configured, for example, by a microcontroller having one or more microprocessors and a memory, or may be configured, for example, by an FPGA, an ASIC, or the like.

[0094] 6 is a perspective view of the extended radiating device 12. The extended radiating device 12 includes a second casing 220.

[0095] The second casing 220 houses the circuit elements of the extended radiation device 12. The circuit elements of the extended radiation device 12 include a second adjustment unit 32, a second signal amplification unit 42, a second radio wave radiation unit 52, a second input unit 72, a second communication unit 82, a second control unit 92, a second power supply input unit 102, a second high-frequency filter 112, a non-reciprocal circuit 122, a terminator 132, couplers 1421 and 1422, a detection circuit 152, and temperature sensors 1621 and 1622.

[0096] The second casing 220 is in the shape of a rectangular parallelepiped, particularly a thin, flat rectangular box, and is made of, for example, a metal material, particularly a metal material with good thermal conductivity.

[0097] The second casing 220 has a second top wall 221, a second bottom wall 222, and a second side wall 223. The second top wall 221 and the second bottom wall 222 define both thickness-wise surfaces of the second casing 220. The second top wall 221 and the second bottom wall 222 are rectangular. The second side wall 223 defines a surface perpendicular to the thickness direction of the second casing 220 and connects the second top wall 221 and the second bottom wall 222. In this embodiment, the second side wall 223 includes a fifth wall portion 223a, a sixth wall portion 223b, a seventh wall portion 223c, and an eighth wall portion 223d. The fifth wall portion 223a and the sixth wall portion 223b are on opposite sides in the third direction. The seventh wall portion 223c and the eighth wall portion 223d are on opposite sides in a fourth direction intersecting the third direction. The third direction and the fourth direction are both perpendicular to the thickness direction of the second casing 220. In the present embodiment, the third direction and the fourth direction are perpendicular to each other.

[0098] The second radio wave emitting portion 52 is disposed on the fifth wall portion 223a.

[0099] A sixth communication terminal 822 of the second communication unit 82 is disposed on the sixth wall portion 223b. The sixth communication terminal 822 is located on the sixth wall portion 223b closer to the eighth wall portion 223d than the seventh wall portion 223c.

[0100] The seventh wall portion 223c is provided with the second input portion 72. The second input portion 72 is located on the seventh wall portion 223c closer to the sixth wall portion 223b than the fifth wall portion 223a.

[0101] A fifth communication terminal 821 and second power supply terminals (fifth and sixth power supply terminals) 1021, 1022 of the second communication unit 82 are arranged on the eighth wall portion 223d. The fifth power supply terminal 1021 is located closer to the fifth wall portion 223a than the sixth wall portion 223b on the eighth wall portion 223d. The sixth power supply terminal 1022 is located closer to the sixth wall portion 223b than the fifth wall portion 223a on the eighth wall portion 223d. The fifth communication terminal 821 is located in the center of the eighth wall portion 223d. In this embodiment, the fifth communication terminal 821 is located between the fifth power supply terminal 1021 and the sixth power supply terminal 1022 on the eighth wall portion 223d.

[0102] As described above, in the extended radiation device 12, the second radio wave radiation unit 52 is arranged in the second casing 220 in a different orientation from the second input unit 72 and the plurality of second communication terminals (fifth and sixth communication terminals) 821, 822. This makes it possible to reduce interference of radio waves between the second radio wave radiation unit 52 and the second input unit 72 and the plurality of second communication terminals (fifth and sixth communication terminals) 821, 822.

[0103] In the extended radiation device 12, the second input unit 72 and the plurality of second communication terminals 821, 822 are arranged in different orientations in the second casing 220. This makes it possible to reduce interference of radio waves between the second input unit 72 and the plurality of second communication terminals 821, 822.

[0104] In the present embodiment, the plurality of second communication terminals 821, 822 include a fifth communication terminal 821 and a sixth communication terminal 822 that have different communication standards. The fifth communication terminal 821 and the sixth communication terminal 822 are arranged in different orientations in the second casing 220. This makes it possible to reduce radio wave interference between the fifth communication terminal 821 and the sixth communication terminal 822.

[0105] In the extended radiation device 12, the multiple second power supply terminals 1021, 1022 are arranged in the second casing 220 in a direction different from that of at least one of the second radio wave emitting portion 52 or the second input portion 72. This makes it possible to reduce radio wave interference between the multiple second power supply terminals 1021, 1022 and at least one of the second radio wave emitting portion 52 or the second input portion 72. In particular, in the present embodiment, the multiple second power supply terminals 1021, 1022 are arranged in a direction different from that of both the second radio wave emitting portion 52 and the second input portion 72. This makes it possible to reduce radio wave interference between the multiple second power supply terminals 1021, 1022 and both the second radio wave emitting portion 52 or the second input portion 72. Furthermore, the second high-frequency filter 112 connected to the second power supply terminal 1021 is arranged adjacent to the second power supply terminal 1021.

[0106] 7 is a schematic diagram of the internal configuration of the extended radiating device 12. More specifically, FIG. 7 shows the arrangement of the circuit elements of the extended radiating device 12 within the second casing 220.

[0107] The area inside the second casing 220 includes analog circuit areas R211, R212, and R213, digital circuit areas R221 and R222, power supply circuit areas R231 and R232, and a wiring area R24.

[0108] The analog circuit regions R211, R212, and R213 are used for arranging the analog circuit, which includes the second adjustment unit 32, the second signal amplifier 42, the second radio wave emitter 52, the second input unit 72, the non-reciprocal circuit 122, the terminator 132, the couplers 1421 and 1422, the detection circuit 152, and the temperature sensors 1621 and 1622.

[0109] The analog circuit region R211 is located in the center of the second casing 220. A third shield 224 is disposed between the analog circuit region R211 and the eighth wall portion 223d. A fourth shield 225 is disposed between the analog circuit region R211 and the seventh wall portion 223c. A sixth shield 226 is disposed between the analog circuit region R211 and the sixth wall portion 223b. The analog circuit region R211 is surrounded by the fifth wall portion 223a and the third, fourth, and sixth shields 224 to 226. The analog circuit region R211 may include a second signal amplifier 42, a second radio wave emitter 52, a non-reciprocal circuit 122, couplers 1421 and 1422, a detection circuit 152, and temperature sensors 1621 and 1622.

[0110] The analog circuit region R212 is located between the seventh wall portion 223c and the analog circuit region R211 inside the second casing 220. The second input unit 72 and the second adjustment unit 32 can be arranged in the analog circuit region R212.

[0111] The analog circuit region R213 is surrounded by the fifth wall portion 223a, the seventh wall portion 223c, and the analog circuit regions R211 and R212 within the second casing 220. A terminator 132 is disposed in the analog circuit region R213. The terminator 132 may be directly mounted on the inner surface side of the second bottom wall 222 of the second casing 220.

[0112] The digital circuit regions R221 and R222 are used for arranging digital circuits. The analog circuit includes a second communication unit 82 and a second control unit 92.

[0113] The digital circuit regions R221 and R222 are located between the eighth wall 223d and the analog circuit region R211 within the second casing 220. In this embodiment, the digital circuit regions R221 and R222 are located between the eighth wall 223d and the third shield 224 within the second casing 220. The digital circuit region R221 is located closer to the fifth wall 223a than the digital circuit region R222. The second control unit 92 and the fifth communication terminal 821 of the second communication unit 82 may be arranged in the digital circuit region R221. The sixth communication terminal 822 and the transceiver 823 of the second communication unit 82 may be arranged in the digital circuit region R222.

[0114] The power supply circuit regions R231 and R232 are used for arranging the power supply circuit. The power supply circuit includes a second power supply input unit 102 and a second high-frequency filter 112.

[0115] The power supply circuit regions R231 and R232 are located between the eighth wall 223d and the analog circuit region R211 within the second casing 220. In this embodiment, the power supply circuit regions R231 and R232 are located between the eighth wall 223d and the third shield 224 within the second casing 220. The power supply circuit region R231 is located closer to the fifth wall 223a than the power supply circuit region R232. In this embodiment, the power supply circuit region R231 is located between the fifth wall 223a and the digital circuit region R221. The power supply circuit region R232 is located between the digital circuit regions R221 and R222. The fifth power supply terminal 1021 of the first power supply input unit 101 and the second high-frequency filter 112 may be arranged in the power supply circuit region R231. The sixth power supply terminal 1022 of the second power supply input unit 102 may be arranged in the power supply circuit region R232.

[0116] The wiring region R24 is used for arranging power lines or control lines. The power lines are, for example, lines that supply power from the second power input unit 102 to the analog circuit. The control lines are, for example, lines that transmit control signals from the second control unit 92 to the analog circuit. The wiring region R24 is located on the sixth wall portion 223b side within the second casing 220. In particular, the wiring region R24 is located between the fifth shield 216 and the sixth wall portion 223b within the second casing 220. Furthermore, the wiring region R24 is located between the seventh wall portion 223c and the digital circuit region R222.

[0117] As described above, in the extended radiation device 12, within the second casing 220, the second control unit 92 and the second communication unit 82 are located on the eighth wall 223d side, the second input unit 72 is located on the seventh wall 223c side, and the second radio wave radiation unit 52 is located between the second control unit 92 and the second communication unit 82 and the second input unit 72 in the second direction. This allows digital circuits such as the second control unit 92 and the second communication unit 82 to be separated from analog circuits such as the second radio wave radiation unit 52 and the second input unit 72, thereby reducing the possibility that the digital circuits will be affected by analog circuits that require more power than the digital circuits. Furthermore, the shielding structure within the second casing 220 can be simplified.

[0118] In the extended radiation device 12, a third shield 224 is disposed within the second casing 220 at least partially between the second control unit 92 and the second communication unit 82 and the second radio wave radiation unit 52. A fourth shield 225 is disposed within the second casing 220 at least partially between the second input unit 72 and the second radio wave radiation unit 52. This reduces the effects of high frequency leakage from the second radio wave radiation unit 52 on the second control unit 92, the second communication unit 82, and the second input unit 72.

[0119] In the extended radiation device 12, the second adjustment unit 32 and the second signal amplification unit 42, together with the second radio wave radiation unit 52, are located in the second direction between the second control unit 92 and the second communication unit 82 and the second input unit 72. This allows the second radio wave radiation unit 52, the second adjustment unit 32, and the second signal amplification unit 42, which have high power, to be arranged together.

[0120] The radio wave emission system 1 described above includes a radio wave emission device 11. The radio wave emission device 11 is capable of emitting a first radio wave. Because the radio wave emission device 11 alone can be used to perform pre-installation testing of the radio wave emission system 1, there is no need to use a separate radio wave emission device not used in the radio wave emission system 1 for the pre-test. This reduces implementation costs. By connecting a required number of extended radiation devices 12 to the second output terminal 611 of the output section 61 of the radio wave emission device 11, the required number of second radio waves can be combined with the first radio wave and emitted, allowing the output power to be increased as desired. The configuration of the radio wave emission system 1 (the number of extended radiation devices 12) can be easily changed depending on the required output power. This reduces implementation costs.

[0121] In the radio wave emission system 1, when the type of the first control information and the second control information is synchronous control, the radio wave emission device 11 and one or more extended radiation devices 12 operate synchronously. Here, when the radio wave emission device 11 operates synchronously with one or more extended radiation devices 12-1 to 12-7, even if the radio wave emission device 11 and one or more extended radiation devices 12-1 to 12-7 start operating at the same time, synchronization may be lost. This may be due, for example, to the fact that the reference clocks (crystal oscillator circuits, etc.) on which the microcomputers of the radio wave emission device 11 and one or more extended radiation devices 12-1 to 12-7 operate are not the same. Even if the same frequency reference clock is used, there is actually a frequency error in ppm units, and therefore, as time passes, the synchronization error between the radio wave emission device 11 and one or more extended radiation devices 12-1 to 12-7 may increase.

[0122] In the present embodiment, as described above, in the radio wave emission system 1, the radio wave emission device 11 and one or more extended radiation devices 12-1 to 12-7 operate in synchronization with each other using a synchronization signal. FIG. 8 is an explanatory diagram of the synchronization method of the radio wave emission system 1. In FIG. 8, the extended radiation devices 12-1 to 12-7 are daisy-chained to the radio wave emission device 11 in terms of the synchronization signal. Specifically, the first synchronization terminal 814 of the radio wave emission device 11 is connected to the input terminal 824a of the second synchronization terminal 824 of the extended radiation device 12-1, and the output terminal 824b of the second synchronization terminal 824 of the extended radiation device 12-1 is connected to the input terminal 824a of the second synchronization terminal 824 of the extended radiation device 12-2. Subsequently, the output terminal 824b of the second synchronization terminal 824 of the extended radiation devices 12-3 to 12-6 is connected to the input terminal 824a of the second synchronization terminal 824 of the subsequent extended radiation devices 12-4 to 12-7, respectively. As a result, the synchronization signal output from the first synchronization terminal 814 of the radio wave emission device 11 is transmitted in sequence to the extended radiation devices 12-1 to 12-7. This allows the radio wave emission device 11 and one or more extended radiation devices 12-1 to 12-7 to operate in synchronization with each other via the synchronization signal.

[0123] In the radio wave emission system 1, when the types of the first control information and the second control information are asynchronous control, the radio wave emission device 11 and the one or more extended emission devices 12 are not synchronized and operate independently. In this case, no synchronization signal is required.

[0124] [1.1.2 Application Examples] Next, application examples of the radio wave emission system 1 according to this embodiment will be described.

[0125] 9 is a schematic diagram of an application example 1 of the radio wave emission system 1 according to one embodiment. Application example 1 is a microwave power supply device 300. The microwave power supply device 300 includes the radio wave emission system 1, an operation unit 310, a control unit 320, and a radio wave emission element 330. The radio wave emission system 1, the operation unit 310, the control unit 320, and the radio wave emission element 330 are housed in the same housing.

[0126] The operation unit 310 receives information from the user and presents the information to the user. The operation unit 310 constitutes, for example, a graphical user interface (GUI).

[0127] The control unit 320 transmits a first communication signal or a second communication signal to the radio wave radiation system 1 in response to an input to the operation unit 310. As an example, when a target value for the output power of the radio wave radiation system 1 is input to the operation unit 310, the control unit 320 determines the target values ​​for the output power of the radio wave radiation device 11 and each extended radiation device 12 of the radio wave radiation system 1 based on the target value of the output power of the radio wave radiation system 1, and transmits a first communication signal and a second communication signal indicating the target values ​​of the output power of the radio wave radiation device 11 and each extended radiation device 12 to the radio wave radiation device 11 and each extended radiation device 12. The control unit 320 is, for example, an application controller unit (ACU).

[0128] The radio wave emitting element 330 is connected to the first radio wave emitting section 51 of the radio wave emitting device 11 of the radio wave emitting system 1. The radio wave emitting element 330 emits a first radio wave based on an amplified first high-frequency signal from the first radio wave emitting section 51. The radio wave emitting element 330 may be connected to the second radio wave emitting section 52 of the extended emitting device 12 of the radio wave emitting system 1, and may emit a second radio wave based on an amplified second high-frequency signal from the second radio wave emitting section 52.

[0129] In the microwave power supply device 300, the radio wave radiation system 1 and the control unit 320 are housed in the same housing. A communication path 340 is formed between the radio wave radiation system 1 and the control unit 320. The communication path 340 is configured using the third communication terminal 811 of the first communication unit 81 of the radio wave radiation device 11 of the radio wave radiation system 1 or the fifth communication terminal 821 of the second communication unit 82 of the extended radiation device 12. The communication path 340 is set so that the wiring length is 50 cm or less.

[0130] In the first application example, instead of the radio wave emission system 1, the radio wave emission device 11 may be used alone.

[0131] 10 is a schematic diagram of an application example 2 of the radio wave emission system 1 according to an embodiment. Application example 1 is a microwave heating device 400 such as a microwave oven. The microwave heating device 400 includes the radio wave emission system 1, an operation unit 410, a control unit 420, an antenna 430, and a cavity 440. The radio wave emission system 1, the operation unit 410, the control unit 420, the antenna 430, and the cavity 440 are housed in the same housing.

[0132] The operation unit 410 receives information from the user and presents the information to the user. The operation unit 410 constitutes, for example, a graphical user interface (GUI).

[0133] The control unit 420 transmits a first communication signal or a second communication signal to the radio wave emission system 1 in response to an input to the operation unit 410. Similar to the control unit 320, the control unit 420 transmits a first communication signal and a second communication signal indicating target values ​​of the output power of the radio wave emission device 11 and each extended radiation device 12 to the radio wave emission device 11 and each extended radiation device 12. The control unit 420 is, for example, an application controller unit (ACU).

[0134] The antenna 430 is connected to the first radio wave emitting section 51 of the radio wave emitting device 11 of the radio wave emitting system 1. The antenna 430 radiates a first radio wave based on an amplified first high-frequency signal from the first radio wave emitting section 51. The antenna 430 may be connected to the second radio wave emitting section 52 of the extended radiating device 12 of the radio wave emitting system 1, and radiate a second radio wave based on an amplified second high-frequency signal from the second radio wave emitting section 52.

[0135] The cavity 440 accommodates an object to be radiated (an object to be heated). The antenna 430 is disposed in the cavity 440, and enables the first radio wave or the second radio wave to be radiated to the object to be heated within the cavity 440.

[0136] In the microwave heating device 400, the radio wave radiation system 1 and the control unit 420 are housed in the same housing. A communication path 450 is formed between the radio wave radiation system 1 and the control unit 320. The communication path 450 is configured using the third communication terminal 811 of the first communication unit 81 of the radio wave radiation device 11 of the radio wave radiation system 1 or the fifth communication terminal 821 of the second communication unit 82 of the extended radiation device 12. The communication path 450 is set so that the wiring length is 50 cm or less.

[0137] In the second application example, instead of the radio wave emission system 1, the radio wave emission device 11 may be used alone.

[0138] 11 is a schematic diagram of an application example 3 of the radio wave emission system 1 according to an embodiment. Application example 3 is a microwave power supply system 500. The microwave power supply system 500 includes the radio wave emission system 1, a control device 510, and a combiner 520.

[0139] The radio wave emission system 1 includes a radio wave emission device 11 and seven extended radiation devices 12. The seven extended radiation devices 12 are connected to seven output terminals (second output terminals) 611 of the output section 61 of the radio wave emission device 11 via coaxial cables C1, respectively.

[0140] The control device 510 includes an operation unit 511 and a control unit 512 .

[0141] The operation unit 511 receives information from the user and presents the information to the user. The operation unit 511 constitutes, for example, a graphical user interface (GUI).

[0142] The control unit 512 transmits a first communication signal or a second communication signal to the radio wave emission system 1 in response to an input to the operation unit 511. Similar to the control unit 320, the control unit 512 transmits a first communication signal and a second communication signal indicating target values ​​of the output power of the radio wave emission device 11 and each extended radiation device 12 to the radio wave emission device 11 and each extended radiation device 12.

[0143] A communication path 530 is formed between the radio wave emission system 1 and the control unit 512 of the control device 510. The communication path 530 is configured using the fourth communication terminal 812 of the first communication unit 81 of the radio wave emission device 11 of the radio wave emission system 1 or the sixth communication terminal 822 of the second communication unit 82 of the extended emission device 12. The communication path 530 is compatible with, for example, RS485, and enables stable communication even if the wiring length is 50 cm or more.

[0144] The combiner 520 is connected via a coaxial cable to the first radio wave emitting section 51 of the radio wave emitting device 11 and the second radio wave emitting sections 52 of the seven extended radiating devices 12 of the radio wave radiating system 1. The combiner 520 combines and outputs eight high-frequency signals (the first high-frequency signal and the seven high-frequency signals) input from the radio wave radiating system 1. In Fig. 11, the power of the eight high-frequency signals is 250 W, and the power of the combined high-frequency signal is 2 kW.

[0145] In the radio wave emission system 1, the combiner 520 combines the power output from the radio wave emission device 11 and the one or more extended emission devices 12 to produce radio waves that are radiated. However, depending on the application, some of the power may be reflected due to impedance mismatch or the like, and this reflected power may generate reflected waves inside the radio wave emission device 11 and the one or more extended emission devices 12 via the combiner 520. As described above, the reflected waves are detected by the couplers 1411 and 1412 and the detection circuits 151 and 152, and when the reflected waves are consumed by the terminators 131 and 132, they increase the temperatures of the terminators 131 and 132.

[0146] As described above, the detection circuit 151 and the temperature sensors 1611 and 1612 are used as a first abnormality detection unit that detects a first index value of an abnormality in the radio wave emission device 11. The first control unit 91 stops or reduces radio wave radiation (radiation of the first radio wave) when the first index value detected by the first abnormality detection unit exceeds a first threshold. This makes it possible to resolve the abnormal state of the radio wave emission device 11. Furthermore, the detection circuit 152 and the temperature sensors 1621 and 1622 are used as a second abnormality detection unit that detects a second index value of an abnormality in the extended radiation device 12. The second control unit 92 stops or reduces radio wave radiation (radiation of the second radio wave) when the second index value detected by the second abnormality detection unit exceeds a second threshold. This makes it possible to resolve the abnormal state of the extended radiation device 12.

[0147] However, if the power flowing back through the combiner 520 is not distributed evenly to the radio wave emitting device 11 and the one or more extended radiating devices 12, or if even if the power is distributed evenly, there is an error in the detection circuit of each of the radio wave emitting device 11 and the one or more extended radiating devices 12, or if there is an individual difference in temperature rise due to differences in the cooling conditions of each of them, it may be determined that only one or some of the multiple radiating devices (the radio wave emitting device 11 and the one or more extended radiating devices 12) of the radio wave emitting system 1 is in an abnormal state. If the radio wave radiation of a radiating device determined to be in an abnormal state is stopped or reduced, the combining characteristics of the combiner 520 may change, and radio waves from radiating devices that are not determined to be in an abnormal state may flow into the radiating device determined to be in an abnormal state, so that the abnormal state of the radiating device determined to be in an abnormal state may not be resolved even though the radio wave radiation of the radiating device determined to be in an abnormal state has been stopped or reduced.

[0148] Therefore, when the first index value detected by the first abnormality detection unit exceeds the first threshold, the first control unit 91 may transmit a first abnormality signal through the first communication unit 81. Furthermore, when the second index value detected by the second abnormality detection unit exceeds the second threshold, the second control unit 92 may transmit a second abnormality signal through the second communication unit 82.

[0149] The first abnormal signal is transmitted to one or more extended radiating devices 12 (12-1 to 12-7). Then, in one or more extended radiating devices 12 (12-1 to 12-7), the second control unit 92 may stop or reduce radio wave radiation (radiation of the second radio wave) upon receiving the first abnormal signal. This reduces the influence of other radiating devices, thereby eliminating the abnormal state of the radio wave radiating device 11. The first abnormal signal may be transmitted directly to one or more extended radiating devices 12 (12-1 to 12-7). Alternatively, the first abnormal signal may be transmitted to the control unit 512, which then transmits the first abnormal signal to one or more extended radiating devices 12 (12-1 to 12-7).

[0150] The second abnormal signal is transmitted to the radio wave emission device 11 and one or more of the one or more extended radiation devices 12 that have not transmitted the second abnormal signal (i.e., radiation devices that have not been determined to be in an abnormal state). In the radio wave emission device 11, the first control unit 91 may stop or reduce radio wave emission (radiation of the first radio wave) upon receiving the second abnormal signal. In one or more extended radiation devices 12 (12-1 to 12-7), the second control unit 92 may stop or reduce radio wave emission (radiation of the second radio wave) upon receiving the second abnormal signal. This reduces the influence of other radiation devices, thereby enabling the abnormal state of the extended radiation device 12 to be resolved. The second abnormal signal may be transmitted directly to radiation devices that have not been determined to be in an abnormal state. Alternatively, the second abnormal signal may be transmitted to the control unit 512, which then transmits the second abnormal signal to radiation devices that have not been determined to be in an abnormal state.

[0151] Note that at least one, but not all, of the second control units 92 that received the first abnormal signal may stop or reduce radio wave radiation. Also, at least one, but not all, of the first control unit 91 of the radio wave emitting device 11 that received the second abnormal signal and the second control units 92 of one or more extended radiating devices 12 that received the second abnormal signal may stop or reduce radio wave radiation. For example, when an abnormal state is determined in one of the multiple radiating devices, which of the remaining radiating devices should stop or reduce radio wave radiation may be determined based on the configuration of the radio wave radiating system 1. For example, in a radiating device that is not coupled to the radiating device determined to be in an abnormal state by a combiner or the like and is independent, radio wave radiation does not necessarily have to be stopped or reduced.

[0152] [1.1.3 Effects, etc.] The radio wave emission system 1 described above includes a radio wave emission device 11 and one or more extended emission devices 12. The radio wave emission device 11 includes a signal generating unit 2 that generates a plurality of high-frequency signals, a first radio wave emission unit 51 that can emit a first radio wave based on a first high-frequency signal among the plurality of high-frequency signals, an output unit 61 that has one or more output terminals 611 connectable to coaxial cables C1 and C2 and that outputs one or more second high-frequency signals among the plurality of high-frequency signals from one or more second output terminals 611 among the one or more output terminals 611, a first communication unit 81 that has one or more first communication terminals 811, 812 connectable to a communication cable, a first control unit 91 that controls emission of the first radio waves in accordance with a first communication signal received through the first communication unit 81, and a first casing 210 that accommodates at least a portion of the signal generating unit 2, the first radio wave emission unit 51, the output unit 61, the first communication unit 81, and the first control unit 91. Each of the one or more extended radiation devices 12 includes a second input unit 72 connected to one of the one or more second output terminals 611 via a coaxial cable C1 and receiving one of the one or more second high-frequency signals, a second radio wave radiation unit 52 that can radiate a second radio wave based on the second high-frequency signal input to the second input unit 72, a second communication unit 82 having one or more second communication terminals 821, 822 that can be connected to a communication cable, a second control unit 92 that controls radiation of the second radio wave in accordance with the second communication signal received through the second communication unit 82, and a second casing 220 that accommodates the second input unit 72, the second radio wave radiation unit 52, the second communication unit 82, and the second control unit 92. In the first casing 210, the first radio wave radiation unit 51 is arranged in a different orientation from the one or more output terminals 611 and the one or more first communication terminals 811, 812. In the second casing 220, the second radio wave emitting portion 52 is arranged in a different orientation from the second input portion 72 and the one or more second communication terminals 821, 822. This configuration makes it possible to reduce radio wave interference with a simple structure.

[0153] In the radio wave emission system 1, in the first casing 210, one or more output terminals 611 are arranged in a different orientation from one or more first communication terminals 811, 812. This configuration makes it possible to reduce radio wave interference with a simple structure.

[0154] In the radio wave radiation system 1, one or more first communication terminals 811, 812 include a third communication terminal 811 and a fourth communication terminal 812 that are of different communication standards. The third communication terminal 811 and the fourth communication terminal 812 are arranged in different orientations in the first casing 210. This configuration makes it possible to reduce radio wave interference with a simple structure.

[0155] In the radio wave emission system 1, the first communication unit 81 includes a first synchronization terminal 814, and the second communication unit 82 includes a second synchronization terminal 824. The first control unit 91 performs operations based on a synchronization signal and outputs the synchronization signal from the first synchronization terminal 814 to the second synchronization terminal 824. The second control unit 92 performs operations based on the synchronization signal received through the second synchronization terminal 824. This configuration enables synchronization between the radio wave emission device 11 and one or more extended radiation devices 12.

[0156] In the radio wave emission system 1, the radio wave emission device 11 further includes a first power input unit 101 having one or more first power terminals 1011, 1012 connectable to a power cable. In the first casing 210, the one or more first power terminals 1011, 1012 are arranged in a different orientation from at least one of the first radio wave emission unit 51 and the one or more output terminals 611. This configuration makes it possible to reduce radio wave interference with a simple structure.

[0157] In the radio wave emission system 1, the radio wave emission device 11 further includes a first signal amplifier 41 that amplifies the first high-frequency signal and a first high-frequency filter 111 that attenuates high-frequency signals corresponding to the frequency bands of the first high-frequency signal and one or more second high-frequency signals. The first radio wave emission unit 51 is capable of emitting a first radio wave based on the first high-frequency signal amplified by the first signal amplifier. The first high-frequency filter 111 is connected to at least one of the one or more first power supply terminals 1011, 1012, the first power supply terminal (third power supply terminal 1011) that is used to supply power to the signal generating unit 2 or the first signal amplifier 41. This configuration enables reduction of radio wave interference with a simple structure.

[0158] In the radio wave emission system 1, the first casing 210 has a first top wall 211, a first bottom wall 212, and a first side wall 213. The first side wall 213 includes a first wall portion 213a and a second wall portion 213b that are on opposite sides in a first direction, and a third wall portion 213c and a fourth wall portion 213d that are on opposite sides in a second direction that intersects the first direction. The first radio wave emission portion 51 is located on the first wall portion 213a. One or more output terminals 611 are located on the third wall portion 213c. One or more first communication terminals 811, 812 are located on at least one of the second wall portion 213b and the fourth wall portion 213d. This configuration enables reduction of radio wave interference with a simple structure.

[0159] In the radio wave emission system 1, within the first casing 210, the first control unit 91 and the first communication unit 81 are located on the fourth wall 213d side, the output unit 61 is located on the third wall 213c side, and the first radio wave emission unit 51 is located between the first control unit 91 and the first communication unit 81 and the output unit 61 in the second direction. This configuration makes it possible to separate digital circuits such as the first control unit 91 and the first communication unit 81 from analog circuits such as the first radio wave emission unit 51 and the output unit 61. Furthermore, the shielding structure within the first casing 210 can be simplified.

[0160] In the radio wave emission system 1, a first shield 214 is arranged in the first casing 210 at least partially between the first control unit 91 and the first communication unit 81 and the first radio wave emission unit 51. A second shield 215 is arranged in the first casing 210 at least partially between the output unit 61 and the first radio wave emission unit 51. This configuration can reduce the effects of high frequency leakage from the first radio wave emission unit 51 on the first control unit 91, the first communication unit 81, and the output unit 61.

[0161] In the radio wave emission system 1, the radio wave emission device 11 includes a first adjustment unit 31 that adjusts at least one of the phase and power of the first high-frequency signal, and a first signal amplification unit 41 that amplifies the first high-frequency signal adjusted by the first adjustment unit 31. The first radio wave emission unit 51 enables the first radio wave to be emitted based on the first high-frequency signal amplified by the first signal amplification unit. The first adjustment unit 31 and the first signal amplification unit 41, together with the first radio wave emission unit 51, are located between the first control unit 91 and the first communication unit 81 and the output unit 61 in the second direction. This configuration allows digital circuits such as the first control unit 91 and the first communication unit 81 to be separated from analog circuits such as the first radio wave emission unit 51, the output unit 61, the first adjustment unit 31, and the first signal amplification unit 41. This simplifies the shielding structure within the first casing 210.

[0162] In the radio wave emission system 1, in the second casing 220, the second input section 72 is arranged in a different orientation from the one or more second communication terminals 821, 822. This configuration makes it possible to reduce radio wave interference with a simple structure.

[0163] In the radio wave radiation system 1, the one or more second communication terminals 821, 822 include a fifth communication terminal 821 and a sixth communication terminal 822 that are of different communication standards. The fifth communication terminal 821 and the sixth communication terminal 822 are arranged in different orientations in the second casing 220. This configuration makes it possible to reduce radio wave interference with a simple structure.

[0164] In the radio wave radiation system 1, each of the one or more extended radiation devices 12 further includes a second power input unit 102 having one or more second power terminals 1021, 1022 connectable to a power cable. In the second casing 220, the one or more second power terminals 1021, 1022 are arranged in a different orientation from at least one of the second radio wave radiation unit 52 or the second input unit 72. This configuration enables reduction of radio wave interference with a simple structure.

[0165] In the radio wave radiation system 1, each of the one or more extended radiation devices 12 further includes a second signal amplifier 42 that amplifies the second high-frequency signal, and a second high-frequency filter 112 that attenuates high-frequency signals corresponding to the frequency bands of the first high-frequency signal and one or more second high-frequency signals. The second radio wave radiation unit 52 is capable of radiating a second radio wave based on the second high-frequency signal amplified by the second signal amplifier 42. The second high-frequency filter 112 is connected to at least one second power supply terminal (fifth power supply terminal 1021) used to supply power to the second signal amplifier 42, out of one or more second power supply terminals 1021, 1022. This configuration enables reduction of radio wave interference with a simple structure.

[0166] In the radio wave emission system 1, the second casing 220 has a second top wall 221, a second bottom wall 222, and a second side wall 223. The second side wall 223 includes a fifth wall portion 223a and a sixth wall portion 223b on opposite sides in the third direction, and a seventh wall portion 223c and an eighth wall portion 223d on opposite sides in a fourth direction intersecting the third direction. The second radio wave emission portion 52 is located on the fifth wall portion 223a. The second input portion 72 is located on the seventh wall portion 223c. One or more second communication terminals 821, 822 are located on at least one of the sixth wall portion 223b and the eighth wall portion 223d. This configuration enables reduction of radio wave interference with a simple structure.

[0167] In the radio wave emission system 1, within the second casing 220, the second control unit 92 and the second communication unit 82 are located on the eighth wall 223d side, the second input unit 72 is located on the seventh wall 223c side, and the second radio wave emission unit 52 is located between the second control unit 92 and the second communication unit 82 and the second input unit 72 in the fourth direction. This configuration makes it possible to separate digital circuits such as the second control unit 92 and the second communication unit 82 from analog circuits such as the second radio wave emission unit 52 and the second input unit 72. This simplifies the shielding structure within the second casing 220.

[0168] In the radio wave emission system 1, a third shield 224 is arranged in the second casing 220 at least partially between the second control unit 92 and the second communication unit 82 and the second radio wave emission unit 52. A fourth shield 225 is arranged in the second casing 220 at least partially between the second input unit 72 and the second radio wave emission unit 52. This configuration can reduce the effects of high frequency leakage from the second radio wave emission unit 52 on the second control unit 92, the second communication unit 82, and the second input unit 72.

[0169] In the radio wave emission system 1, each of the one or more extended radiating devices 12 includes a second adjustment unit 32 that adjusts at least one of the phase and power of a second high-frequency signal input to a second input unit 72, and a second signal amplifier 42 that amplifies the second high-frequency signal adjusted by the second adjustment unit 32. The second radio wave emission unit 52 is capable of radiating a second radio wave based on the second high-frequency signal amplified by the second signal amplifier 42. The second adjustment unit 32 and the second signal amplifier 42, together with the second radio wave emission unit 52, are located between the second control unit 92 and the second communication unit 82 and the second input unit 72 in the fourth direction. This configuration allows digital circuits such as the second control unit 92 and the second communication unit 82 to be separated from analog circuits such as the second radio wave emission unit 52, the second input unit 72, the second adjustment unit 32, and the second signal amplifier 42. This simplifies the shielding structure within the second casing 220.

[0170] The radio wave emission system 1 described above includes a radio wave emission device 11 and one or more extended emission devices 12. The radio wave emission device 11 includes a signal generating unit 2 that generates a plurality of high-frequency signals, a first radio wave emission unit 51 that can emit a first radio wave based on a first high-frequency signal among the plurality of high-frequency signals, an output unit 61 that has one or more output terminals 611 connectable to coaxial cables C1 and C2 and outputs one or more second high-frequency signals among the plurality of high-frequency signals from one or more second output terminals 611 among the one or more output terminals 611, a first communication unit 81 that has one or more first communication terminals 811, 812 connectable to a communication cable, a first control unit 91 that controls emission of the first radio waves in accordance with the first communication signal received through the first communication unit 81, and a first abnormality detection unit (a detection circuit 151, temperature sensors 1611, 1612) that detects a first index value of an abnormality in the radio wave emission device 11. Each of the one or more extended radiating devices 12 includes a second input unit 72 connected to one of the one or more second output terminals 611 via a coaxial cable C1 and receiving one of the one or more second high-frequency signals, a second radio wave radiating unit 52 configured to radiate a second radio wave based on the second high-frequency signal input to the second input unit 72, a second communication unit 82 having one or more second communication terminals 821, 822 connectable to a communication cable, a second control unit 92 configured to control the radiation of the second radio wave in response to the second communication signal received through the second communication unit 82, and a second abnormality detection unit (a detection circuit 152, temperature sensors 1621, 1622) configured to detect a second index value of an abnormality of the extended radiating device 12. When the first index value detected by the first abnormality detection unit exceeds a first threshold, the first control unit 91 transmits a first abnormality signal through the first communication unit 81, and at least one of the second control units 92 that receive the first abnormality signal stops or reduces radio wave radiation. When the second index value detected by the second abnormality detection unit exceeds the second threshold, the second control unit 92 transmits a second abnormality signal through the second communication unit 82, and at least one of the first control unit 91 of the radio wave emission device 11 that received the second abnormality signal and the second control unit 92 of one or more extended radiation devices that received the second abnormality signal stops or reduces radio wave emission. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0171] In the radio wave emission system 1, the first control unit 91 stops or reduces radio wave emission when the first index value detected by the first abnormality detection unit exceeds the first threshold. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0172] In the radio wave emission system 1, the second control unit 92 stops or reduces radio wave emission when the second index value detected by the second abnormality detection unit exceeds the second threshold. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0173] In the radio wave emission system 1, the first abnormality detection unit includes a detection circuit 151 that measures the power of the reflected wave of the first radio wave as the first index value. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0174] In the radio wave emission system 1, the first abnormality detection unit includes temperature sensors 1611 and 1612 that measure, as a first index value, the temperature of the radio wave emission device 11. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0175] In the radio wave emission system 1, the radio wave emission device 11 includes a terminator 131 that consumes the reflected wave of the first radio wave as heat, and a temperature sensor 1612 measures the temperature of the terminator 131. This configuration makes it possible to resolve abnormalities in the radio wave emission system 1.

[0176] In the radio wave emission system 1, the second abnormality detection unit includes a detection circuit 152 that measures the power of the reflected wave of the second radio wave as the second index value. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0177] In the radio wave emission system 1, the second abnormality detection unit includes temperature sensors 1621 and 1622 that measure, as the second index value, the temperature of the extended radiation device 12. This configuration makes it possible to resolve the abnormality in the radio wave emission system 1.

[0178] In the radio wave emission system 1, each of the one or more extended emission devices 12 includes a terminator 132 that consumes the reflected wave of the second radio wave as heat, and the temperature sensor 1622 measures the temperature of the terminator 132. This configuration makes it possible to resolve abnormalities in the radio wave emission system 1.

[0179] 12 is a schematic circuit diagram of a radio wave emitting device 11A according to embodiment 2. The radio wave emitting device 11A includes a signal generating unit 2, a first adjusting unit 31, a first signal amplifying unit 41, a first radio wave emitting unit 51, an output unit 61A, a first communication unit 81, a first control unit 91, a first power supply input unit 101, and a first high-frequency filter 111. The radio wave emitting device 11A further includes a non-reciprocal circuit 121, a terminator 131, couplers 1411 and 1412, a detection circuit 151, and temperature sensors 1611 and 1612.

[0180] The signal generating unit 2 generates a plurality of high-frequency signals. In this embodiment, the signal generating unit 2 is configured to be able to generate a maximum of eight high-frequency signals. The plurality of high-frequency signals have the same frequency band and phase. The plurality of high-frequency signals include a first high-frequency signal and one or more second high-frequency signals.

[0181] In the present embodiment, there is no particular limitation on the number of extended radiation devices 12 that can be connected to the radio wave radiation device 11. In other words, there is no particular limitation on the number of high-frequency signals generated by the signal generating unit 2, the number of output terminals 611 of the output unit 61, etc.

[0182] In this embodiment, the signal generating unit 2 does not necessarily have to include the power adjusting unit 22 .

[0183] The first adjustment unit 31 is connected to the signal generating unit 2 so as to receive one (first high-frequency signal) of the multiple high-frequency signals generated by the signal generating unit 2 .

[0184] The output unit 61A is connected to the signal generating unit 2 so as to receive one or more (second high-frequency signals) of the multiple high-frequency signals generated by the signal generating unit 2. Therefore, the output unit 61A does not include an output terminal 611 used as a first output terminal for outputting the first high-frequency signal, but includes output terminals 611 used as second output terminals for outputting the second high-frequency signal. In this way, the output unit 61A outputs one or more second high-frequency signals from one or more second output terminals 611 among the multiple output terminals 611.

[0185] [1.2.2 Effects, etc.] In the radio wave emission device 11A, the first high-frequency signal is input from the signal generating unit 2 to the first adjustment unit 31 inside the first casing 210, and one or more second high-frequency signals are input from the signal generating unit 2 to the output unit 61A inside the first casing 210. This configuration eliminates the need for the coaxial cable C2 for inputting the first high-frequency signal from the signal generating unit 2 to the first adjustment unit 31, thereby reducing costs.

[0186] 13 is a diagram illustrating a synchronization method of a radio wave emission system 1B according to embodiment 3. The radio wave emission system 1B includes a radio wave emission device 11B and one or more extended emission devices 12 (12-1 to 12-7).

[0187] Unlike the first embodiment, in this embodiment, a synchronization signal is provided to the radio wave emission device 11B from an external synchronization unit 13. The synchronization unit 13 may be, for example, the control unit 320 in the first application example, the control unit 420 in the second application example, or the control unit 512 in the third application example.

[0188] 14 is a schematic circuit diagram of a first example of the radio wave emission device 11B (hereinafter, referred to as radio wave emission device 11B1). The radio wave emission device 11B1 differs from the radio wave emission device 11 mainly in that it includes a first communication unit 81B instead of the first communication unit 81. The first communication unit 81B includes a first synchronization terminal 814B. The first synchronization terminal 814B is a terminal for a synchronization signal. In this embodiment, the first synchronization terminal 814B includes an input terminal 814a, an output terminal 814b, and a buffer amplifier 814c between the input terminal 814a and the output terminal 814b. The synchronization signal is input to the first control unit 91 from the input terminal 814a and output from the output terminal 814b via the buffer amplifier 814c.

[0189] 15 is a schematic circuit diagram of a second example of the radio wave emission device 11B (hereinafter referred to as radio wave emission device 11B2). The radio wave emission device 11B2 differs from the radio wave emission device 11A mainly in that it includes a first communication unit 81B instead of the first communication unit 81.

[0190] In both the radio wave emission device 11B1 and the radio wave emission device 11B2, the first control unit 91 executes operations based on a synchronization signal received through the first synchronization terminal 814B of the first communication unit 81B. Specifically, the first control unit 91 controls the emission of the first radio wave from the first radio wave emission unit 51 based on the synchronization signal.

[0191] 13, with regard to the synchronization signal, the radio wave radiation device 11B and the extended radiation devices 12-1 to 12-7 are daisy-chain connected to the synchronization unit 13. Specifically, the synchronization unit 13 is connected to the input terminal 814a of the first synchronization terminal 814B of the radio wave radiation device 11B. The output terminal 814b of the first synchronization terminal 814B of the radio wave radiation device 11B is connected to the input terminal 824a of the second synchronization terminal 824 of the extended radiation device 12-1, and the output terminal 824b of the second synchronization terminal 824 of the extended radiation device 12-1 is connected to the input terminal 824a of the second synchronization terminal 824 of the extended radiation device 12-2. Thereafter, the output terminal 824b of the second synchronization terminal 824 of the extended radiation devices 12-3 to 12-6 is connected to the input terminal 824a of the second synchronization terminal 824 of the subsequent extended radiation devices 12-4 to 12-7, respectively. As a result, the synchronization signal output from the synchronization unit 13 is transmitted in sequence to the radio wave emission device 11B and the extended radiation devices 12-1 to 12-7, thereby enabling the radio wave emission device 11B and one or more extended radiation devices 12-1 to 12-7 to operate in synchronization with each other via the synchronization signal.

[0192] [1.3.2 Effects, etc.] In the radio wave emission system 1B, the first communication unit 81B includes a first synchronization terminal 814B, and the second communication unit 82 includes a second synchronization terminal 824. The first control unit 91 performs operations based on a synchronization signal received through the first synchronization terminal 814B. The second control unit 92 performs operations based on a synchronization signal received through the second synchronization terminal 824. This configuration enables synchronization between the radio wave emission device 11B and one or more extended radiation devices 12.

[0193] 16 is a diagram illustrating a synchronization method of a radio wave emission system 1C according to embodiment 4. The radio wave emission system 1C includes a radio wave emission device 11C and one or more extended emission devices 12C (12C-1 to 12C-7).

[0194] FIG. 17 is a schematic circuit diagram of a first example of the radio wave emission device 11C (hereinafter, referred to as the radio wave emission device 11C1). The radio wave emission device 11C1 differs from the radio wave emission device 11 mainly in that it includes a first communication unit 81C1 instead of the first communication unit 81. The first communication unit 81C1 includes a plurality of first synchronization terminals 814. Each of the plurality of first synchronization terminals 814 is connected to the first control unit 91. The number of first synchronization terminals 814 is set to be equal to or greater than the number of one or more extended radiation devices 12C (12C-1 to 12C-7). This allows synchronization signals to be provided in parallel from the radio wave emission device 11C1 to one or more extended radiation devices 12C (12C-1 to 12C-7).

[0195] FIG. 18 is a schematic circuit diagram of a second example of the radio wave emission device 11C (hereinafter, referred to as the radio wave emission device 11C2). The radio wave emission device 11C2 differs from the radio wave emission device 11 mainly in that it includes a first communication unit 81C2 instead of the first communication unit 81. The first communication unit 81C2 includes a plurality of first synchronization terminals 814. Each of the plurality of first synchronization terminals 814 is connected to an output terminal of a buffer amplifier 814d, and an input terminal of the buffer amplifier 814d is connected to a first control unit 91. The number of first synchronization terminals 814 is set to be equal to or greater than the number of one or more extended radiation devices 12C (12C-1 to 12C-7). This allows synchronization signals to be provided in parallel from the radio wave emission device 11C2 to one or more extended radiation devices 12C (12C-1 to 12C-7).

[0196] 19 is a schematic circuit diagram of a third example of the radio wave emission device 11C (hereinafter referred to as radio wave emission device 11C3). The radio wave emission device 11C3 differs from the radio wave emission device 11A mainly in that it includes a first communication unit 81C1 instead of the first communication unit 81.

[0197] 20 is a schematic circuit diagram of a fourth example of the radio wave emission device 11C (hereinafter referred to as radio wave emission device 11C4). The radio wave emission device 11C4 differs from the radio wave emission device 11A mainly in that it includes a first communication unit 81C2 instead of the first communication unit 81.

[0198] In any of the radio wave emitting devices 11C1 to 11C4, the first control unit 91 executes operations based on the synchronization signal. Specifically, the first control unit 91 controls the emission of the first radio wave from the first radio wave emitting unit 51 based on the synchronization signal. In the present embodiment, the first control unit 91 outputs the synchronization signal from the first synchronization terminal 814.

[0199] 21 is a schematic circuit diagram of an example of an extended radiating device 12C. The extended radiating device 12C differs from the extended radiating device 12 mainly in that it includes a second communication unit 82C instead of the second communication unit 82. The second communication unit 82C includes a second synchronization terminal 824C. The second synchronization terminal 824C has the same configuration as the input terminal 824a of the second synchronization terminal 824.

[0200] 16, with regard to the synchronization signal, the extended radiation devices 12C-1 to 12C-7 are connected in parallel to the radio wave radiation device 11C. Specifically, the second synchronization terminals 824C of the extended radiation devices 12C-1 to 12C-7 are connected to the multiple first synchronization terminals 814 of the radio wave radiation device 11C, respectively. As a result, the synchronization signal output from the radio wave radiation device 11C is simultaneously transmitted to the extended radiation devices 12C-1 to 12C-7. This allows the radio wave radiation device 11C and one or more extended radiation devices 12C-1 to 12C-7 to operate in synchronization with each other via the synchronization signal.

[0201] [1.4.2 Effects, etc.] In the radio wave emission system 1C, the first communication units 81C1 and 81C2 include one or more first synchronization terminals 814, and the second communication unit 82C includes a second synchronization terminal 824C. The first control unit 91 performs operations based on synchronization signals and outputs synchronization signals from the one or more first synchronization terminals 814 to the second synchronization terminals 824C of one or more extended radiation devices 12C-1 to 12C-7. The second control unit 92 performs operations based on synchronization signals received via the second synchronization terminals 824C. This configuration enables synchronization between the radio wave emission device 11C and one or more extended radiation devices 12C.

[0202] 22 is a diagram illustrating a synchronization method of a radio wave emission system 1D according to embodiment 5. The radio wave emission system 1D includes a radio wave emission device 11D and one or more extended emission devices 12C (12C-1 to 12C-7).

[0203] Unlike the fourth embodiment, in this embodiment, a synchronization signal is provided to the radio wave emission device 11D and one or more extended emission devices 12C (12C-1 to 12C-7) from an external synchronization unit 13. The synchronization unit 13 may be, for example, the control unit 320 in the first application example, the control unit 420 in the second application example, or the control unit 512 in the third application example.

[0204] 23 is a schematic circuit diagram of a first example of the radio wave emission device 11D (hereinafter referred to as the radio wave emission device 11D1). The radio wave emission device 11D1 differs from the radio wave emission device 11B1 mainly in that it includes a first communication unit 81D instead of the first communication unit 81B. The first communication unit 81D includes a first synchronization terminal 814D. The first synchronization terminal 814D has the same configuration as the input terminal 814a of the first synchronization terminal 814B.

[0205] 24 is a schematic circuit diagram of a second example of the radio wave emission device 11D (hereinafter referred to as radio wave emission device 11D2). The radio wave emission device 11D2 differs from the radio wave emission device 11B2 mainly in that it includes a first communication unit 81D instead of the first communication unit 81B.

[0206] In both the radio wave emission device 11D1 and the radio wave emission device 11D2, the first control unit 91 executes operations based on a synchronization signal received through the first synchronization terminal 814D of the first communication unit 81D. Specifically, the first control unit 91 controls the emission of the first radio wave from the first radio wave emission unit 51 based on the synchronization signal.

[0207] 22, with regard to the synchronization signal, the radio wave emission device 11B and the extended radiation devices 12-1 to 12-7 are connected in parallel to the synchronization unit 13. Specifically, the synchronization unit 13 is connected to the first synchronization terminal 814D of the radio wave emission device 11D and the second synchronization terminals 824C of the extended radiation devices 12C-1 to 12C-7. As a result, the synchronization signal output from the synchronization unit 13 is simultaneously transmitted to the radio wave emission device 11D and the extended radiation devices 12C-1 to 12C-7. As a result, the radio wave emission device 11D and one or more extended radiation devices 12C-1 to 12C-7 can operate in synchronization with each other via the synchronization signal.

[0208] [1.5.2 Effects, etc.] In the radio wave emission system 1D, the first communication unit 81D includes a first synchronization terminal 814D, and the second communication unit 82C includes a second synchronization terminal 824C. The first control unit 91 performs operations based on a synchronization signal received through the first synchronization terminal 814D. The second control unit 92 performs operations based on a synchronization signal received through the second synchronization terminal 824C. This configuration enables synchronization between the radio wave emission device 11D and one or more extended radiation devices 12C.

[0209] [2. Modifications] The embodiments of the present disclosure are not limited to the above-described first to fifth embodiments. The above-described first to fifth embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above-described first to fifth embodiments are listed below. The modifications described below can be applied in appropriate combinations. Note that, below, reference will be made to the symbols used in the first embodiment, even if they are applicable to any of the above-described first to fifth embodiments. However, this is merely to simplify the description and is not intended to exclude application to the second to fifth embodiments.

[0210] In one variant, the signal generating unit 2 may include an oscillator circuit and a multi-output frequency synthesizer. The oscillator circuit may generate a reference signal. The reference signal is a signal in a frequency band lower than the multiple high-frequency signals. As an example, the frequency band of the reference signal is approximately several tens of megahertz, and the frequency band of the high-frequency signals is approximately 2400 MHz to 2500 MHz. The oscillator circuit, for example, converts commercial AC power to DC power and generates the reference signal by voltage control using a semiconductor supplied with the DC power. The multi-output frequency synthesizer generates multiple high-frequency signals with the same frequency band and phase based on the reference signal. The multi-output frequency synthesizer may be configured to be capable of outputting, for example, up to eight high-frequency signals. One of the eight high-frequency signals is used as a first high-frequency signal, and the remaining seven are used as second high-frequency signals.

[0211] In the first embodiment, the divider 24 outputs a plurality of high-frequency signals by equally dividing a reference high-frequency signal. As a result, the divider 24 outputs high-frequency signals having the same frequency band as the reference high-frequency signal. However, the divider 24 does not necessarily divide the reference high-frequency signal equally. As a modified example, the phases of the reference high-frequency signal input to the divider 24 and the high-frequency signals input to and output from the output terminal 611 may be different. Furthermore, when connecting to a phased array antenna or the like via the first radio wave emitting portion 51 and the second radio wave emitting portion 52 to perform beamforming or the like, the phases of the high-frequency signals output from the first radio wave emitting portion 51 and the second radio wave emitting portion 52 may be set to be different from each other.

[0212] In one modified example, the first adjustment unit 31 may include a phase adjuster and a variable amplifier (or a variable attenuator). That is, the first adjustment unit 31 may be configured to be able to adjust both the phase and power of the first high-frequency signal. On the other hand, the first adjustment unit 31 may be configured to be able to adjust only the phase of the first high-frequency signal. This also applies to the second adjustment unit 32. When the second adjustment unit 32 is capable of adjusting the phase of the second high-frequency signal, the phase of the second high-frequency signal may be adjusted so that the difference between the phase of the second high-frequency signal and the phase (reference phase) of the first high-frequency signal becomes small.

[0213] In the radio wave emission system 1, the phases of the radio waves emitted from the radio wave emission device 11 and the extended radiation device 12 may be the same or different. The first control unit 91 may adjust the phase of the first high-frequency signal using the first adjustment unit 31. For example, the first control unit 91 may adjust the phase of the first high-frequency signal to a phase target value using the first adjustment unit 31. The phase target value may be provided by the first communication signal. When the second control unit 92 is to match the phases of the radio waves emitted from the radio wave emission device 11 and the extended radiation device 12, the second control unit 92 may adjust the phase difference between the first high-frequency signal and the second high-frequency signal using the second adjustment unit 32 so that it becomes zero. For example, the second control unit 92 adjusts the phase of the second high-frequency signal to a phase target value using the second adjustment unit 32. The phase target value may be provided by the second communication signal.

[0214] In one variant, the first adjusting unit 31 and the second adjusting unit 32 may automatically adjust the phase and / or power.

[0215] In one modified example, the first high-frequency filter 111 may be connected to the fourth power supply terminal 1012 in addition to the third power supply terminal 1011. In other words, the first high-frequency filter 111 may be connected to each of the multiple first power supply terminals (the third power supply terminal 1011 and the fourth power supply terminal 1012). The second high-frequency filter 112 may be connected to the sixth power supply terminal 1022 in addition to the fifth power supply terminal 1021. In other words, the second high-frequency filter 112 may be connected to each of the multiple second power supply terminals (the fifth power supply terminal 1021 and the sixth power supply terminal 1022).

[0216] In one modified example, the multiple first communication terminals 811, 812 may be located on at least one of the second wall portion 213b and the fourth wall portion 213d, rather than on both the second wall portion 213b and the fourth wall portion 213d.

[0217] In one modification, the first casing 210 or the second casing 220 may be provided with a cooling structure. Examples of the cooling structure include heat dissipation fins for air cooling and a base plate for water cooling. By providing the cooling structure, it is possible to cool circuit elements that tend to become hot (e.g., the first signal amplifier unit 41 or the second signal amplifier unit 42).

[0218] In one modified example, the shapes of the first casing 210 and the second casing 220 are not particularly limited. For example, the first casing 210 and the second casing 220 are not limited to a rectangular parallelepiped shape, and may be cubic or cylindrical, or may have an irregular shape in which recesses are formed in the wall surfaces of the first casing 210 and the second casing 220 to accommodate the first radio wave emitting portion 51 or the second radio wave emitting portion 52, etc., so that they do not protrude too far outward. In this way, the shapes of the first casing 210 and the second casing 220 can be changed as appropriate depending on the shape of the circuit board 110 or the desired design.

[0219] The arrangement of the circuit elements of the radio wave emitting device 11 within the first casing 210 may differ from that of the above embodiment. In one modification, the detection circuit 151 may be arranged in the analog circuit region R112 rather than the analog circuit region R111. The temperature sensors 1611 and 1612 may be mounted on a single circuit board together with the first signal amplifier 41, the first radio wave emitting unit 51, the non-reciprocal circuit 121, the couplers 1411 and 1412, and the detection circuit 151. In this case, the temperature sensors 1611 and 1612 may be mounted on the solder side of the circuit board for shielding. The distributor 24 of the signal generating unit 2 may be arranged in the analog circuit region R113 rather than the analog circuit region R112.

[0220] The arrangement of the circuit elements of the extended radiating device 12 within the second casing 220 may differ from that of the above embodiment. In one modification, the detection circuit 152 may be arranged in the analog circuit region R212 instead of the analog circuit region R211. The temperature sensors 1621 and 1622 may be mounted on a single circuit board together with the second signal amplifier 42, the second radio wave radiating unit 52, the non-reciprocal circuit 122, the couplers 1421 and 1422, and the detection circuit 152. In this case, the temperature sensors 1621 and 1622 may be mounted on the solder side of the circuit board for shielding purposes.

[0221] In the first embodiment, in the radio wave emission device 11, the first radio wave emission section 51, the one or more output terminals 611 of the output section 61, the first input section 71, the one or more first communication terminals 811, 812, and the one or more first power supply terminals 1011, 1012 are arranged on the first side wall 213 of the first casing 210, but are not limited to this arrangement. As a modified example, at least one of the first radio wave emission section 51, the one or more output terminals 611 of the output section 61, the first input section 71, the one or more first communication terminals 811, 812, and the one or more first power supply terminals 1011, 1012 may be arranged on the first top wall 211 or the first bottom wall 212 of the first casing 210. The same applies to the extended emission device 12.

[0222] In the first embodiment, in the radio wave emitting device 11, with regard to the first radio wave emitting unit 51, the one or more output terminals 611 of the output unit 61, the first input unit 71, the one or more first communication terminals 811, 812, and the one or more first power supply terminals 1011, 1012, being in different orientations does not necessarily require them to be arranged on different surfaces, but may be on the same surface as long as they are in different orientations, and for example, if the first side wall 213 includes a curved surface, the first radio wave emitting unit 51 may be arranged on the curved surface so as to be in a different orientation from the one or more output terminals 611 of the output unit 61 or the one or more first communication terminals 811, 812. The same applies to the extended radiating device 12.

[0223] In one modified example, the first control unit 91 does not necessarily have to stop or reduce radio wave radiation when the first index value detected by the first abnormality detection unit exceeds the first threshold. The second control unit 92 does not necessarily have to stop or reduce radio wave radiation when the second index value detected by the second abnormality detection unit exceeds the second threshold. This is because stopping or reducing radio wave radiation from a radio wave radiation device 11 or an extended radiation device 12 that is not in an abnormal state may resolve the abnormal state of the radio wave radiation device 11 or an extended radiation device 12 that is in an abnormal state.

[0224] In one modification, the number of combiners 1411 and 1412 or the number of combiners 1421 and 1422 is not particularly limited.

[0225] In one modification, there is no particular limitation on the number of temperature sensors 1611 and 1612 or the number of temperature sensors 1621 and 1622. Current sensors may be used instead of the temperature sensors 1611, 1612, 1621, and 1622.

[0226] In one modification, the non-reciprocal circuit 121, the terminator 131, the couplers 1411 and 1412, the detection circuit 151, and the temperature sensors 1611 and 1612 are not essential components of the radio wave emission device 11. The non-reciprocal circuit 122, the terminator 132, the couplers 1421 and 1422, the detection circuit 152, and the temperature sensors 1621 and 1622 are not essential components of the extended emission device 12.

[0227] In one modified example, the radio wave emitting device 11 and the extended radiating device 12 may communicate with each other. As an example, a communication path may be formed between the fourth communication terminal 812 of the first communication unit 81 of the radio wave emitting device 11 and the sixth communication terminal 822 of the second communication unit 82 of the extended radiating device 12.

[0228] [3. Aspects] As is clear from the above-described first to fifth embodiments and the modifications, the present disclosure includes the following aspects.

[0229] [Aspect 1] A radio wave emission device comprising: a signal generating unit that generates a plurality of high frequency signals; a first radio wave emission unit that can emit a first radio wave based on a first high frequency signal of the plurality of high frequency signals; an output unit having one or more output terminals connectable to a coaxial cable and outputting one or more second high frequency signals of the plurality of high frequency signals from one or more second output terminals of the one or more output terminals; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls emission of the first radio wave in accordance with a first communication signal received through the first communication unit; and a first casing that accommodates at least a part of the signal generating unit, the first radio wave emission unit, the output unit, the first communication unit, and the first control unit; a second radio wave emitting unit that can radiate a second radio wave based on the second high-frequency signal input to the second input unit; a second communication unit having one or more second communication terminals connectable to a communication cable; a second control unit that controls the radiation of the second radio wave in accordance with the second communication signal received through the second communication unit; and a second casing that accommodates the second input unit, the second radio wave emitting unit, the second communication unit, and the second control unit, wherein in the first casing, the first radio wave emitting unit is arranged in a different orientation from the one or more output terminals and the one or more first communication terminals, and in the second casing, the second radio wave emitting unit is arranged in a different orientation from the second input unit and the one or more second communication terminals.

[0230] [Aspect 2] The radio wave radiation system of Aspect 1, wherein the one or more output terminals are arranged in the first casing in a different orientation from the one or more first communication terminals.

[0231] [Aspect 3] The radio wave radiation system of Aspect 2, wherein the one or more first communication terminals include a third communication terminal and a fourth communication terminal having different communication standards, and the third communication terminal and the fourth communication terminal are arranged in different orientations in the first casing.

[0232] [Aspect 4] The radio wave emission system of any one of Aspects 1 to 3, wherein the first communication unit includes a first synchronization terminal, the second communication unit includes a second synchronization terminal, the first control unit performs an operation based on a synchronization signal and outputs the synchronization signal from the first synchronization terminal to the second synchronization terminal, and the second control unit performs an operation based on the synchronization signal received via the second synchronization terminal.

[0233] [Aspect 5] The radio wave emission system of any one of Aspects 1 to 3, wherein the first communication unit includes a first synchronization terminal, the second communication unit includes a second synchronization terminal, the first control unit performs an operation based on a synchronization signal received through the first synchronization terminal, and the second control unit performs an operation based on the synchronization signal received through the second synchronization terminal.

[0234] [Aspect 6] The radio wave radiation system of any one of Aspects 1 to 5, wherein the radio wave radiation device further comprises a first power input section having one or more first power terminals connectable to a power cable, and in the first casing, the one or more first power terminals are arranged in a different orientation from at least one of the first radio wave radiation section or the one or more output terminals.

[0235] [Aspect 7] The radio wave emission system of Aspect 6, wherein the radio wave emission device further comprises: a first signal amplifier that amplifies the first high-frequency signal; and a first high-frequency filter that reduces high-frequency signals corresponding to the frequency bands of the first high-frequency signal and the one or more second high-frequency signals, wherein the first radio wave emission unit is capable of emitting the first radio wave based on the first high-frequency signal amplified by the first signal amplifier, and the first high-frequency filter is connected to at least one of the one or more first power supply terminals that is used to supply power to the signal generation unit or the first signal amplifier.

[0236] [Aspect 8] The radio wave radiation system of Aspect 4 or 5, wherein the first casing has a first top wall, a first bottom wall, and a first side wall, wherein the first side wall includes a first wall portion and a second wall portion that are on opposite sides in a first direction, and a third wall portion and a fourth wall portion that are on opposite sides in a second direction that intersects with the first direction, wherein the first radio wave radiation portion is located in the first wall portion, wherein the one or more output terminals are located in the third wall portion, and wherein the one or more first communication terminals are located in at least one of the second wall portion and the fourth wall portion.

[0237] [Aspect 9] The radio wave emission system of Aspect 8, wherein within the first casing, the first control unit and the first communication unit are located on the fourth wall side, the output unit is located on the third wall side, and the first radio wave emission unit is located between the first control unit and the first communication unit and the output unit in the second direction.

[0238] [Aspect 10] The radio wave radiation system of Aspect 9, wherein a first shield is disposed within the first casing at least partially between the first control unit and the first communication unit and the first radio wave radiation unit, and a second shield is disposed within the first casing at least partially between the output unit and the first radio wave radiation unit.

[0239] [Aspect 11] The radio wave emission system of Aspect 9 or 10, wherein the radio wave emission device comprises: a first adjustment unit that adjusts the first high-frequency signal with respect to at least one of phase and power; and a first signal amplification unit that amplifies the first high-frequency signal adjusted by the first adjustment unit; the first radio wave emission unit enables the first radio wave to be emitted based on the first high-frequency signal amplified by the first signal amplification unit; and the first adjustment unit and the first signal amplification unit, together with the first radio wave emission unit, are located between the first control unit and the first communication unit and the output unit in the second direction.

[0240] [Aspect 12] The radio wave emission system according to any one of Aspects 1 to 11, wherein in the second casing, the second input section is arranged in a different orientation from the one or more second communication terminals.

[0241] [Aspect 13] The radio wave radiation system of Aspect 12, wherein the one or more second communication terminals include a fifth communication terminal and a sixth communication terminal having different communication standards, and the fifth communication terminal and the sixth communication terminal are arranged in different orientations in the second casing.

[0242] [Aspect 14] The radio wave radiation system of any one of Aspects 1 to 13, wherein each of the one or more extended radiation devices further comprises a second power input section having one or more second power terminals connectable to a power cable, and in the second casing, the one or more second power terminals are arranged in a different orientation from at least one of the second radio wave radiation section or the second input section.

[0243] [Aspect 15] The radio wave radiation system of Aspect 14, wherein each of the one or more extended radiation devices further includes: a second signal amplifier that amplifies the second high-frequency signal; and a second high-frequency filter that reduces high-frequency signals corresponding to frequency bands of the first high-frequency signal and the one or more second high-frequency signals, wherein the second radio wave radiation unit enables the second radio wave to be radiated based on the second high-frequency signal amplified by the second signal amplifier, and the second high-frequency filter is connected to at least one second power supply terminal, of the one or more second power supply terminals, that is used to supply power to the second signal amplifier.

[0244] [Aspect 16] The radio wave radiation system of Aspect 12 or 13, wherein the second casing has a second top wall, a second bottom wall, and a second side wall, wherein the second side wall includes a fifth wall portion and a sixth wall portion that are on opposite sides in a third direction, and a seventh wall portion and an eighth wall portion that are on opposite sides in a fourth direction that intersects with the third direction, wherein the second radio wave radiation portion is located in the fifth wall portion, the second input portion is located in the seventh wall portion, and the one or more second communication terminals are located in at least one of the sixth wall portion and the eighth wall portion.

[0245] [Aspect 17] The radio wave emission system of Aspect 16, wherein, within the second casing, the second control unit and the second communication unit are located on the eighth wall side, the second input unit is located on the seventh wall side, and the second radio wave emission unit is located between the second control unit and the second communication unit and the second input unit in the fourth direction.

[0246] [Aspect 18] The radio wave emission system of Aspect 17, wherein a third shield is disposed within the second casing at least partially between the second control unit and the second communication unit and the second radio wave emission unit, and a fourth shield is disposed within the second casing at least partially between the second input unit and the second radio wave emission unit.

[0247] [Aspect 19] The radio wave radiation system of Aspect 17 or 18, wherein each of the one or more extended radiation devices comprises: a second adjustment unit that adjusts the second high-frequency signal input to the second input unit in terms of at least one of phase and power; and a second signal amplification unit that amplifies the second high-frequency signal adjusted by the second adjustment unit, wherein the second radio wave radiation unit is capable of radiating a second radio wave based on the second high-frequency signal amplified by the second signal amplification unit, and the second adjustment unit and the second signal amplification unit, together with the second radio wave radiation unit, are located between the second control unit and the second communication unit and the second input unit in the fourth direction.

[0248] [Aspect 20] A radio wave radiation device to which one or more extended radiation devices can be connected, comprising: a signal generating unit that generates a plurality of high frequency signals; a first radio wave radiation unit that can radiate a first radio wave based on a first high frequency signal of the plurality of high frequency signals; an output unit having one or more output terminals connectable to a coaxial cable and outputting one or more second high frequency signals of the plurality of high frequency signals from one or more second output terminals of the one or more output terminals; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls radiation of the first radio wave in accordance with a first communication signal received through the first communication unit; and a first casing that accommodates at least a part of the signal generating unit, the first radio wave radiation unit, the output unit, the first communication unit, and the first control unit, wherein each of the one or more extended radiation devices has: a second input unit that is connected to one of the one or more second output terminals via a coaxial cable and that receives as input one of the one or more second high frequency signals; a second radio wave emitting unit that can radiate a second radio wave based on the second high-frequency signal input to the second input unit, wherein in the first casing, the first radio wave emitting unit is arranged in a different orientation from the one or more output terminals and the one or more first communication terminals.

[0249] [Aspect 21] A radio wave emission device comprising: a radio wave emission device; and one or more extended radiation devices, wherein the radio wave emission device comprises: a signal generation unit that generates a plurality of high frequency signals; a first radio wave emission unit that can emit a first radio wave based on a first high frequency signal of the plurality of high frequency signals; an output unit having one or more output terminals connectable to a coaxial cable and outputting one or more second high frequency signals of the plurality of high frequency signals from one or more second output terminals of the one or more output terminals, respectively; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls emission of the first radio wave in accordance with a first communication signal received through the first communication unit; and a first abnormality detection unit that detects a first index value of an abnormality in the radio wave emission device, wherein each of the one or more extended radiation devices comprises: a second input unit that is connected to one of the one or more second output terminals via a coaxial cable and to which one of the one or more second high frequency signals is input; and a second radio wave emission unit that can emit a second radio wave based on the second high frequency signal input to the second input unit. a second communication unit having one or more second communication terminals connectable to a communication cable; a second control unit that controls radiation of the second radio waves in response to a second communication signal received through the second communication unit; and a second abnormality detection unit that detects a second index value of an abnormality of the extended radiation devices, wherein the first control unit transmits a first abnormality signal through the first communication unit when the first index value detected by the first abnormality detection unit exceeds a first threshold, and at least one of the second control units that receive the first abnormality signal stops or reduces radio wave radiation, and the second control unit transmits a second abnormality signal through the second communication unit when the second index value detected by the second abnormality detection unit exceeds a second threshold, and at least one of the first control unit of the radio wave radiation device that receives the second abnormality signal and the second control unit of one or more extended radiation devices that receives the second abnormality signal stops or reduces radio wave radiation.

[0250] [Aspect 22] The radio wave emission system of Aspect 21, wherein the first control unit stops or reduces radio wave emission when the first index value detected by the first abnormality detection unit exceeds the first threshold value.

[0251] [Aspect 23] The radio wave emission system of Aspect 21 or 22, wherein the second control unit stops or reduces radio wave emission when the second index value detected by the second abnormality detection unit exceeds the second threshold value.

[0252] [Aspect 24] The radio wave emission system of Aspect 21, wherein the first anomaly detection unit includes a detection circuit that measures the power of a reflected wave of the first radio wave as the first index value.

[0253] [Aspect 25] The radio wave emission system of Aspect 21, wherein the first abnormality detection unit includes a temperature sensor that measures a temperature of the radio wave emission device as the first index value.

[0254] [Aspect 26] The radio wave emission system of Aspect 25, wherein the radio wave emission device includes a terminator that consumes reflected waves of the first radio wave as heat, and the temperature sensor measures a temperature of the terminator.

[0255] [Aspect 27] The radio wave emission system of Aspect 21, wherein the second anomaly detection unit includes a detection circuit that measures the power of a reflected wave of the second radio wave as the second index value.

[0256] [Aspect 28] The radio wave emission system of Aspect 21, wherein the second anomaly detection unit includes a temperature sensor that measures a temperature of the extended emission device as the second index value.

[0257] [Aspect 29] The radio wave radiation system of Aspect 28, wherein each of the one or more extended radiation devices includes a termination that consumes reflected waves of the second radio waves as heat, and the temperature sensor measures a temperature of the termination.

[0258] Aspects 2 to 17 are optional elements and are not essential. Aspects 2 to 17 can be appropriately combined with Aspect 18.

[0259] The present disclosure is applicable to radio wave emitting systems and radio wave emitting devices, particularly to radio wave emitting systems that emit multiple radio waves, and to radio wave emitting devices that constitute a radio wave emitting system or that can be used independently.

[0260] REFERENCE SIGNS LIST 1 Radio wave radiation system 11 Radio wave radiation device 12 Extended radiation device 2 Signal generation unit 31 First adjustment unit 32 Second adjustment unit 41 First signal amplification unit 42 Second signal amplification unit 51 First radio wave radiation unit 52 Second radio wave radiation unit 61 Output unit 611 Output terminal 72 Second input unit 81 First communication unit 811 First communication terminal (third communication terminal) 812 First communication terminal (fourth communication terminal) 82 Second communication unit 821 Second communication terminal (fifth communication terminal) 822 Second communication terminal (sixth communication terminal) 91 First control unit 92 Second control unit 101 First power supply input unit 1011 First power supply terminal (third power supply terminal) 1012 First power supply terminal (fourth power supply terminal) 102 Second power supply input unit 1021 Second power supply terminal (fifth power supply terminal) 1022 DESCRIPTION OF SYMBOLS Second power supply terminal (sixth power supply terminal) 111 First high frequency filter 112 Second high frequency filter 151 Detection circuit (first abnormality detection unit) 152 Detection circuit (second abnormality detection unit) 1611, 1612 Temperature sensor (first abnormality detection unit) 1621, 1622 Temperature sensor (second abnormality detection unit) 210 First casing 211 First upper wall 212 First bottom wall 213 First side wall 213a First wall portion 213b Second wall portion 213c Third wall portion 213d Fourth wall portion 214 First shield 215 Second shield 220 Second casing 221 Second upper wall 222 Second bottom wall 223 Second side wall 223a Fifth wall portion 223b Sixth wall portion 223c Seventh wall portion 223d Eighth wall portion 224 Third Shield 225 Fourth Shield

Claims

1. A radio wave emitting device comprising: a radio wave emitting device; and one or more extended radiating devices, wherein the radio wave emitting device comprises: a signal generating unit that generates a plurality of high frequency signals; a first radio wave emitting unit that can radiate a first radio wave based on a first high frequency signal of the plurality of high frequency signals; an output unit having one or more output terminals connectable to a coaxial cable, and outputting one or more second high frequency signals of the plurality of high frequency signals from one or more second output terminals of the one or more output terminals, respectively; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls radiation of the first radio wave in accordance with a first communication signal received through the first communication unit; and a first casing that accommodates at least a part of the signal generating unit, the first radio wave emitting unit, the output unit, the first communication unit, and the first control unit, wherein each of the one or more extended radiating devices comprises: a second input unit that is connected to one of the one or more second output terminals via a coaxial cable, and to which one of the one or more second high frequency signals is input; a second radio wave emitting unit that can radiate a second radio wave based on the second high-frequency signal input to the second input unit; a second communication unit having one or more second communication terminals connectable to a communication cable; a second control unit that controls the radiation of the second radio wave in accordance with the second communication signal received through the second communication unit; and a second casing that accommodates the second input unit, the second radio wave emitting unit, the second communication unit, and the second control unit, wherein in the first casing, the first radio wave emitting unit is arranged in a different orientation from the one or more output terminals and the one or more first communication terminals, and in the second casing, the second radio wave emitting unit is arranged in a different orientation from the second input unit and the one or more second communication terminals.

2. The radio wave radiation system according to claim 1, wherein in the first casing, the one or more output terminals are arranged in a different orientation from the one or more first communication terminals.

3. The radio wave radiation system of claim 2, wherein the one or more first communication terminals include a third communication terminal and a fourth communication terminal having different communication standards, and the third communication terminal and the fourth communication terminal are arranged in different orientations in the first casing.

4. The radio wave emission system of claim 1, wherein the first communication unit includes a first synchronization terminal, the second communication unit includes a second synchronization terminal, the first control unit performs operations based on a synchronization signal and outputs the synchronization signal from the first synchronization terminal to the second synchronization terminal, and the second control unit performs operations based on the synchronization signal received through the second synchronization terminal.

5. The radio wave radiation system of claim 1, wherein the first communication unit includes a first synchronization terminal, the second communication unit includes a second synchronization terminal, the first control unit performs an operation based on a synchronization signal received through the first synchronization terminal, and the second control unit performs an operation based on the synchronization signal received through the second synchronization terminal.

6. The radio wave radiation system of claim 1, wherein the radio wave radiation device further comprises a first power input section having one or more first power terminals connectable to a power cable, and in the first casing, the one or more first power terminals are arranged in a different orientation from at least one of the first radio wave radiation section or the one or more output terminals.

7. The radio wave radiation system of claim 6, wherein the radio wave radiation device further comprises: a first signal amplifier that amplifies the first high-frequency signal; and a first high-frequency filter that reduces high-frequency signals corresponding to the frequency bands of the first high-frequency signal and the one or more second high-frequency signals; the first radio wave radiation unit enables the first radio wave to be radiated based on the first high-frequency signal amplified by the first signal amplifier; and the first high-frequency filter is connected to at least one of the one or more first power supply terminals that is used to supply power to the signal generating unit or the first signal amplifier.

8. The radio wave radiation system of claim 2, wherein the first casing has a first top wall, a first bottom wall, and a first side wall, the first side wall including a first wall portion and a second wall portion on opposite sides in a first direction, and a third wall portion and a fourth wall portion on opposite sides in a second direction intersecting the first direction, the first radio wave radiation portion being located in the first wall portion, the one or more output terminals being located in the third wall portion, and the one or more first communication terminals being located in at least one of the second wall portion and the fourth wall portion.

9. The radio wave emission system of claim 8, wherein within the first casing, the first control unit and the first communication unit are located on the fourth wall side, the output unit is located on the third wall side, and the first radio wave emission unit is located between the first control unit and the first communication unit and the output unit in the second direction.

10. The radio wave radiation system of claim 9, wherein a first shield is arranged within the first casing at least partially between the first control unit and the first communication unit and the first radio wave radiation unit, and a second shield is arranged within the first casing at least partially between the output unit and the first radio wave radiation unit.

11. The radio wave radiation system of claim 9 or 10, wherein the radio wave radiation device comprises: a first adjustment unit that adjusts the first high-frequency signal with respect to at least one of phase and power; and a first signal amplification unit that amplifies the first high-frequency signal adjusted by the first adjustment unit; the first radio wave radiation unit enables the first radio wave to be radiated based on the first high-frequency signal amplified by the first signal amplification unit; and the first adjustment unit and the first signal amplification unit, together with the first radio wave radiation unit, are located between the first control unit and the first communication unit and the output unit in the second direction.

12. The radio wave radiation system according to claim 1, wherein in the second casing, the second input section is arranged in a different orientation from the one or more second communication terminals.

13. The radio wave radiation system of claim 12, wherein the one or more second communication terminals include a fifth communication terminal and a sixth communication terminal having different communication standards, and the fifth communication terminal and the sixth communication terminal are arranged in different orientations in the second casing.

14. The radio wave radiation system of claim 1, wherein each of the one or more extended radiation devices further comprises a second power input section having one or more second power terminals connectable to a power cable, and in the second casing, the one or more second power terminals are arranged in a different orientation from at least one of the second radio wave radiation section or the second input section.

15. The radio wave radiation system of claim 14, wherein each of the one or more extended radiation devices further comprises: a second signal amplifier section that amplifies the second high-frequency signal; and a second high-frequency filter that reduces high-frequency signals corresponding to the frequency bands of the first high-frequency signal and the one or more second high-frequency signals; the second radio wave radiation section enables the second radio wave to be radiated based on the second high-frequency signal amplified by the second signal amplifier section; and the second high-frequency filter is connected to at least one second power supply terminal, of the one or more second power supply terminals, that is used to supply power to the second signal amplifier section.

16. The radio wave radiation system of claim 11, wherein the second casing has a second top wall, a second bottom wall, and a second side wall, the second side wall including a fifth wall portion and a sixth wall portion on opposite sides in a third direction, and a seventh wall portion and an eighth wall portion on opposite sides in a fourth direction intersecting the third direction, the second radio wave radiation portion being located in the fifth wall portion, the second input portion being located in the seventh wall portion, and the one or more second communication terminals being located in at least one of the sixth wall portion and the eighth wall portion.

17. The radio wave emission system of claim 16, wherein within the second casing, the second control unit and the second communication unit are located on the eighth wall side, the second input unit is located on the seventh wall side, and the second radio wave emission unit is located between the second control unit and the second communication unit and the second input unit in the fourth direction.

18. The radio wave radiation system of claim 17, wherein a third shield is arranged within the second casing at least partially between the second control unit and the second communication unit and the second radio wave radiation unit, and a fourth shield is arranged within the second casing at least partially between the second input unit and the second radio wave radiation unit.

19. The radio wave radiation system of claim 17, wherein each of the one or more extended radiation devices comprises: a second adjustment unit that adjusts the second high-frequency signal input to the second input unit in terms of at least one of phase and power; and a second signal amplification unit that amplifies the second high-frequency signal adjusted by the second adjustment unit; the second radio wave radiation unit is capable of radiating a second radio wave based on the second high-frequency signal amplified by the second signal amplification unit; and the second adjustment unit and the second signal amplification unit, together with the second radio wave radiation unit, are located between the second control unit and the second communication unit and the second input unit in the fourth direction.

20. A radio wave radiation device to which one or more extended radiation devices can be connected, comprising: a signal generating unit that generates a plurality of high frequency signals; a first radio wave radiation unit that can radiate a first radio wave based on a first high frequency signal among the plurality of high frequency signals; an output unit having one or more output terminals connectable to a coaxial cable and outputting one or more second high frequency signals among the plurality of high frequency signals from one or more second output terminals among the one or more output terminals; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls radiation of the first radio wave in accordance with a first communication signal received through the first communication unit; and a first casing that accommodates at least a part of the signal generating unit, the first radio wave radiation unit, the output unit, the first communication unit, and the first control unit, wherein each of the one or more extended radiation devices has a second input unit that is connected to one of the one or more second output terminals via a coaxial cable and to which one of the one or more second high frequency signals is input, a second radio wave emitting unit that can radiate a second radio wave based on the second high-frequency signal input to the second input unit, wherein in the first casing, the first radio wave emitting unit is arranged in a different orientation from the one or more output terminals and the one or more first communication terminals.

21. A radio wave emitting device comprising: a radio wave emitting device; and one or more extended radiating devices, wherein the radio wave emitting device comprises: a signal generating unit that generates a plurality of high frequency signals; a first radio wave emitting unit that can radiate a first radio wave based on a first high frequency signal of the plurality of high frequency signals; an output unit having one or more output terminals connectable to a coaxial cable and outputting one or more second high frequency signals of the plurality of high frequency signals from one or more second output terminals of the one or more output terminals, respectively; a first communication unit having one or more first communication terminals connectable to a communication cable; a first control unit that controls the radiation of the first radio wave in accordance with a first communication signal received through the first communication unit; and a first abnormality detection unit that detects a first index value of an abnormality in the radio wave emitting device, wherein each of the one or more extended radiating devices comprises: a second input unit that is connected to one of the one or more second output terminals via a coaxial cable and to which one of the one or more second high frequency signals is input; and a second radio wave emitting unit that can radiate a second radio wave based on the second high frequency signal input to the second input unit. a second communication unit having one or more second communication terminals connectable to a communication cable; a second control unit that controls radiation of the second radio waves in response to a second communication signal received through the second communication unit; and a second abnormality detection unit that detects a second index value of an abnormality of the extended radiation devices, wherein the first control unit transmits a first abnormality signal through the first communication unit when the first index value detected by the first abnormality detection unit exceeds a first threshold, and at least one of the second control units that receive the first abnormality signal stops or reduces radio wave radiation, and the second control unit transmits a second abnormality signal through the second communication unit when the second index value detected by the second abnormality detection unit exceeds a second threshold, and at least one of the first control unit of the radio wave radiation device that receives the second abnormality signal and the second control unit of one or more extended radiation devices that receives the second abnormality signal stops or reduces radio wave radiation.

22. The radio wave emission system according to claim 21, wherein the first control unit stops or reduces radio wave emission when the first index value detected by the first abnormality detection unit exceeds the first threshold value.

23. The radio wave emission system of claim 21 or 22, wherein the second control unit stops or reduces radio wave emission when the second index value detected by the second abnormality detection unit exceeds the second threshold value.

24. The radio wave emission system according to claim 21, wherein the first anomaly detection unit includes a detection circuit that measures the power of a reflected wave of the first radio wave as the first index value.

25. The radio wave emission system according to claim 21, wherein the first abnormality detection unit includes a temperature sensor that measures the temperature of the radio wave emission device as the first index value.

26. The radio wave radiation system according to claim 25, wherein the radio wave radiation device comprises a terminator that consumes the reflected wave of the first radio wave as heat, and the temperature sensor measures the temperature of the terminator.

27. The radio wave emission system according to claim 21, wherein the second anomaly detection unit includes a detection circuit that measures the power of a reflected wave of the second radio wave as the second index value.

28. The radio wave emission system according to claim 21, wherein the second abnormality detection unit includes a temperature sensor that measures the temperature of the extended emission device as the second index value.

29. The radio wave radiation system of claim 28, wherein each of the one or more extended radiation devices includes a termination that consumes the reflected wave of the second radio wave as heat, and the temperature sensor measures the temperature of the termination.

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