Variable frequency power feeding network microwave circuit board and phased array radar

Abstract

The application provides a variable frequency feeding network microwave circuit board and a phased array radar. The variable frequency feeding network microwave circuit board comprises a power division printed circuit substrate and a variable frequency feeding assembly; the variable frequency feeding assembly comprises a power divider, a frequency source, a radio frequency switch and a plurality of frequency converters; the power divider, the frequency source and the radio frequency switch are arranged on a first surface of the power division printed circuit substrate; the plurality of frequency converters are arranged on a second surface of the power division printed circuit substrate; an output end of the power divider is connected with an input end of the frequency source; an output end of the frequency source is connected with a first input end of the radio frequency switch; and a plurality of output ends of the frequency converters output intermediate frequency signals through a combining network of the power division printed circuit substrate. The power divider, the frequency source and the radio frequency switch are arranged on the first surface, and the plurality of frequency converters are arranged on the second surface, so that the variable frequency synthesis, power division and synthesis of the radio frequency signal are realized, and the integration of the variable frequency feeding network microwave circuit board is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radar technology, in particular to a variable frequency feed network microwave circuit board and a phased array radar. BACKGROUND

[0002] With the continuous progress of aerospace, ship communication, electronic information, radio frequency microwave and other technologies, various electronic equipment develops towards high integration, miniaturization and light weight. The variable frequency feed network microwave assembly is a key component of the phased array radar, mainly realizing frequency conversion processing, power distribution / synthesis processing, control signal transmission and power connection, and is an important part of connecting the antenna array surface and the control system. The current variable frequency feed network assembly generally includes a PCB control backboard, a power divider assembly, a radio frequency cable assembly, a shell case structure and the like, and the product size is generally more than 500mm and the weight is more than 15kg.

[0003] However, the connection between radio frequency signals is realized by a plurality of cable assemblies, and any problem of any cable assembly will affect the normal work of the product. The internal cable of the traditional variable frequency feed network microwave assembly product is densely arranged and staggered, resulting in large and heavy size of the assembly, which easily leads to low reliability and complicated and time-consuming assembly. SUMMARY

[0004] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a variable frequency feed network microwave circuit board and a phased array radar which effectively reduce the size and weight.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] A variable frequency feed network microwave circuit board, comprising: a power division printed circuit substrate and a variable frequency feed assembly; the variable frequency feed assembly comprises a power divider, a frequency source, a radio frequency switch and a plurality of frequency converters, the power divider, the frequency source and the radio frequency switch are arranged on a first surface of the power division printed circuit substrate, a plurality of the frequency converters are arranged on a second surface of the power division printed circuit substrate, an input end of the power divider is used for receiving a reference signal, an output end of the power divider is connected with an input end of the frequency source, an output end of the frequency source is connected with a first input end of the radio frequency switch, a second input end of the radio frequency switch is used for receiving an external local oscillator signal, output ends of the radio frequency switch are used for being connected with input ends of the frequency converters through a power division network in the power division printed circuit substrate respectively, antenna ends of the frequency converters are used for receiving antenna signals, and a plurality of output ends of the frequency converters output intermediate frequency signals through a combining network of the power division printed circuit substrate.

[0007] In one of the embodiments, the frequency sources are two, and the two two-way outputs of the power divider are respectively connected with the inputs of the frequency sources.

[0008] In one of the embodiments, the radio frequency switches are two, and the outputs of the frequency sources are respectively connected with the first inputs of the radio frequency switches.

[0009] In one of the embodiments, the second inputs of one of the radio frequency switches receive first external local oscillator signals, and the second inputs of the other radio frequency switches receive second external local oscillator signals.

[0010] In one of the embodiments, the frequency converters are eight, the outputs of the radio frequency switches are connected with the inputs of one-eighth power dividers in the power division printed circuit board, and the outputs of the one-eighth power dividers are respectively connected with the inputs of the frequency converters.

[0011] In one of the embodiments, the frequency conversion feeder network microwave circuit board further comprises carrier pads arranged on the first surface, the carrier pads are arranged in the first pad area of the power division printed circuit board, the carrier pads are respectively connected with the inputs of the power dividers and the second inputs of the radio frequency switches, and the carrier pads have reference signal connection ends and external local oscillator signal connection ends to receive the reference signals and the external local oscillator signals.

[0012] In one of the embodiments, the carrier pads further have combining connection ends, and the combining connection ends are connected with the outputs of the frequency converters through a combining network of the power division printed circuit board.

[0013] In one of the embodiments, the frequency conversion feeder network microwave circuit board further comprises control signal connector pads and power supply connector pads arranged on the first surface, the control signal connector pads are respectively connected with the control ends of the power dividers, the frequency sources and the radio frequency switches through a control network in the power division printed circuit board, and the power supply connector pads are respectively connected with the power supply ends of the power dividers, the frequency sources and the radio frequency switches through a power supply network in the power division printed circuit board.

[0014] In one of the embodiments, the frequency conversion feeder network microwave circuit board further comprises antenna end signal connector pads arranged on the second surface, and the antenna end signal connector pads are connected with the antenna ends of the frequency converters through an antenna network in the power division printed circuit board.

[0015] A phased array radar comprises the frequency conversion feeder network microwave circuit board of any one of the embodiments.

[0016] Compared with the prior art, the present application has at least the following advantages:

[0017] The power divider, the frequency source and the radio frequency switch are on the first surface, and the multiple frequency converters are on the second surface, which are closely distributed, and the power divider, the frequency source and the radio frequency switch are connected with the frequency converters through the internal circuit network of the power divider printed circuit substrate, so that the frequency conversion, power distribution and combination of the radio frequency signals are realized, the transmission of the radio frequency signals is facilitated, the integration of the frequency conversion feeding network microwave circuit board is improved, and the size and weight of the frequency conversion feeding network microwave circuit board are effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 Fig. 1 is a schematic diagram of a frequency conversion feeding network microwave circuit board in an embodiment;

[0020] Figure 2 Fig. 2 is another perspective view of the frequency conversion feeding network microwave circuit board shown in Fig. 1; Figure 1

[0021] Figure 3 Fig. 3 is a schematic diagram of a hair-pin radio frequency connector on the frequency conversion feeding network microwave circuit board shown in Fig. 1. Figure 1 DETAILED DESCRIPTION In order to make the present application more clearly understood, the following will make a more comprehensive description of the present application with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0022] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0023] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0024] ​Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0025] The present application relates to a variable frequency power feeding network microwave circuit board. In one embodiment, the variable frequency power feeding network microwave circuit board comprises a power division printed circuit substrate and a variable frequency power feeding assembly. The variable frequency power feeding assembly comprises a power divider, a frequency source, a radio frequency switch and a plurality of frequency converters. The power divider, the frequency source and the radio frequency switch are disposed on a first surface of the power division printed circuit substrate, and the plurality of frequency converters are disposed on a second surface of the power division printed circuit substrate. An input end of the power divider is configured to receive a reference signal, an output end of the power divider is connected to an input end of the frequency source, an output end of the frequency source is connected to a first input end of the radio frequency switch, a second input end of the radio frequency switch is configured to receive an external local oscillator signal, and output ends of the radio frequency switch are configured to be connected to input ends of the plurality of frequency converters through a power division network in the power division printed circuit substrate, respectively. Antenna ends of the plurality of frequency converters are configured to receive antenna signals, and a plurality of output ends of the plurality of frequency converters are configured to output intermediate frequency signals through a combining network of the power division printed circuit substrate. The power divider, the frequency source and the radio frequency switch are closely distributed on the first surface, and the plurality of frequency converters are closely distributed on the second surface. The power divider, the frequency source and the radio frequency switch are connected to the plurality of frequency converters through internal circuit networks of the power division printed circuit substrate, so that variable frequency synthesis, power division and combination of radio frequency signals are realized, transmission of the radio frequency signals is facilitated, integration of the variable frequency power feeding network microwave circuit board is improved, and size and weight of the variable frequency power feeding network microwave circuit board are effectively reduced.

[0026] Referring to Figure 1 which is a structural schematic diagram of the variable frequency power feeding network microwave circuit board according to one embodiment of the present application.

[0027] The variable frequency power feeding network microwave circuit board 10 according to one embodiment comprises a power division printed circuit substrate 100 and a variable frequency power feeding assembly 200. The variable frequency power feeding assembly 200 comprises a power divider 210, a frequency source 220 and a radio frequency switch 230. Referring to Figure 2The variable frequency feeding assembly 200 further comprises a plurality of frequency converters 240. The power divider 210, the frequency source 220 and the radio frequency switch 230 are arranged on the first surface of the power divider printed circuit board 100, and the plurality of frequency converters 240 are arranged on the second surface of the power divider printed circuit board 100. The input end of the power divider 210 is configured to receive a reference signal, the output end of the power divider 210 is connected with the input end of the frequency source 220, the output end of the frequency source 220 is connected with the first input end of the radio frequency switch 230, the second input end of the radio frequency switch 230 is configured to receive an external local oscillator signal, the output end of the radio frequency switch 230 is configured to be connected with the input end of each frequency converter 240 through a power dividing network in the power divider printed circuit board 100, the antenna end of the frequency converter 240 is configured to receive an antenna signal, and a plurality of output ends of the frequency converter 240 are configured to output intermediate frequency signals through a combining network of the power divider printed circuit board 100.

[0028] In the embodiment, the power divider 210, the frequency source 220 and the radio frequency switch 230 are arranged on the first surface, and the plurality of frequency converters 240 are arranged on the second surface, which are closely distributed. The power divider 210, the frequency source 220 and the radio frequency switch 230 are connected with the frequency converters 240 through the internal circuit network of the power divider printed circuit board 100, so as to realize the frequency conversion, power division and combination of the radio frequency signals, facilitate the transmission of the radio frequency signals, improve the integration of the variable frequency feeding network microwave circuit board, and effectively reduce the size and weight of the variable frequency feeding network microwave circuit board. The radio frequency signal can also be a microwave.

[0029] In one of the embodiments, referring to Figure 1 The frequency source 220 is two, and the two two-way output ends of the power divider 210 are respectively connected with the input ends of the frequency sources 220. In the embodiment, the frequency source 220 is used as a frequency generating source of the main radio frequency signal of the variable frequency feeding network microwave circuit board, that is, the frequency source 220 provides an electronic component for adjusting the frequency of the radio frequency signal, that is, the frequency source 220 provides the radio frequency signal with a basic frequency in a continuous time. The two-way output end of the power divider 210 divides the reference signal into two, so that the power divider 210 outputs two signals, so as to separately output each signal, improve the processing accuracy of the reference signal, and avoid the crosstalk between the signals.

[0030] Further, the radio frequency switch 230 is two, and the output end of each frequency source 220 is connected with the first input end of the radio frequency switch 230. In the embodiment, the radio frequency switch 230 and the frequency source 220 are both two, that is, the radio frequency switch 230 and the frequency source 220 are one-to-one corresponding, so as to control the output of the radio frequency signal output by the frequency source 220 in a branch manner, further improve the processing accuracy of the reference signal, and avoid crosstalk between the signals.

[0031] Further, the second input end of one of the radio frequency switches 230 receives a first external local oscillator signal, and the second input end of the other radio frequency switch 230 receives a second external local oscillator signal. In the embodiment, the number of the radio frequency switch 230 is two, and the two radio frequency switches 230 receive two different external local oscillator signals, that is, the two radio frequency switches 230 receive two different carrier signals, so as to facilitate the signal superposition with the reference signal, thereby facilitating the transmission of the reference signal.

[0032] In one embodiment, as shown in Figure 2 , the frequency converter 240 is eight, the output end of the radio frequency switch 230 is connected with the input end of an eight-way power divider 210 in the power division printed circuit board 100, and the output end of the eight-way power divider 210 is respectively connected with the input end of each frequency converter 240. In the embodiment, the frequency converter 240 is arranged on the second surface, and the frequency converter 240 corresponds to the output end of the radio frequency switch 230, that is, each frequency converter 240 corresponds to one output end of the radio frequency switch 230, that is, the frequency converter 240 and the output end of the radio frequency switch 230 are one-to-one corresponding. The output end of the radio frequency switch 230 is output through the eight-way power divider 210, and the output end of the radio frequency switch 230 is connected with the input end of the eight-way power divider 210, so as to divide the input radio frequency signal in a branch manner, that is, divide the radio frequency signal received by the radio frequency switch 230 into eight, thereby facilitating the power distribution of the radio frequency signal.

[0033] In one embodiment, as shown in Figure 1The variable frequency power feeding network microwave circuit board 10 further comprises a carrier wave pad 300 arranged on the first surface, the carrier wave pad 300 is arranged on the first pad area of the power divider printed circuit substrate 100, and the carrier wave pad 300 is connected with the input end of the power divider 210 and the second input end of the radio frequency switch 230 respectively, and the carrier wave pad 300 has a reference signal connection end 310 and an external local oscillator signal connection end 320 to receive the reference signal and the external local oscillator signal. In the embodiment, the carrier wave pad 300 is located on the first surface, and the carrier wave pad 300 serves as a connection position of the carrier wave signal of the variable frequency power feeding network microwave circuit board, and the carrier wave pad 300 has corresponding signal connection ports, i.e. the reference signal connection end 310 and the external local oscillator signal connection end 320, so as to facilitate the carrier wave pad 300 to receive the reference signal and the external local oscillator signal, thereby facilitating the power divider 210 and the radio frequency switch 230 to process the reference signal and the external local oscillator signal.

[0034] Further, the carrier wave pad 300 further has a combination connection end 330 connected with the output end of the frequency converter 240 through the combination network of the power divider printed circuit substrate 100. In the embodiment, the carrier wave pad 300 serves as a carrier wave transmission port of the radio frequency signal, receives corresponding carrier wave signals through the reference signal connection end 310 and the external local oscillator signal connection end 320, and the combination connection end 330 is located on the carrier wave pad 300 to integrate the radio frequency signals output by the output end of the frequency converter 240 through the combination connection end 330, specifically, to perform multi-combination processing on the multiple radio frequency signals, thereby facilitating frequency conversion synthesis and power synthesis of the radio frequency signal output.

[0035] In one of the embodiments, please refer to Figure 1The variable frequency power feeding network microwave circuit board 10 further comprises a control signal connector pad 400 and a power supply connector pad 500 arranged on the first surface, the control signal connector pad 400 is connected with the control terminals of the power divider 210, the frequency source 220 and the radio frequency switch 230 respectively through the control network in the power dividing printed circuit substrate 100, and the power supply connector pad 500 is connected with the power supply terminals of the power divider 210, the frequency source 220 and the radio frequency switch 230 respectively through the power supply network in the power dividing printed circuit substrate 100. In the embodiment, the control signal connector pad 400 is located on the first surface of the power dividing printed circuit substrate 100, the control signal connector pad 400 serves as a transmission port of control signal, and the control terminals of the power divider 210, the frequency source 220 and the radio frequency switch 230 receive control signal through the control signal connector pad 400, that is, the control signal connector pad 400 is connected with external control signal line, so as to control the operation of the power divider 210, the frequency source 220 and the radio frequency switch 230 by external control signal. The power supply connector pad 500 is located on the first surface of the power dividing printed circuit substrate 100, the power supply connector pad 500 serves as a transmission port of power supply signal, and the power supply terminals of the power divider 210, the frequency source 220 and the radio frequency switch 230 receive power supply signal through the power supply connector pad 500, that is, the power supply connector pad 500 is connected with external power supply line, so as to provide power for the operation of the power divider 210, the frequency source 220 and the radio frequency switch 230 by external power supply.

[0036] In one embodiment, referring to Figure 2 The variable frequency power feeding network microwave circuit board 10 further comprises an antenna end signal connector pad 600 arranged on the second surface, the antenna end signal connector pad 600 is connected with the antenna terminals of the frequency converter 240 through the antenna network in the power dividing printed circuit substrate 100. In the embodiment, the antenna end signal connector pad 600 is located on the second surface of the power dividing printed circuit substrate 100, the antenna end signal connector pad 600 serves as a transmission port of antenna signal, and each antenna terminal of the frequency converter 240 transmits antenna signal through the antenna end signal connector pad 600, that is, the antenna end signal connector pad 600 is connected with external antenna signal line, so as to transmit between external antenna signal and the frequency converter 240.

[0037] In the actual use of the variable frequency power supply network microwave circuit board, each solder pad has an interface connected with an external connector, which is arranged on the circuit board by buckle or welding method, and can effectively and quickly fix and connect the external connector on the solder pad, so as to facilitate the stable contact of the external connector with the circuit on the circuit board. However, the traditional solder pad connector structure is prone to poor contact after long-term use, and the maintenance of the solder pad connector is difficult, and only a new circuit board can be replaced, resulting in high use cost of the variable frequency power supply network microwave circuit board.

[0038] In order to facilitate the insertion loss test of the variable frequency power supply network microwave circuit board, please refer to Figure 3 The variable frequency power supply network microwave circuit board 10 further comprises a pogo pin RF connector 700, the pogo pin RF connector 700 comprises an outer conductor seat 710, a first conductor piece 720 and a second conductor piece 730, the outer conductor seat 710 is provided with a containing through hole 702, the first conductor piece 720 and the second conductor piece 730 are sequentially clamped in the containing through hole 702; the first conductor piece 720 comprises an inner conductor 722 and a first dielectric body 724, the first dielectric body 724 is provided with a first through hole 704 in communication with the containing through hole 702, the inner conductor 722 is arranged in the first through hole 704, and the inner conductor 722 is used for connecting with an external signal line; the second conductor piece 730 comprises a second dielectric body 732, a pogo pin connecting body 734 and a probe 736, the second dielectric body 732 is provided with a second through hole 706 in communication with the containing through hole 702, the pogo pin connecting body 734 and the probe 736 are arranged in the second through hole 706, one end of the pogo pin connecting body 734 is connected with the inner conductor 722, the other end of the pogo pin connecting body 734 is connected with the probe 736, and the probe 736 is connected with the solder pad connecting end of the variable frequency power supply network microwave circuit board.

[0039] In the embodiment, the outer conductor seat 710 serves as the base of the pogo pin RF connector 700, and the outer conductor seat 710 fixes the first conductor piece 720 and the second conductor piece 730 thereon, facilitating the fixation and connection of the first conductor piece 720 and the second conductor piece 730 on the pad. The first dielectric body 724 is located in the accommodating through hole 702, and specifically, the first dielectric body 724 is clamped in the accommodating through hole 702, so that the first dielectric body 724 is stably arranged in the outer conductor seat 710. The first through hole 704 is formed on the first dielectric body 724, and the inner conductor 722 is arranged on the first dielectric body 724, that is, the inner conductor 722 is clamped by the first through hole 704 and the first dielectric body 724, and the first dielectric body 724 is sleeved on the inner conductor 722, so that the inner conductor 722 is stably arranged in the accommodating through hole 702. The second dielectric body 732 is located in the accommodating through hole 702, and specifically, the second dielectric body 732 is clamped in the accommodating through hole 702, so that the second dielectric body 732 is stably arranged in the outer conductor seat 710. The second through hole 706 is formed on the second dielectric body 732, and the pogo pin connector body 734 and the probe 736 are sleeved on the second dielectric body 732, so that the pogo pin connector body 734 and the probe 736 are stably arranged on the second dielectric body 732. The second through hole 706 is aligned with the first through hole 704, facilitating the connection of the pogo pin connector body 734 with the probe 736 and the inner conductor 722 at the same time, so as to facilitate the connection of the probe 736 with the external signal line, and further facilitate the stable fixation of the external signal line on the pad. In this way, when contact failure occurs or maintenance is needed, the pogo pin RF connector 700 on the pad can be removed, and the first conductor piece 720 and the second conductor piece 730 in the accommodating through hole 702 can be taken out, and the corresponding damaged components can be replaced, without the need to disassemble the entire pad or replace a new circuit board, facilitating the insertion loss test of the frequency conversion power supply network microwave circuit board, and effectively reducing the use cost of the frequency conversion power supply network microwave circuit board. In another embodiment, the pogo pin connector body 734 has a mesh structure, facilitating the provision of elastic force for the probe 736, and ensuring the stability of the electrical connection between the inner conductor 722 and the probe 736.

[0040] Further, please refer to Figure 3The inner conductor 722 comprises a conductive body 7222 connected to each other and a conductor cap 7224, the conductive body 7222 is arranged in the first through hole 704, one end of the conductive body 7222 away from the conductor cap 7224 is connected to an external signal line, the conductor cap 7224 is arranged between the first dielectric body 724 and the second dielectric body 732, the diameter of the conductor cap 7224 is greater than the diameter of the first through hole 704, and the conductor cap 7224 is sleeved with the stud connector 734.

[0041] In the embodiment, the conductive body 7222 and the conductor cap 7224 are both conductive materials, so as to conduct electricity with the stud connector 734. The conductor cap 7224 is located between the first dielectric body 724 and the second dielectric body 732, the conductor cap 7224 is pressed on the first dielectric body 724 by the stud connector 734, the diameter of the conductor cap 7224 is greater than the diameter of the first through hole 704, so that the conductor cap 7224 is always located outside the first through hole 704, thereby the conductor cap 7224 is limited between the first dielectric body 724 and the second dielectric body 732, avoiding the probe 736 pushing the inner conductor 722 out of the first through hole 704 when being pressed, so as to improve the installation stability of the inner conductor 722 in the first through hole 704.

[0042] Further, referring to Figure 3 The second dielectric body 732 is provided with a pressure relief groove 708, the opening of the pressure relief groove 708 faces the outer conductor seat 710, and the pressure relief groove 708 is used to increase the gap between the outer wall of the second dielectric body 732 and the inner wall of the accommodating through hole 702.

[0043] In the embodiment, the pressure relief groove 708 is arranged on the outer wall of the second dielectric body 732, the opening of the pressure relief groove 708 faces the outer wall of the second dielectric body 732, so that the outer wall of the second dielectric body 732 is recessed, thereby the outer wall of the second dielectric body 732 is partially separated from the inner wall of the accommodating through hole 702, and the space between the outer wall of the second dielectric body 732 and the inner wall of the accommodating through hole 702 is increased. In this way, when the second dielectric body 732 is installed in the accommodating through hole 702, the outer wall of the second dielectric body 732 is partially separated from the inner wall of the accommodating through hole 702, so that the adsorption force between the outer wall of the second dielectric body 732 and the inner wall of the accommodating through hole 702 is reduced, thereby the second dielectric body 732 can be quickly taken out of the accommodating through hole 702 during maintenance, so as to improve the maintenance efficiency of the stud RF connector 700.

[0044] In one of the embodiments, the application further provides a phased array radar comprising the frequency conversion feed network microwave circuit board of any of the above embodiments. In this embodiment, the frequency conversion feed network microwave circuit board comprises a power division printed circuit substrate and a frequency conversion feed assembly. The frequency conversion feed assembly comprises a power divider, a frequency source, a radio frequency switch and a plurality of frequency converters. The power divider, the frequency source and the radio frequency switch are arranged on a first surface of the power division printed circuit substrate, and the plurality of frequency converters are arranged on a second surface of the power division printed circuit substrate. An input of the power divider is configured to receive a reference signal, an output of the power divider is connected to an input of the frequency source, an output of the frequency source is connected to a first input of the radio frequency switch, a second input of the radio frequency switch is configured to receive an external local oscillator signal, and outputs of the radio frequency switch are configured to be connected to inputs of the plurality of frequency converters through a power division network in the power division printed circuit substrate, respectively. Antenna ends of the plurality of frequency converters are configured to receive antenna signals, and a plurality of outputs of the plurality of frequency converters are configured to output intermediate frequency signals through a combining network of the power division printed circuit substrate. The power divider, the frequency source and the radio frequency switch are closely arranged on the first surface, and the plurality of frequency converters are closely arranged on the second surface. The power divider, the frequency source and the radio frequency switch are connected to the plurality of frequency converters through internal circuit networks of the power division printed circuit substrate, so that frequency conversion and synthesis of radio frequency signals, power division and synthesis are realized, transmission of the radio frequency signals is facilitated, integration of the phased array radar is improved, and size and weight of the phased array radar are effectively reduced.

[0045] The above embodiments only express several embodiments of the application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the application, several modifications and improvements can be made, which are within the scope of the application. Therefore, the scope of protection of the patent of the application should be subject to the appended claims.

Claims

1. A microwave circuit board for a frequency conversion feeder network, characterized in that, include: Power distribution printed circuit board. A frequency converter power supply assembly includes a power divider, a frequency source, an RF switch, and multiple frequency converters. The power divider, the frequency source, and the RF switch are all disposed on the first side of the power divider printed circuit board, and the multiple frequency converters are all disposed on the second side of the power divider printed circuit board. The input terminal of the power divider is used to receive a reference signal, and the output terminal of the power divider is connected to the input terminal of the frequency source. The output terminal of the frequency source is connected to the first input terminal of the RF switch, and the second input terminal of the RF switch is used to receive an external local oscillator signal. The output terminal of the RF switch is used to connect to the input terminal of each frequency converter through a power dividing network in the power divider printed circuit board. The antenna terminal of each frequency converter is used to receive an antenna signal, and the multiple output terminals of the frequency converters output an intermediate frequency signal through a combining network of the power divider printed circuit board. The circuit includes eight frequency converters. The output terminal of the radio frequency switch is connected to the input terminal of the 1-to-8 power divider in the power divider printed circuit board. The output terminal of the 1-to-8 power divider is connected to the input terminal of each frequency converter. The microwave circuit board of the frequency converter feed network also includes a carrier pad disposed on the first surface. The carrier pad is disposed in the first pad area of ​​the power divider printed circuit board. The carrier pad is connected to the input terminal of the power divider and the second input terminal of the radio frequency switch. The carrier pad has a reference signal terminal and an external local oscillator signal terminal to receive the reference signal and the external local oscillator signal.

2. The microwave circuit board for the frequency conversion power supply network according to claim 1, characterized in that, There are two frequency sources, and the two split-output terminals of the power divider are respectively connected to the input terminal of one of the frequency sources.

3. The microwave circuit board for the frequency conversion power supply network according to claim 2, characterized in that, There are two radio frequency switches, and the output terminal of each frequency source is connected to the first input terminal of one of the radio frequency switches.

4. The microwave circuit board for the frequency conversion power supply network according to claim 3, characterized in that, One of the radio frequency switches receives a first external local oscillator signal at its second input terminal, and the other radio frequency switch receives a second external local oscillator signal at its second input terminal.

5. The microwave circuit board for the frequency conversion power supply network according to claim 1, characterized in that, The carrier pad also has a combining terminal, which is connected to the output terminal of the frequency converter through the combining network of the power divider printed circuit board.

6. The microwave circuit board for the frequency conversion power supply network according to claim 1, characterized in that, The microwave circuit board of the frequency conversion power supply network also includes control signal connector pads and power connector pads disposed on the first surface. The control signal connector pads are connected to the control terminals of the power divider, the frequency source and the RF switch respectively through the control network in the power divider printed circuit board. The power connector pads are connected to the power supply terminals of the power divider, the frequency source and the RF switch respectively through the power supply network in the power divider printed circuit board.

7. The microwave circuit board for the frequency conversion power supply network according to claim 1, characterized in that, The microwave circuit board of the frequency conversion power supply network also includes an antenna end signal connector pad disposed on the second surface. The antenna end signal connector pad is connected to the antenna end of the frequency converter through the antenna network in the power divider printed circuit board.

8. A phased array radar, characterized in that, Includes the frequency conversion power supply network microwave circuit board as described in any one of claims 1 to 7.

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