Wireless communication signal distribution device, communication system

Abstract

To provide a wireless communication signal distribution device that can easily expand the number of signals distributed. [Solution] The wireless communication signal distribution device of the present invention comprises a transmission path for transmitting a first signal, and a plurality of resonators that are not in contact with the transmission path and are spaced apart along the transmission direction of the first signal, and that resonate at the frequency of the first signal, thereby exciting a second signal that has the same frequency as the first signal. The resonators are composed of conductors having a length that causes resonance at the frequency of the first signal.

Description

Technical Field

[0001] The present invention relates to a wireless communication signal distribution device for distributing signals and a communication system.

Background Art

[0002] In recent years, with the spread of video services, research on mobile communication systems capable of transmitting large-capacity data at high speed has been actively conducted. In order to transmit large-capacity data to communication terminals of many users without delay, it is preferable to transmit the large-capacity data from a plurality of antennas to the communication terminals of many users. As a prerequisite, it is necessary to convert the large-capacity data into microwaves, distribute it to a plurality of antennas, and output it. In order to distribute microwaves, a strip-shaped dielectric substrate having conductor patterns formed on both sides is arranged on a dielectric substrate on which an input line composed of a first microstrip line and two output lines composed of a second and a third microstrip line are formed. One surface of one end of the strip-shaped dielectric substrate is connected to one end of the input line (the first microstrip line), one surface of the other end is connected to one end of one output line (the second microstrip line), and the other surface of the other end is connected to the other output line (the third microstrip line). A microwave divider has been proposed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above microwave divider divides the microwave output from the input line into two. Therefore, when it is desired to divide the microwave into three or more, the microwave dividers must be connected in multiple stages.

[0005] In view of these circumstances, the present invention aims to provide a wireless communication signal distribution device that can easily expand the number of signals distributed, and a communication system using the wireless communication signal distribution device. [Means for solving the problem]

[0006] The wireless communication signal distribution device of the present invention is characterized by comprising: a transmission path for transmitting a first signal; and a plurality of resonators that are not in contact with the transmission path and are spaced apart along the transmission direction of the first signal, and that resonate at the frequency of the first signal, thereby exciting a second signal that has the same frequency as the first signal.

[0007] The present invention relates to a signal distribution device for wireless communication, characterized in that the resonator is composed of a conductor having a length that causes resonance at the frequency of the first signal.

[0008] In the wireless communication signal distribution device of the present invention, the conductor is characterized in that it is an open ring shape.

[0009] The present invention provides a signal distribution device for wireless communication, characterized in that it includes a second transmission path connected to the conductor at a position offset from the center of the conductor in the longitudinal direction toward the end, and which leads the second signal out from the resonator to the outside.

[0010] The wireless communication signal distribution device of the present invention is further characterized in that an electromagnetic shielding layer made of a material that blocks electric and / or magnetic fields, and an air layer are arranged between the resonator and the transmission line, and an unshielded region is formed in the electromagnetic shielding layer that transmits electric and / or magnetic fields from the transmission line to the resonator.

[0011] The wireless communication signal distribution device of the present invention further comprises a communication module having a second transmission path connected to the resonator and leading the second signal out of the resonator to the outside, a mixer connected to the second transmission path, an RF signal transmission path connected to the mixer for transmitting an RF signal, an IF signal transmission path connected to the mixer for transmitting an IF signal, and a housing that accommodates at least the resonator, the second transmission path, the mixer, the RF signal transmission path, and the IF signal transmission path, wherein the mixer generates the RF signal by mixing the second signal and the IF signal, or generates the IF signal by mixing the second signal and the RF signal, and a plurality of the communication modules are arranged in parallel along the transmission path.

[0012] The communication system of the present invention is characterized by comprising the above-mentioned wireless communication signal distribution device, an IF signal device that transmits or receives the IF signal to each of the plurality of communication modules, and a plurality of antennas connected to each of the plurality of communication modules that transmit or receive the RF signal. [Effects of the Invention]

[0013] The wireless communication signal distribution device of the present invention has the excellent effect of easily expanding the number of signals that can be distributed. [Brief explanation of the drawing]

[0014] [Figure 1] (A) is a diagram showing an overview of a communication system in an embodiment of the present invention. (B) is a diagram showing an example of the configuration of a computer used in the same communication system. [Figure 2] This figure shows an example of the configuration of the transmitting unit and transmitting antenna group of the communication system. [Figure 3] (A) is a diagram showing an example of the reference signal transmission path and resonant section of the transmitter in the same communication system. (B) is a diagram showing another example of the reference signal transmission path and resonant section of the transmitter in the same communication system. [Figure 4]FIG. is an example of waveforms of current and voltage of an RF signal excited by resonance in a resonance part in the communication system, where (A) shows the case where both ends of the resonance part are open, (B) shows the case where both ends of the resonance part are grounded, and (C) shows the case where one end of the resonance part is grounded and the other end is open. [Figure 5] FIG. shows another example of a reference signal transmission path and a resonance part in a transmission part in the communication system. [Figure 6] FIG. shows a modified example of the configuration of a transmission part and a transmission antenna group in the communication system. [Figure 7] (A) is a cross-sectional view of a part of the transmission part in the communication system cut along the length direction (extension direction) of the reference signal transmission path. (B) is a cross-sectional view of a part of the transmission part in the communication system cut along a direction orthogonal to the length direction (extension direction) of the reference signal transmission path. (C) is a plan view of a part of the transmission part in the communication system viewed from a direction orthogonal to the length direction (extension direction) of the reference signal transmission path. [Figure 8] (A) is a front view showing the internal configuration of the transmission part in the communication system. (A) is a side view showing the internal configuration of the transmission part in the communication system. [Figure 9] FIG. shows an example of the configuration of a receiving module in a receiving part of the communication system. [Figure 10] FIG. shows an example of the configuration of a transceiver module in the communication system.

BEST MODE FOR CARRYING OUT THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The accompanying drawings are an example of the embodiments for carrying out the invention, and in the drawings, parts denoted by the same reference numerals represent the same objects.

[0016] <Overall Configuration> The communication system 1 in the embodiment of the present invention will be described. As shown in Fig. 1(A), the communication system 1 in this embodiment is, for example, a wireless communication system that transmits radio waves to user terminals U1 to Un or receives radio waves from user terminals U1 to Un. The communication system 1 in this embodiment is configured, for example, using software-defined radio (SDR). As shown in Fig. 1(A), the communication system 1 in this embodiment includes, for example, an information processing unit 2, a receiving-side SDR unit 3A, a transmitting-side SDR unit 3B, a receiving unit 4 having a plurality of receiving modules 49, a transmitting unit 5 having a plurality of transmitting modules 59, a receiving antenna group 6A including a plurality of receiving antennas 60A connected to each of the plurality of receiving modules 49, and a transmitting antenna group 6B having a plurality of transmitting antennas 60B connected to each of the plurality of transmitting modules 59.

[0017] <Information processing unit> The information processing unit 2 virtually generates a digital communication signal (hereinafter, appropriately referred to as a digital communication signal) including information to be transmitted to user terminals U1 to Un and outputs it to the transmitting-side SDR unit 3B. Further, the information processing unit 2 performs predetermined processing on the digital communication signal received by the receiving antenna group 6A and input via the receiving unit 4 and the receiving-side SDR unit 3A. For example, software such as MATLAB (registered trademark) can be used for generating communication signals and the like.

[0018] Then, in the information processing unit 2, processing such as modulation / demodulation, encoding / decoding, and communication protocol control of the digital communication signal is performed. For example, the digital communication signal output from the information processing unit 2 to the transmitting-side SDR unit 3B is subjected to modulation processing, and the digital communication signal output from the receiving-side SDR unit 3A to the information processing unit 2 is subjected to demodulation processing.

[0019] Furthermore, the information processing unit 2 can generate multiple digital communication signals with different phases or frequencies corresponding to multiple user terminals U1 to Un, and output a superimposed digital communication signal to the transmitting SDR unit 3B. When superimposing multiple signals with different beam directions (transmission directions), it is preferable that the multiple signals each have different frequencies and that phase adjustment is performed according to each beam direction (transmission direction). In this embodiment, the case in which the information processing unit 2 generates a virtual communication signal (a communication signal for simulation) is illustrated, but the present invention is not limited thereto, and the desired communication signal may be generated by a microphone or other external communication device, in which case the information processing unit 2 may be omitted.

[0020] As shown in Figure 1(B), the information processing unit 2 is composed of, for example, a computer (electronic computer) 100. The computer 100 includes a CPU (central processing unit) 110 on which various programs such as MATLAB® are executed, a memory 120 for temporarily expanding information required by the CPU 110, an information storage medium 130 on which programs and various data are stored, and a communication interface 140 for communicating with the outside via wired or wireless means. The information storage medium 130 consists of a hard disk, rewritable non-volatile memory, a large-capacity storage medium such as an HDD (Hard Disk Drive) or SSD (Solid State Drive). The communication interface 140 is a standard that enables the transmission and reception of digital communication signals between the receiving SDR unit 3A and the transmitting SDR unit 3B.

[0021] <Receiver-side SDR unit, Transmitter-side SDR unit> The receiving SDR unit 3A receives the analog communication signal with the receiving antenna group 6A and converts it to a digital communication signal, which is then output to the information processing unit 2. The transmitting SDR unit 3B converts the digital communication signal output from the information processing unit 2 to an analog communication signal (hereinafter referred to as an analog communication signal as appropriate) and outputs it to the transmitting unit 5. When the transmitting SDR unit 3B is configured to process the superimposed digital communication signal, it has multiple output ports. The transmitting SDR unit 3B converts each digital communication signal included in the superimposed digital communication signal to an analog communication signal (IF signal) and outputs each analog communication signal (IF signal) from each output port.

[0022] In this example, the receiving SDR unit 3A and the transmitting SDR unit 3B perform analog-to-digital signal conversion by software processing. However, the present invention is not limited to this, and signal processing may be performed by combining components such as mixers, filters, amplifiers, modulators, and demodulators. In other words, the receiving SDR unit 3A and the transmitting SDR unit 3B function as analog-to-digital conversion processing units. Furthermore, the receiving SDR unit 3A and the transmitting SDR unit 3B can also be configured as separate transmitting and receiving SDR units.

[0023] <Transmission section> Referring to Figures 1 and 2, the transmitting unit 5 will be described below. The transmitting unit 5 converts the analog communication signal output from the transmitting SDR unit 3B into a high-frequency RF (Radio Frequency) signal (communication signal) and outputs it to the transmitting antenna group 6B. The RF signal is then transmitted from the transmitting antenna group 6B to one or more user terminals U1 to Un. The RF signal is a high-frequency communication signal, and its frequency is preferably 10 GHz or higher, and more preferably 100 GHz or lower.

[0024] As shown in Figure 2(A), the transmitting unit 5 includes a power supply unit 50, a power supply line 50A, a reference signal source 51, a first reference signal transmission line (first transmission line: the same applies hereinafter) 53, and a plurality of transmitting modules 59.

[0025] <Power supply section> The power supply unit 50 supplies power to the transmitting module 59 and other components via the power supply path 50A. The power supply path 50A extends in a linear fashion parallel to the first reference signal transmission path 53. The power supply unit 50 also supplies power to the reference signal source 51.

[0026] As shown in Figure 6, an extension unit (extension terminal) 50B is provided at the end of the power supply line 50A. When another power supply line 50C is connected to the extension unit (extension terminal) 50B, power from the power supply unit 50 is also supplied to that other power supply line 50C. This effectively makes it possible to extend the power supply line 50A. If no additional wiring is connected to the extension unit (extension terminal) 50B, a termination connector 50D is connected to the extension unit (extension terminal) 50B.

[0027] <Reference signal source> The reference signal source 51 is a so-called frequency synthesizer and generates a reference signal (first signal: the same applies hereinafter) which serves as the reference frequency for frequency conversion. The reference frequency of the reference signal is preferably 4 GHz or higher, and more preferably 20 GHz or lower. For example, if you want to supply a 27 GHz signal to the mixer via a frequency converter that quadruples the frequency, the frequency of the reference signal is set to 6.75 GHz (27 / 4 GHz). The reference signal generated by the reference signal source 51 is transmitted to the first reference signal transmission line 53. The first reference signal transmission line 53 extends in a straight line in the transmitting unit 5.

[0028] <First Reference Signal Transmission Path> The first reference signal transmission line 53 is composed of a conductor. Preferably, the conductor is configured in a planar shape (flat plate shape) with a predetermined thickness and width such that its characteristic impedance is a specific value (e.g., 50Ω). The first reference signal transmission line 53 has its starting end connected to the output of the reference signal source 51, and a termination (connection terminal) 54 connected to its end. If no additional wiring is connected to the termination 54, a termination connector 54A is connected to the termination 54. This termination connector 54A has a built-in resistor (e.g., a 50Ω resistor) to prevent reflection of the reference signal.

[0029] <Transmitting Module> Referring to Figures 2 and 6, the transmitting module 59 will be described below. The transmitting module 59 includes a resonator 55, a second reference signal transmission path (second transmission path: the same applies hereinafter) 580 connected to the output of the resonator 55, a signal conversion unit 581 connected to the second reference signal transmission path 580 downstream of the resonator 55, an IF signal transmission path 582 whose output is connected to the signal conversion unit 581, an IF terminal 583 connected to the input of the IF signal transmission path 582, an RF signal transmission path 584 whose input is connected to the output of the signal conversion unit 581, an RF terminal 585 connected to the output of the RF signal transmission path 584, and an amplifier 586 provided in the middle of the RF signal transmission path 584 downstream of the signal conversion unit 581. These components and materials of the transmitting module 59 are housed in a housing 56.

[0030] The transmitting module 59 is connected to the transmitting SDR unit 3B via IF wiring 583A, which is connected to the IF terminal 583. One transmitting antenna 60B is connected to the transmitting module 59 via RF wiring 585A, which is connected to the RF terminal 585. Furthermore, the transmitting module 59 is provided with a contact 587 for receiving external power. This contact 587 is connected to the power supply line 50A.

[0031] Multiple transmitting modules 59 are arranged in parallel along the direction in which the first reference signal transmission path 53 extends. As shown in Figure 2, additional transmitting modules 59 can be placed along the first reference signal transmission path 53 if there is available space R around it. Therefore, the transmitting unit 5 in this embodiment has an extremely high expandability specification, as the number of transmitting modules 59 can be freely changed, allowing for easy expansion of the number of signals distributed.

[0032] Furthermore, as shown in Figure 6, an extension transmission line 53A can also be connected by connecting a connecting connector 54B to the termination (connection terminal) 54 of the first reference signal transmission line 53, thereby allowing the first reference signal transmission line 53 to be considered extended. In this case, a transmission module 59 can also be placed in the extended portion of the first reference signal transmission line 53 (extension transmission line 53A), as described above. Note that a termination connector 54A should be connected to the termination (connection terminal) 54 of the extension transmission line 53A.

[0033] <Signal conversion unit> The signal conversion unit 581 uses the reference signal output from the resonator 55 to convert the IF signal output from the transmitting SDR unit 3B into an RF signal. In other words, the signal conversion unit 581 performs frequency conversion on the IF signal and generates an RF signal as a result. The signal conversion unit 581 includes, for example, a frequency converter 581A and a mixer 581B.

[0034] The frequency converter 581A is installed in the middle of the second reference signal transmission line 580, with its input connected to the resonator 55 and its output connected to the mixer 581B. The frequency converter 581A converts the frequency of the reference signal (excitation signal from the resonator 55) transmitted in the second reference signal transmission line 580. Specifically, the frequency converter 581A may be one that converts the frequency of the reference signal (excitation signal from the resonator 55) to four times its original frequency, but it is not limited to this, and the level of increase can be changed as appropriate.

[0035] Mixer 581B has at least two input ports and an output port. One input port of mixer 581B receives the analog communication signal (IF signal) output from the transmitting SDR unit 3B via the IF signal transmission line 582. The other input port of mixer 581B receives the reference signal transmitted from the second reference signal transmission line 580. The reference signal input to mixer 581B has its frequency converted by the frequency converter 581A (for example, by four times). Mixer 581B then multiplies the IF signal and the reference signal to perform frequency conversion to a higher frequency RF signal. The output port of mixer 581B is connected to the RF signal transmission line 584, and mixer 581B outputs the frequency-converted RF signal to the RF signal transmission line 584. For example, if the frequency of the analog communication signal (IF signal) is 1 GHz and the frequency of the reference signal is 27 GHz, the RF signal mixed by the mixer 581B will be 28 GHz.

[0036] Furthermore, if the frequency of the reference signal output from the resonator 55 reaches the desired level, the frequency converter 581A may be omitted.

[0037] <amplifier> The amplifier 586, located in the middle of the RF signal transmission line 584, amplifies the RF signal output from the signal conversion unit 581 (mixer 581B). However, if the RF signal output from the mixer 581B has reached the desired level, the amplifier 586 may be omitted.

[0038] <Transmission path within the transmission module> The second reference signal transmission path 580, the IF signal transmission path 582, and the RF signal transmission path 584 within the transmitting module 59 are composed of conductors. Preferably, these conductors are configured in a planar (flat) shape with a predetermined thickness and width. Various functional circuits and / or elements such as capacitors and resistors may be interposed in the second reference signal transmission path 580, the IF signal transmission path 582, and the RF signal transmission path 584. For example, in the second reference signal transmission path 580, it is preferable to place a capacitor or the like with a capacitance of a specific threshold (F) or less (e.g., 1 pF or less) between the resonator 55 and the signal conversion unit 581 so as not to weaken the excitation signal of the resonator 55. Any circuits and / or elements provided in these transmission paths are included within the scope of the present invention.

[0039] <Resonator> The resonator 55 will be described below with reference to Figures 2 to 5. The resonator 55 is positioned at a predetermined distance from the first reference signal transmission path 53 so as not to be in contact with the first reference signal transmission path 53. The distance between the resonator 55 and the first reference signal transmission path 53 is assumed to be in the range of 0.1 to 3 (mm), but is not limited to this range, and may be any other distance that produces the resonance phenomenon described below.

[0040] The resonator 55 resonates at the frequency of the reference signal transmitted in the first reference signal transmission line 53. This resonance excites each resonator 55 with a signal having the same frequency as the reference signal (excitation signal (second signal): hereinafter the same). In other words, the reference signal transmitted in the first reference signal transmission line 53 is duplicated in the resonators 55 with the same phase due to the resonance phenomenon. As a result, it can be considered that the reference signal from the first reference signal transmission line 53 is distributed to each resonator 55 of all transmitting modules 59. The excitation signals (second signals) distributed to the multiple resonators 55 have the same phase and are synchronized. Because this embodiment utilizes a signal excitation method based on the resonance phenomenon, the first reference signal transmission line 53 and each resonator 55 are extremely loosely coupled, and the reference signal flowing through the first reference signal transmission line 53 is hardly attenuated, which is an advantage. Furthermore, each resonator 55 replicates the reference signal transmitted in the first reference signal transmission line 53 as an excitation signal (second signal) while amplifying its amplitude, thereby supplying a signal with sufficient voltage amplitude to the downstream side.

[0041] Furthermore, the multiple resonators 55 are arranged at intervals from each other along the length direction (extension direction: transmission direction A) of the first reference signal transmission path 53.

[0042] As shown in Figures 3(A) and (B), the resonator 55 has conductors 55A and 55B having a predetermined length L (hereinafter referred to as resonant conductors). The resonant conductor is preferably composed of a planar (flat plate) conductor (flat plate conductor) having a predetermined thickness and width. Here, the length L of the resonant conductor is defined as the length of the center line F of the resonant conductor extending in a strip shape. The longitudinal direction of the resonant conductor is parallel to the longitudinal direction or extending direction of the resonant conductor. The center line F extends along the longitudinal direction (longitudinal direction or extending direction) of the resonant conductor. The resonant conductor may be a planar conductor extending in a straight line, as shown in Figure 3(A), or a planar conductor extending in an open ring shape (for example, C-shaped), as shown in Figure 3(B). In the following explanation, for convenience, the conductor shown in Figure 3(A) may be referred to as the "straight" resonant conductor 55A, and the conductor shown in Figure 3(B) may be referred to as the "C-shaped" resonant conductor 55B. Furthermore, the second reference signal transmission line 580 is connected to the resonant conductors 55A and 55B.

[0043] The position where the excitation signal is extracted from the resonant conductors 55A and 55B, i.e., the contact position G with the second reference signal transmission line 580, is preferably a position shifted toward both ends of the central position (center: the same applies hereafter) C of the resonant conductor in the longitudinal direction (longitudinal direction or extending direction) of the resonant conductor (see Figure 3). For example, with respect to the length L of the resonant conductors 55A and 55B, it is preferable that the contact position G is in the range of L / 10 ≤ (contact position G) ≤ 2L / 5, starting from both ends.

[0044] The resonant conductors 55A and 55B are excited by an excitation signal (second signal) that has the same frequency as the reference signal due to a resonance phenomenon with the first reference signal transmission line 53. The length L of the resonant conductors 55A and 55B is determined according to the frequency of the signal to be excited in the resonant conductor. In other words, the length L of the resonant conductor can be defined as the length that causes resonance with the reference signal flowing through the first reference signal transmission line 53.

[0045] Furthermore, the resonant conductors 55A and 55B do not have termination resistances because they need to be excited to induce resonance. In other words, the resonant conductors 55A and 55B are either open at both ends, or grounded at both ends, or one end is open and the other end is grounded.

[0046] More specifically, as shown in Figure 4(A), when both ends of the resonant conductors 55A and 55B are open, the resonance phenomenon occurs because the resonant conductors 55A and 55B have lengths that are integer multiples of half the wavelength λ / 2 of the reference signal. For example, when the length L of the resonant conductors 55A and 55B is half the wavelength λ / 2 of the reference signal, the current corresponding to the signal excited in the resonant conductors 55A and 55B (excitation signal) is minimum at both ends of the resonant conductors 55A and 55B and maximum at the center position C of the resonant conductors 55A and 55B. At this time, the voltage is maximum at both ends of the resonant conductors 55A and 55B and minimum at the center position C of the resonant conductors 55A and 55B.

[0047] If the excitation signal is extracted from the central position C where the current amplitude is maximum in the resonant conductors 55A and 55B, it may cause attenuation of the reference signal transmitted in the first reference signal transmission line 53. Also, if the excitation signal is extracted from the terminal position where the voltage amplitude is maximum in the resonant conductors 55A and 55B, the impedance becomes too large, making it difficult to extract the excitation signal. For this reason, the position from which the excitation signal is extracted from the resonant conductors 55A and 55B, i.e., the contact position G with the second reference signal transmission line 580, is preferably a position in the longitudinal direction (longitudinal or extending direction) of the resonant conductors 55A and 55B that is shifted toward both ends from the central position C, and excluding both ends (see Figure 3). The contact position G is preferably in the range of λ / 20 ≤ (contact position G) ≤ λ / 5, starting from the open end of the resonant conductors 55A and 55B toward the central position C (see the shaded area in Figure 4(A)). Preferably, the range is λ / 12 ≤ (contact position G) ≤ 5λ / 12. More preferably, the range is λ / 6 ≤ (contact position G) ≤ λ / 3.

[0048] As shown in Figure 4(B), when both ends of the resonant conductors 55A and 55B are grounded, the resonance phenomenon occurs because the resonant conductors 55A and 55B have lengths that are integer multiples of half the wavelength λ / 2 of the reference signal. For example, when the length L of the resonant conductors 55A and 55B is half the wavelength λ / 2 of the reference signal, the current corresponding to the signal excited in the resonant conductors 55A and 55B (excitation signal) is maximum at both ends of the resonant conductors 55A and 55B and minimum at the center position C of the resonant conductors 55A and 55B. At this time, the voltage is maximum at the center position C of the resonant conductors 55A and 55B and minimum at both ends of the resonant conductors 55A and 55B.

[0049] For the same reasons as when both ends of the resonant conductors 55A and 55B are open, the position from which the excitation signal is extracted from the resonant conductors 55A and 55B, i.e., the contact position G with the second reference signal transmission line 580, is preferably a position shifted toward both ends of the resonant conductor in the longitudinal direction (longitudinal or extending direction) (see Figure 3). The contact position G is preferably in the range of λ / 20 ≤ (contact position G) ≤ λ / 5, starting from the open ends of the resonant conductors 55A and 55B toward the center position C (see the shaded area in Figure 4(B)). Preferably, it is in the range of L / 12 ≤ (contact position G) ≤ 5λ / 12. Even more preferably, it is in the range of λ / 6 ≤ (contact position G) ≤ λ / 3.

[0050] As shown in Figure 4(C), when one end is open and the other end is grounded, resonance occurs if the resonant conductors 55A and 55B have lengths that are odd integer multiples of half the wavelength λ / 4 of the reference signal. For example, when the lengths of the resonant conductors 55A and 55B are half the wavelength λ / 4 of the reference signal, the current corresponding to the excitation signal excited in the resonant conductors 55A and 55B is minimum at the open ends of the resonant conductors 55A and 55B and maximum at the ground ends of the resonant conductors 55A and 55B (hereinafter referred to as the ground ends). Also, the voltage is maximum at the open ends of the resonant conductors 55A and 55B and minimum at the ground ends of the resonant conductors 55A and 55B.

[0051] The contact points G from which excitation signals are extracted from the resonant conductors 55A and 55B are preferably located at positions offset to both ends of the resonant conductor in the longitudinal direction (longitudinal or extending direction) of the resonant conductor (see Figure 3). The contact points G are preferably in the range of λ / 40 ≤ (contact point G) ≤ λ / 10, starting from both ends of the resonant conductors 55A and 55B and moving toward the central position C (see the shaded area in Figure 4(C)). Preferably, the range is L / 24 ≤ (contact point G) ≤ 5λ / 24. Even more preferably, the range is λ / 12 ≤ (contact point G) ≤ λ / 6.

[0052] The linear resonant conductors 55A shown in Figure 3(A) are arranged near the first reference signal transmission line 53 at intervals and in a non-contact manner, with the longitudinal direction of the linear resonant conductors 55A parallel to the longitudinal direction of the first reference signal transmission line 53. Here, the planar portions of both the linear resonant conductors 55A and the first reference signal transmission line 53 are facing each other, but this is not limited to this arrangement, and they do not have to face each other. The multiple linear resonant conductors 55A are arranged at intervals along the longitudinal direction (transmission direction A) of the first reference signal transmission line 53. It is preferable that the multiple linear resonant conductors 55A are arranged in a line. The longitudinal direction of the first reference signal transmission line 53 is either the longitudinal direction of the first reference signal transmission line 53 or the direction in which the first reference signal transmission line 53 extends.

[0053] In the case of the C-type resonant conductor 55B shown in Figure 3(B), the direction in which both ends 55B1 face each other is defined as the first direction H of the C-type resonant conductor 55B, and the direction perpendicular to both the first direction H and the thickness direction D of the C-type resonant conductor 55B is defined as the second direction W of the C-type resonant conductor 55B. The C-type resonant conductor 55B is arranged in the vicinity of the first reference signal transmission line 53 with a gap between them and in a non-contact state, in an orientation in which the first direction H and the longitudinal direction (transmission direction A) of the first reference signal transmission line 53 are parallel. Alternatively, as shown in Figure 5, the C-type resonant conductor 55B may be arranged in the vicinity of the first reference signal transmission line 53 with a gap between them and in a non-contact state, in an orientation in which the second direction W of the C-type resonant conductor 55B and the longitudinal direction (transmission direction A) of the first reference signal transmission line 53 are parallel. In this case, although the planar portions of the C-type resonant conductor 55B and the first reference signal transmission line 53 are shown facing each other in Figures 3(B) and 5, this is not limited to this arrangement, and they do not need to face each other. The multiple C-type resonant conductors 55B are arranged at intervals along the length direction (transmission direction A) of the first reference signal transmission line 53. It is preferable that the multiple C-type resonant conductors 55B are arranged in a line.

[0054] As shown in Figures 3(A) and (B), the C-type resonant conductor 55B occupies less space (occupied length in transmission direction A) along the length of the first reference signal transmission path 53 (transmission direction A) compared to the linear resonant conductor 55A because it is bent. As a result, the C-type resonant conductor 55B can be arranged more densely along transmission direction A than the linear resonant conductor 55A.

[0055] Furthermore, the first reference signal transmission line 53 and the multiple resonators 55 constitute a wireless communication signal distribution device that distributes various signals related to wireless communication, such as reference signals, to multiple parties.

[0056] <Arrangement of the first reference signal transmission path and resonator> Referring to the cross-sectional view in Figure 7, the arrangement of the first reference signal transmission line 53 and the resonator 55 will be explained. As shown in Figures 7(A) and (B), the first reference signal transmission line 53 is mounted on one side of the first substrate 7. The resonator 55 and the second reference signal transmission line 580, etc. (the second reference signal transmission line 580, etc. are not shown) are mounted on one side of the second substrate 8. The resonator 55, the second reference signal transmission line 580, etc. and the second substrate 8, etc. are housed in a housing 56 to form the transmitting module 59.

[0057] The surface of the first reference signal transmission line 53 is covered by a first insulating layer 70 made of an insulating material that allows electromagnetic fields to pass through. Furthermore, the first insulating layer 70 is covered by a first electromagnetic shielding layer 71 made of a material that shields (blocks) electromagnetic fields, such as a metal coating or metal foil made of copper. In the first electromagnetic shielding layer 71, a first opening 72 is formed in a part of the region where the first reference signal transmission line 53 and the resonator 55 face each other. The electromagnetic field generated due to the reference signal flowing through the first reference signal transmission line 53 is transmitted to the resonator 55 by passing through the first insulating layer 70 and the first opening 72. In the resonator 55, a resonance phenomenon caused by the electromagnetic field occurs. The total thickness of the first insulating layer 70 and the first electromagnetic shielding layer 71 is preferably set to 1.5 mm or less, for example, and is 0.1 mm in this case.

[0058] The surfaces of the second reference signal transmission line 580 and the resonator 55 are covered by a second insulating layer 73 made of an insulating material that allows electromagnetic fields to pass through. Furthermore, the second insulating layer 73 is covered by a second electromagnetic shielding layer 74 made of a material that shields electromagnetic fields, such as a metal coating or metal foil made of copper. In the second electromagnetic shielding layer 74, a second opening 75 is formed in a portion of the region where the first reference signal transmission line 53 and the resonator 55 face each other. The electromagnetic field generated by the reference signal flowing through the first reference signal transmission line 53 passes through the second opening 75 and the second insulating layer 73, is transmitted to the resonator 55, and is received by the resonator 55. The total thickness of the second insulating layer 73 and the second electromagnetic shielding layer 74 is preferably set to 1.5 mm or less, for example, and is 0.1 mm in this case.

[0059] Here, we have illustrated the case where the first opening 72 and the second opening 75 are formed, but their shapes are not particularly limited and may be notches or the like. Also, a portion of the region where the first reference signal transmission line 53 and the resonator 55 face each other may be covered with a material that allows electromagnetic fields to pass through. In other words, any configuration is acceptable as long as a "non-electromagnetic shielding region (unshielded region)" that allows electromagnetic fields to pass through is formed in the portion of the region where the first reference signal transmission line 53 and the resonator 55 face each other. The non-electromagnetic shielding region (unshielded region) naturally includes the region surrounded by the first opening 72, the second opening 75, notches, etc.

[0060] When the transmitting module 59 is attached to the first substrate 7, the resonator 55 and the first reference signal transmission line 53 face each other in a non-contact state with a gap (air layer P) between them. The direct distance between the resonator 55 and the first reference signal transmission line 53 is preferably set within the range of 0.01 to 3 (mm), including the interposition of each insulating layer and each electromagnetic shielding layer, but is not limited to this, and may be any other distance that causes the resonance phenomenon. The housing 56 of the transmitting module 59 or the second substrate 8 is preferably provided with a spacer 9 that maintains a constant distance between the resonator 55 and the first reference signal transmission line 53. The spacer 9 may be part of the housing 56 or a separate component.

[0061] As shown in Figure 7(A), multiple second substrates 8 can be arranged in parallel along the length direction (transmission direction A) of the first reference signal transmission path 53. The spacing between adjacent resonators 55 is not particularly limited.

[0062] Here, as shown in Figure 7(C), when viewing the first reference signal transmission line 53 and the resonator 55 from the stacking direction V of the first substrate 7 and the second substrate 8 (see Figure 7(B)), a non-electromagnetic shielding region (for example, the first opening 72 and the second opening 75) is formed in the overlapping region where the resonator 55 and the first reference signal transmission line 53 overlap in the same direction.

[0063] As described above, by providing each of the electromagnetic shielding layers, no unnecessary electromagnetic fields are emitted from the reference signal flowing through the first reference signal transmission line 53, thus reducing the attenuation of the reference signal.

[0064] The electromagnetic field of the present invention is generated by the reference signal flowing through the first reference signal transmission line 53 and includes both electric and magnetic fields. However, depending on the size and location of the unshielded region, the shape of the resonator 55, etc., the resonator 55 may also experience resonance due to only the electric field or only the magnetic field. For this reason, the scope of the present invention is also included when "electromagnetic field" in the above description is replaced with "electric field" or "magnetic field". In other words, the scope of the present invention is also included when "electromagnetic field" in the above description is replaced with "electric field and / or magnetic field".

[0065] <Installation configuration of the transmission module> The installation configuration of the transmitting module 59 will be explained with reference to Figure 8. The first board 7 on which the power supply line 50A, the first reference signal transmission line 53, etc. are mounted is defined as the first circuit board 10. As shown in Figure 8(A), in this embodiment, four transmitting modules 59 can be installed on the first circuit board 10. For example, when installing 16 transmitting modules 59, four first circuit boards 10 are prepared. Then, four transmitting modules 59 are installed on each first circuit board 10. The first circuit board 10 and the four transmitting modules 59 are considered as one set, and each set is housed in the transmitting unit housing 590 by stacking them. In this case, as shown in Figure 8(A), the power supply lines 50A and the first reference signal transmission line 53 of adjacent sets in the stacking direction are interconnected with a connecting connector 54B and an expansion section (expansion terminal) 50B. As a result, the power supply line 50A and the first reference signal transmission line 53 are extended in four stages.

[0066] On the other hand, the transmitting SDR unit 3B is provided with at least 16 output ports 3B1. As shown in Figure 8(B), each output port 3B1 of the transmitting SDR unit 3B is connected to the IF terminal 583 of each transmitting module 59 using a connecting cable 30.

[0067] On the other hand, an array antenna 62 is prepared, in which 16 antenna elements 61 are arranged in a regular pattern. As shown in Figure 8(B), the RF terminal 585 of each transmitting module 59 and the connection port of each antenna element 61 of the array antenna 62 are connected using a connecting cable 64.

[0068] Furthermore, if more transmitting modules 59 are to be installed, an additional first circuit board 10 can be prepared and stacked. In this case, an additional array antenna 62 will be provided. As for the transmitting SDR unit 3B, this can be addressed by preparing a transmitting SDR unit 3B with more output ports, or by adding another transmitting SDR unit 3B.

[0069] <Receiving unit> The receiving unit 4 converts the high-frequency RF signal received by the receiving antenna group 6A into a lower-frequency analog communication signal and outputs it to the receiving SDR unit 3A. In this embodiment, the analog communication signal corresponds to the IF (Intermediate Frequency) signal. The receiving SDR unit 3A converts the IF signal into a digital communication signal and outputs it to the information processing unit 2. The frequency of the IF signal is preferably 3 GHz or higher, and more preferably 20 GHz or lower.

[0070] As shown in Figure 9, the receiving unit 4 includes a power supply unit 40, a power supply line 40A, a reference signal source 41, a first reference signal transmission line 43, and a plurality of receiving modules 49. In other words, the receiving unit 4 has the same configuration as the transmitting unit 5.

[0071] The power supply unit 40 and power supply line 40A are the same as the power supply unit 50 and power supply line 50A of the transmitting unit 5. In other words, by replacing the power supply unit 50 and power supply line 50A described in the <Power Supply Unit> section of the transmitting unit 5 with the power supply unit 40 and power supply line 40A, the description in the <Power Supply Unit> section of the transmitting unit 5 can be applied to the power supply unit 40 and power supply line 40A.

[0072] The reference signal source 41 is the same as the reference signal source 51 of the transmitting unit 5. By replacing the reference signal source 51 and the first reference signal transmission line 53 with the reference signal source 41 and the first reference signal transmission line 43 in the explanation of the <reference signal source> in the transmitting unit 5, the explanation of the <reference signal source> in the transmitting unit 5 can be applied to the reference signal source 41.

[0073] The first reference signal transmission line 43 is the same as the first reference signal transmission line 53 of the transmitting unit 5. By replacing the first reference signal transmission line 53 with the first reference signal transmission line 43 in the description of the <first reference signal transmission line> in the transmitting unit 5, the description of the <first reference signal transmission line> in the transmitting unit 5 can be applied to the reference signal source 41.

[0074] <Receiver Module> Referring to Figure 9, the receiving module 49 will be described below. The receiving module 49 has the same configuration as the transmitting module 59. In the receiving module 49, what was an input in the transmitting module 59 becomes an output, and what was an output in the transmitting module 59 becomes an input.

[0075] The receiving module 49 includes a resonator 45, a second reference signal transmission line 480 connected to the output of the resonator 45, a signal conversion unit 481 connected to the resonator 45 through the second reference signal transmission line 480, an RF signal transmission line 484 whose output side is connected to the input of the signal conversion unit 481, an RF terminal 485 connected to the input side of the RF signal transmission line 484, an amplifier 486 provided in the middle of the RF signal transmission line 484 upstream of the signal conversion unit 481, an IF signal transmission line 482 connected to the output side of the signal conversion unit 481, an IF terminal 483 connected to the output side of the IF signal transmission line 482, and an IF amplifier 488 provided in the middle of the IF signal transmission line 482 downstream of the signal conversion unit 481. These components and materials of the receiving module 49 are housed in a casing 46.

[0076] The receiving module 49 is connected to the receiving SDR unit 3A via IF wiring 483A, which is connected to the IF terminal 483. The receiving module 49 is also connected to one receiving antenna 60A via RF wiring 485A, which is connected to the RF terminal 485. Furthermore, the receiving module 49 is provided with a contact 487 for receiving external power. This contact 487 is connected to the power supply line 40A.

[0077] Multiple receiving modules 49 are arranged in parallel along the direction in which the first reference signal transmission path 43 extends. Similar to the transmitting modules 59, additional receiving modules 49 can be added along the first reference signal transmission path 53 if there is available space R around them. Therefore, the receiving unit 4 in this embodiment has extremely high expandability, as the number of receiving modules 49 can be freely changed.

[0078] In the receiving module 49, the RF signal received by the antenna 60C is input to the mixer 481B via the RF wiring 685A connected to the RF terminal 685 and then to the amplifier 486. The mixer 481B also receives a reference signal via the second reference signal transmission line 480 and the frequency converter 481A. The RF signal and the reference signal are mixed in the mixer 481B, and the IF signal is output from the IF signal transmission line 482. The IF signal is amplified by the IF amplifier 488 and output to the receiving SDR unit 3A via the IF wiring 483A connected to the IF terminal 483. The receiving SDR unit 3A converts the IF signal into a digital communication signal and outputs it to the information processing unit 2.

[0079] <Resonator> The resonator 45 is the same as the resonator 55 of the transmitter 5, and the explanation of the <resonator> in the transmitter 5 can be applied to the resonator 45.

[0080] <Signal conversion unit> The signal conversion unit 481 uses a reference signal output from the resonator 45 to convert the RF signal output from the receiving antenna 60A into an IF signal. In other words, the signal conversion unit 481 performs frequency conversion on the RF signal and generates an IF signal as a result. The signal conversion unit 481 includes, for example, a frequency converter 481A and a mixer 481B.

[0081] The frequency converter 481A is installed in the middle of the second reference signal transmission line 480, with its input connected to the resonator 45 and its output connected to the mixer 481B. The frequency converter 481A converts the frequency of the reference signal (excitation signal from the resonator 45) transmitted in the second reference signal transmission line 480. Specifically, the frequency converter 481A may be one that converts the frequency of the reference signal (excitation signal from the resonator 45) to four times its original frequency, but it is not limited to this, and the level of increase can be changed as appropriate.

[0082] The mixer 481B has at least two input ports and an output port. An RF signal received by the receiving antenna 60A is input to one input port of the mixer 481B via the RF signal transmission line 484. Also, a reference signal transmitted from the second reference signal transmission line 580 is input to the other input port of the mixer 481B. Note that the frequency of the reference signal input to the mixer 481B is converted by the frequency converter 481A (for example, quadrupled). Then, in the mixer 481B, the RF signal and the reference signal are mixed and frequency-converted into an IF signal having a frequency lower than that of the RF signal. The output port of the mixer 481B is connected to the IF signal transmission line 482, and the mixer 481B outputs the frequency-converted generated IF signal to the IF signal transmission line 482. For example, when the frequency of the RF signal is 28 (GHz) and the frequency of the reference signal is 27 (GHz), the IF signal mixed by the mixer 481B is 1 (GHz). Then, the IF signal is output to the receiving-side SDR unit 3A via the IF wiring 483A connected to the IF terminal 483.

[0083] Note that if the frequency of the reference signal output from the resonator 45 reaches the desired level, the frequency converter 481A may be omitted.

[0084] <Amplifier> The amplifier 486 provided in the middle of the RF signal transmission line 484 amplifies the RF signal received by the receiving antenna 60A. Note that if the RF signal received by the receiving antenna 60A reaches the desired level, the amplifier 486 may be omitted.

[0085] <IF Amplifier> An IF amplifier 488, located in the middle of the IF signal transmission line 482, amplifies the IF signal output from the signal conversion unit 481 (mixer 481B). The IF signal is output to the receiving SDR unit 3A via the IF wiring 483A connected to the IF terminal 483. The IF signal is converted into a digital signal in the receiving SDR unit 3A and output to the information processing unit 2. The digital signal is then processed by the information processing unit 2, including demodulation. Note that if the IF signal output from the signal conversion unit 481 (mixer 481B) reaches the desired level, the IF amplifier 488 may be omitted.

[0086] As described above, the receiving module 49 has a circuit configuration similar to that of the transmitting module 59. Therefore, the manufacturing costs of both the receiving module 49 and the transmitting module 59 can be reduced.

[0087] Furthermore, if multiple receiving modules 49 are to be installed, they can be installed in accordance with the explanation in <Installation Configuration of Transmitting Modules>.

[0088] <Transmit / Receive Module> Referring to Figure 10, a transceiver module 80 that integrates a receiving module 49 and a transmitting module 59 will be described. As explained above, the receiving module 49 and the transmitting module 59 have similar circuit configurations. Therefore, the transceiver module 80 retains the parts common to the receiving module 49 and the transmitting module 59, while adding parts that are different.

[0089] Furthermore, the receiving antenna group 6A and the transmitting antenna group 6B are no longer distinguished and have become a common antenna group 6C. Also, the receiving SDR unit 3A and the transmitting SDR unit 3B are no longer distinguished and have become a common transmitting / receiving SDR unit 3.

[0090] Specifically, the transmitting / receiving module 80 includes a transmitting circuit section 82, a receiving circuit section 84, a transmitting / receiving switching section 86, an RF terminal 87, and contacts 88, etc.

[0091] The transmitting circuit 82 converts the IF signal output from the transmitting / receiving SDR unit 3 into an RF signal and outputs it. The transmitting circuit 82 includes a resonator 55 in the transmitting module 59, a signal conversion unit 581 (frequency converter 581A, mixer 581B), a second reference signal transmission line 580, an IF signal transmission line 582, an IF terminal 583, an RF signal transmission line 584, an amplifier 586, etc.

[0092] The receiving circuit section 84 converts the RF signal received by the antenna (transmitting antenna) 60C of the antenna group 6C into an IF signal and outputs it. The receiving circuit section 84 includes a resonator 45 in the receiving module 49, a second reference signal transmission line 480, a signal conversion section 481 (frequency converter 481A, mixer 481B), an RF signal transmission line 484, an amplifier 486, an IF signal transmission line 482, an IF terminal 483, an IF amplifier 488, etc.

[0093] Furthermore, if the signal to be amplified in the transmitting / receiving module 80 has reached the desired level, amplifiers 586, 486, and IF amplifier 488 may be omitted.

[0094] In addition, the frequency converter 681A (581A, 481A) and the resonator 65 are shared between the transmitting circuit 82 and the receiving circuit 84. The frequency converter 681A corresponds to the frequency converters 581A and 481A, and the resonator 65 corresponds to the resonators 55 and 45. Furthermore, the first reference signal transmission line 63, the power supply line 90A, the RF signal transmission line 484, and the RF terminal 685 connected to the RF signal transmission line 584 are common to both the transmitting circuit 82 and the receiving circuit 84. The first reference signal transmission line 63 and the power supply line 90A correspond to the first reference signal transmission lines 43 and 53, and the power supply lines 40A and 50A, respectively.

[0095] The transmit / receive switching unit 86 switches between transmitting the RF signal output from the transmit circuit unit 82 and receiving the RF signal at the receive circuit unit 84 via the antenna 60C. The transmit / receive switching unit 86 switches between transmission and reception processing in a time-division manner, for example. The transmit / receive switching unit 86 acts as a time-division switch, and the switching timing is controlled by the switching control unit (not shown). When switching to RF signal transmission, the transmit / receive switching unit 86 opens the connection between the transmit circuit unit 82 and the RF terminal 685, while blocking the connection between the receive circuit unit 84 and the RF terminal 685. As a result, the RF signal output from the transmit circuit unit 82 is output to one antenna 60C via the RF wiring 685A connected to the RF terminal 685. On the other hand, when switching to RF signal reception, the transmit / receive switching unit 86 blocks the connection between the transmit circuit unit 82 and the RF terminal 685, while opening the connection between the receive circuit unit 84 and the RF terminal 685. As a result, the RF signal received by one antenna 60C is received by the receiving circuit 84 via the RF wiring 685A connected to the RF terminal 685.

[0096] In the transmission process of the transmit / receive module 80, first, a digital communication signal is generated in the information processing unit 2 and output to the transmit / receive SDR unit 3. The transmit / receive SDR unit 3 converts the digital communication signal into an IF signal and outputs it to the transmit circuit unit 82. The IF signal and the reference signals from the resonator 65 and frequency converter 681A are then input to the mixer 581B and mixed to generate an RF signal. At this time, the transmit / receive switching unit 86 is switched to transmit the RF signal at a predetermined timing. The RF signal is amplified by the amplifier 586 and output to one antenna 60C via the RF wiring 685A connected to the RF terminal 685.

[0097] Meanwhile, in the receiving process of the transmitting / receiving module 80, the transmitting / receiving switching unit 86 switches to receiving RF signals at a predetermined timing. At this time, the RF signal received by the antenna 60C is output to the receiving circuit unit 84 via the RF wiring 685A connected to the RF terminal 685. The RF signal amplified by the amplifier 486 and the reference signals from the resonator 65 and frequency converter 681A are input to the mixer 481B and mixed to generate an IF signal. The IF signal is amplified by the IF amplifier 488 and output to the transmitting / receiving SDR unit 3 via the IF wiring 483A connected to the IF terminal 483. The transmitting / receiving SDR unit 3 converts the IF signal into a digital communication signal and outputs it to the information processing unit 2.

[0098] Furthermore, when installing multiple transmit / receive modules 80, multiple transmit / receive modules 80 can be installed in accordance with the explanation in <Transmitting Module Installation Configuration>.

[0099] Furthermore, in the above explanation, the transmitting module and receiving module may be read as "communication module." Also, each part that transmits an IF signal to or receives an IF signal from the communication module (for example, the receiving SDR unit, the transmitting SDR unit, the transmitting / receiving SDR unit, etc.) may be read as an IF signaling device.

[0100] Furthermore, while the above explanation uses the example of a wireless communication signal distribution device where the signal to be distributed is a reference signal used in the process of generating communication signals, it is not limited to this. The signal to be distributed may be any other signal related to wireless communication, including communication signals such as IF signals and RF signals flowing through the transmission path (other signals appearing in the communication system), or it may be any signal unrelated to wireless communication used in the communication system.

[0101] Furthermore, the communication system and wireless communication signal distribution device of the present invention are not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention.

[0102] Furthermore, the first reference signal transmission line 53 and the multiple resonators 55 described above are not limited to the distribution of various signals (first signals) related to wireless communication, but can also be applied to the distribution of signals for other applications besides wireless communication. In other words, the present invention may be configured as a signal distribution (duplication) device that distributes (duplication) signals by exciting the signals flowing through the transmission line into multiple resonators through a resonance phenomenon, without limiting the type of signal. [Explanation of Symbols]

[0103] 1. Communication System 2. Information Processing Unit 3. Transceiver / SDR section 3A Receiving SDR section 3B Transmitter-side SDR section 4. Receiving Unit 5. Transmitter 6A Receiving Antenna Group 6B Transmitting Antenna Group 6C antenna array 7 First board 8 Second board 40,50 Power supply section 40A, 50A, 90A power supply path 41,51 Reference signal source 43,53 First reference signal transmission path 45,55,65 resonator 46,56 cabinets 49, 59 Receiving Module 50 Power supply section 55A Resonant Conductor (Linear Resonant Conductor) 55B Resonant conductor (C-type resonant conductor) 60A Receiving Antenna 60B transmitting antenna 60C antenna 70 First insulating layer 71 First electromagnetic shielding layer 72 First hole 73 Second insulating layer 74 Second electromagnetic shielding layer 75 Second hole 80 Transceiver Modules 82 Transmitter Circuit Section 84 Receiving Circuit Section 86 Transmit / receive switching unit 87 RF terminal 88 contacts 480,580 Second Reference Signal Transmission Line 481,581 Signal conversion section 481A, 581A, 681A frequency converter 481B, 581B Mixer 482,582 IF signal transmission path 483,583 IF terminal 483A,583A IF wiring 484,584 RF signal transmission lines 485,585,685 RF terminal 485A,585A,685A RF wiring 486,586 Amplifiers 487,587 contacts 488 IF amplifier 590 Enclosure for Transmitter P Air layer

Claims

1. A transmission path for transmitting the first signal, Multiple resonators are arranged at intervals along the transmission direction of the first signal, without contact with the transmission path, and resonate at the frequency of the first signal, thereby exciting a second signal that has the same frequency as the first signal. A feature comprising: Signal distribution device for wireless communication.

2. The resonator is characterized by being composed of a conductor having a length that causes resonance at the frequency of the first signal. The wireless communication signal distribution device according to claim 1.

3. The conductor is characterized by being an open ring. The wireless communication signal distribution device according to claim 2.

4. The invention is characterized by comprising a second transmission path connected to the conductor at a position offset from the center of the conductor in the longitudinal direction toward the end, and for leading the second signal out from the resonator to the outside. The wireless communication signal distribution device according to claim 2 or 3.

5. Between the resonator and the transmission line, an electromagnetic shielding layer made of a material that blocks electric and / or magnetic fields, and an air layer are arranged. The electromagnetic shielding layer is characterized in that it has an unshielded region that transmits an electric field and / or a magnetic field from the transmission line to the resonator. A signal distribution device for wireless communication according to any one of claims 1 to 3.

6. Connected to the resonator, the second signal is led out from the resonator to the outside and connected to the second transmission path, A mixer connected to the second transmission line, An RF signal transmission path connected to the mixer for transmitting RF signals, An IF signal transmission path connected to the mixer for transmitting IF signals, A housing that accommodates at least the resonator, the second transmission line, the mixer, the RF signal transmission line, and the IF signal transmission line, It is equipped with a communication module having The mixer generates the RF signal by mixing the second signal and the IF signal, or generates the IF signal by mixing the second signal and the RF signal. The communication modules are characterized in that a plurality of them are arranged in parallel along the transmission path. The wireless communication signal distribution device according to claim 1.

7. A wireless communication signal distribution device according to claim 6, An IF signaling device that transmits or receives the IF signal to each of the multiple communication modules, Multiple antennas connected to each of the multiple communication modules for transmitting or receiving the RF signal, A feature comprising: Communication system.

Images