Full-duplex Ka up-down conversion channel

Abstract

The invention provides a full-duplex Ka up-down conversion channel which comprises a carrier plate, a Ka up-down conversion channel connected to the upper surface of the carrier plate, a Ka up-conversion channel, a frequency synthesizer circuit, a cavity filter, a high local oscillator dot frequency PDRO, a low local oscillator dot frequency PLS, a constant-temperature crystal oscillator connected to the lower surface of the carrier plate, a clock and a control circuit. The method is not limited to only complete a single function of up-conversion or down-conversion, can support simultaneous work of an up-conversion channel and a down-conversion channel of the same or similar frequency points while supporting multiple working modes and multi-channel work, can realize good spatial isolation, and avoids frequency crosstalk caused by simultaneous work of the similar frequency points; compared with an existing frequency conversion channel, two paths of high-stability clock signal channels are added, related reference clock signals can be provided for the outside, especially when the frequency conversion channel is applied to an information processor, matching of the frequency conversion channel serving as a radio frequency front end and other modules including a base band and a control module is more flexible, the integration degree is increased, and space is saved.

Description

Technical Field

[0001] The invention relates to the technical field of electrical components, and in particular to a full-duplex Ka up-down frequency conversion channel. Background Art

[0002] The RF channel is divided into a receiving channel and a transmitting channel. The former is used to down-convert the RF signal from the antenna to an intermediate frequency signal that can be processed by the digital baseband module, and the latter is used to up-convert the intermediate frequency signal from the digital baseband module to an RF signal. Currently, in space communications, the Ka band has the advantages of large available communication capacity, wide bandwidth, high transmission quality, and small equipment size compared to other bands. Therefore, the Ka band is the main band used in space communications.

[0003] The communication payload is mainly composed of a transceiver phased array antenna and a channel transceiver processor. The frequency conversion channel module and the clock module are important components of the signal transceiver processor. When processing the RF signal from the receiving antenna, the frequency conversion channel works in the down-conversion mode; when it is necessary to process the intermediate frequency signal from the baseband and transmit the processed signal to the transmitting antenna, the frequency conversion channel works in the up-conversion mode. When the transceiver phased array antenna has two or even more arrays, this requires the frequency conversion channel to be able to realize two or more channels working simultaneously, especially when the communication payload needs to realize duplex communication, the frequency conversion channel needs to realize up-conversion and down-conversion at the same time. Great requirements are placed on the flexibility, isolation, and volume of the frequency conversion channel.

[0004] Therefore, a duplex frequency conversion channel is needed that is flexible in conversion, has high isolation and can meet the volume requirements of space communication. Summary of the invention

[0005] The present invention is to solve the flexibility, isolation and volume requirements of the radio frequency channel, and provides a full-duplex Ka up-down conversion channel. A Ka up-conversion module, a Ka up-down conversion module and a clock circuit are integrated on a single carrier board, and five different working modes are switched through control signals, and at most two frequency conversion channels and two clock channels can work simultaneously. In one working mode, the up-down conversion channel and the down-conversion channel work simultaneously, which can achieve a full-duplex effect.

[0006] The present invention provides a full-duplex Ka up-down frequency conversion channel, comprising a carrier board, a Ka up-down frequency conversion channel connected to the upper surface of the carrier board, a Ka up-conversion channel, a frequency synthesis circuit, a cavity filter, a high local oscillator point frequency PDRO, a low local oscillator point frequency PLS, a constant temperature crystal oscillator connected to the lower surface of the carrier board, a clock and a control circuit;

[0007] The Ka up-down conversion channel and the Ka up-conversion channel are both micro-assembly modules and are interconnected with the frequency synthesis circuit and the cavity filter. The cavity filter and the high local oscillator point frequency PDRO are interconnected with the frequency synthesis circuit. The clock and control circuit are interconnected with the Ka up-down conversion channel, the Ka up-conversion channel and the frequency synthesis circuit.

[0008] The Ka up-down conversion channel can receive the Ka RF signal and down-convert it to a VHF signal output, the Ka up-down conversion channel can receive the VHF signal and up-convert it to a Ka RF signal output, the Ka up-conversion channel can receive the VHF signal and up-convert it to a Ka RF signal output, the frequency synthesis circuit includes a power divider, the cavity filter is used to suppress the image frequency spurious, the high local oscillator point frequency PDRO and the low local oscillator point frequency PLS provide local oscillator signals for the Ka up-down conversion channel and the Ka up-conversion channel, the constant temperature crystal oscillator provides the clock signal, and the clock and control circuit is powered, controlled and outputs the clock;

[0009] The Ka up / down conversion channel and the Ka up conversion channel can realize five modes under the control signal of the clock and control circuit, including: only the Ka up / down conversion channel transmission mode, only the Ka up / down conversion channel reception mode, only the Ka up conversion channel transmission mode, the Ka up / down conversion channel and the Ka up conversion channel transmission mode, and the full-duplex mode;

[0010] When the Ka up-down conversion channel and the Ka up-conversion channel perform up-conversion, the VHF signal is first converted to the S band and then converted to the Ka band for output. When the Ka up-down conversion channel performs down-conversion, the Ka band signal is first converted to the S band and then converted to the VHF band for output.

[0011] In a full-duplex Ka up-down conversion channel of the present invention, as a preferred embodiment, the frequency synthesis circuit includes a first power division circuit connected to a high local oscillator point frequency PDRO and a second power division circuit connected to a low local oscillator point frequency PLS;

[0012] The Ka up-down conversion channel includes a first selection switch, a first combiner, a first frequency converter, a second combiner, a third combiner, a second frequency converter and a fourth combiner which are connected in sequence. The first frequency converter is connected to a high local oscillator point frequency PDRO through a first power division circuit, the second frequency converter is connected to a low local oscillator point frequency PLS through a second power division circuit, the first selection switch is connected to a cavity filter, the fourth combiner is a VHF signal receiving end and output end, and the first combiner, the second combiner, the third combiner and the fourth combiner are all connected to a clock and control circuit;

[0013] The Ka up-conversion channel includes a third frequency converter and a fourth frequency converter connected in sequence, the third frequency converter is connected to the high local oscillator point frequency PDRO through a first power division circuit, and the fourth frequency converter is connected to the low local oscillator point frequency PLS through a second power division circuit, and the first power division circuit and the second power division circuit are respectively located under the shielding cover;

[0014] The high local oscillator frequency PDRO outputs a high local oscillator signal to the Ka up-and-down conversion channel and the Ka up-conversion channel, and the low local oscillator frequency PLS outputs a low local oscillator signal to the Ka up-and-down conversion channel and the Ka up-conversion channel. The frequency of the high local oscillator signal is greater than the frequency of the low local oscillator signal.

[0015] The full-duplex Ka up-down conversion channel of the present invention, as a preferred embodiment, the Ka up-down conversion channel further includes a first dielectric filter and a second dielectric filter connected in parallel between the second combiner and the third combiner;

[0016] The Ka up-conversion channel also includes a third dielectric filter connected between the third frequency converter and the fourth frequency converter;

[0017] The first dielectric filter, the second dielectric filter and the third dielectric filter are all used to filter out clutter signals of the VHF signal.

[0018] In the full-duplex Ka up / down conversion channel of the present invention, as a preferred embodiment, the first power division circuit is interconnected with the Ka up / down conversion channel and the Ka up conversion channel by lap welding, and the second power division circuit is interconnected with the Ka up / down conversion channel and the Ka up conversion channel by lap welding;

[0019] The high local oscillator frequency PDRO and the low local oscillator frequency PLS are in the normally open state.

[0020] The full-duplex Ka up and down conversion channel described in the present invention is, as a preferred method, a constant temperature crystal oscillator outputs a 10M signal to a high local oscillator frequency PDRO and a low local oscillator frequency PLS, the signal frequency output by the high local oscillator frequency PDRO is 24.54 GHz, the signal frequency output by the low local oscillator frequency PLS is 3.4 GHz, the frequency of the VHF signal is 60M, and the frequency of the Ka signal is 28 GHz.

[0021] In the full-duplex Ka up-down conversion channel of the present invention, as a preferred embodiment, the signal input and output of the Ka up-down conversion channel and the Ka up-conversion channel both use SMP connectors, and the signal input of the cavity filter uses an SMP plug-in connector;

[0022] The frequency synthesizer circuit includes a power supply circuit, a control circuit, a telemetry circuit and a local oscillator circuit;

[0023] The clock and control circuit includes a power supply circuit, a clock circuit and a control circuit. The power supply circuit, the clock circuit and the control circuit are interconnected with the Ka up-down frequency conversion channel, the Ka up-conversion channel and the frequency synthesis circuit.

[0024] The full-duplex Ka up-down conversion channel of the present invention, as a preferred embodiment, comprises a first micro-assembly module housing and a first DC connector connected to the side of the first micro-assembly module housing, a first wave bead needle, a second wave bead needle, a third wave bead needle, a fourth wave bead needle, and a first SMP connector;

[0025] The first DC connector is sintered on both sides of the first micro-assembly module housing and interconnected with the pads of the clock and control circuit through flying wires, and the first DC connector transmits power supply signals, control signals and telemetry signals;

[0026] The first wave bead needle, the second wave bead needle, the third wave bead needle and the fourth wave bead needle are respectively connected to the transmission line between the high local oscillator point frequency PDRO and the low local oscillator point frequency PLS through lap welding to transmit the intermediate frequency signal, the high local oscillator signal and the low local oscillator signal;

[0027] The first SMP connector is a Ka signal external interface for transmitting the Ka signal and is connected to the cavity filter;

[0028] The Ka up-conversion channel includes a second micro-assembly module housing, a second DC connector connected to the side of the second micro-assembly module housing, a fifth wave bead needle, a sixth wave bead needle, a seventh wave bead needle, and a second SMP connector;

[0029] The second DC connector is sintered on both sides of the second micro-assembly module housing and interconnected with the pads of the clock and control circuit through flying wires, and the second DC connector transmits power supply signals, control signals and telemetry signals;

[0030] The fifth wave bead needle, the sixth wave bead needle, and the seventh wave bead needle are respectively connected to the high local oscillator frequency PDRO and the low local oscillator frequency PLS through the form of lap welding and the transmission line between the printed circuit boards to transmit the intermediate frequency signal, the high local oscillator signal, and the low local oscillator signal;

[0031] The second SMP connector is a Ka signal external interface for transmitting the Ka signal and is connected to the cavity filter.

[0032] The full-duplex Ka up and down frequency conversion channel described in the present invention is preferably interconnected by a constant temperature crystal oscillator and a frequency synthesis circuit through a constant temperature crystal oscillator reference clock pad, a coaxial sub and a frequency synthesis circuit reference clock pad by layer penetration and lap welding.

[0033] The full-duplex Ka up / down conversion channel described in the present invention, as a preferred embodiment, the control method of the full-duplex Ka up / down conversion channel comprises the following steps:

[0034] S1, the clock and control circuit controls the working mode of the full-duplex Ka up and down conversion channel. The Ka up and down conversion channel only transmits in step S2, the Ka up and down conversion channel only receives in step S3, the Ka up and down conversion channel only transmits in step S4, the Ka up and down conversion channel and the Ka up conversion channel both transmit in step S5, and the full-duplex mode enters step S6;

[0035] S2, the clock and control circuit outputs the T2 signal to the Ka up-down conversion channel, only the up-conversion channel of the Ka up-down conversion channel works, receives the VHF signal and mixes it with the low local oscillator signal output by the low local oscillator point frequency PLS to output the S-band signal, the S-band signal is mixed with the high local oscillator signal output by the high local oscillator point frequency PDRO to output the Ka-band signal, and the Ka-band signal is output to the cavity filter to suppress the image frequency spurious backward space radiation;

[0036] S3, the clock and control circuit outputs the R signal to the Ka up-down conversion channel, only the down-conversion channel of the Ka up-down conversion channel works, the Ka-band signal is output to the cavity filter to suppress the image frequency spurious and then output to the Ka up-down conversion channel, the Ka-band signal is mixed with the high local oscillator signal output by the high local oscillator point frequency PDRO and then outputs the S-band signal, the S-band signal is mixed with the low local oscillator signal output by the low local oscillator point frequency PLS and then down-converted to the VHF band and outputs the VHF signal;

[0037] S4, the clock and control circuit outputs the T1 signal to the Ka up-conversion channel, and only the Ka up-conversion channel works, receives the VHF signal and mixes it with the low local oscillator signal output by the low local oscillator point frequency PLS to output the S-band signal, and the S-band signal is mixed with the high local oscillator signal output by the high local oscillator point frequency PDRO to output the Ka-band signal, and the Ka-band signal is output to the cavity filter to suppress the image frequency spurious backward space radiation;

[0038] S5, the clock and control circuit outputs the T2 signal to the Ka up-conversion channel, and outputs the T1 signal to the Ka up-conversion channel at the same time. The up-conversion channel of the Ka up-conversion channel and the Ka up-conversion channel are both working, both receive the VHF signal and output the Ka-band signal after performing two up-conversions. The Ka-band signal is output to the cavity filter to suppress the image frequency spurious radiation to the back space;

[0039] S6, the clock and control circuit outputs the R signal to the Ka up-and-down conversion channel, and outputs the T1 signal to the Ka up-and-down conversion channel at the same time. The down-conversion channel and the Ka up-conversion channel of the Ka up-and-down conversion channel are both working. The down-conversion channel of the Ka up-and-down conversion channel receives the Ka-band signal and performs two down-conversions before outputting a VHF signal; the Ka up-conversion channel receives the VHF signal and performs two up-conversions before outputting a Ka-band signal. The Ka-band signal is output to the cavity filter to suppress the image frequency spurious backward spatial radiation.

[0040] The full-duplex Ka up-down frequency conversion channel of the present invention, as a preferred embodiment, further comprises a clock PLS connected to the back of the carrier board; the constant temperature crystal oscillator outputs a 10M signal which is output to the clock PLS after passing through a power divider amplifier circuit, and the clock PLS can output a high-stable 80M signal and a high-stable 10M signal and output them to the outside of the full-duplex Ka up-down frequency conversion channel through a first SMA connector and a second SMA connector;

[0041] The Ka up-down conversion channel and the Ka down-conversion channel also include amplifiers and power amplifiers.

[0042] The clock module is based on a high-stable constant temperature crystal oscillator, and provides a high-stable clock signal for the baseband and control modules in the signal processor through phase locking, amplification, filtering and other circuits. Under the general direction of miniaturization and integration in space communication projects, the design of the full-duplex Ka up and down frequency conversion channel and clock module can achieve the dual-channel design purpose of working simultaneously with up and down frequency conversion channels in the space of a single carrier board, while integrating the frequency conversion channel and the clock channel, thus reducing the space and weight occupied by the product and improving the space utilization and system flexibility.

[0043] The present invention has the following advantages:

[0044] Compared with the existing multi-channel frequency conversion channels, the present invention is not limited to completing only a single function of up-conversion or down-conversion. While supporting multiple working modes and multi-channel work, the present invention can support the up-conversion channel and the down-conversion channel of the same or similar frequency to work at the same time, and can achieve good spatial isolation to avoid frequency crosstalk caused by the simultaneous operation of similar frequencies; in other functions, compared with the existing frequency conversion channels, the present invention adds two high-stable clock signal channels, which can provide relevant reference clock signals to the outside. Especially when applied to information processing machines, it is more flexible as a RF front end to cooperate with other modules including baseband and control modules, which increases integration and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A block diagram of a full-duplex Ka up-down conversion channel;

[0046] Figure 2 A schematic diagram of each RF channel link of a full-duplex Ka up-down conversion channel;

[0047] Figure 3 A schematic diagram of a channel link in which both the Ka up-down conversion channel and the Ka up-conversion channel of a full-duplex Ka up-down conversion channel are in transmit mode;

[0048] Figure 4 A schematic diagram of a full-duplex mode channel link of a full-duplex Ka up-down conversion channel;

[0049] Figure 5 A schematic diagram of a micro-assembly module of a full-duplex Ka up-down frequency conversion channel Ka up-down frequency conversion channel;

[0050] Figure 6 A schematic diagram of a micro-assembly module of a full-duplex Ka up-down conversion channel and a Ka up-conversion channel;

[0051] Figure 7 is a side view of a full-duplex Ka up-down conversion channel;

[0052] Figure 8 It is a schematic diagram of the front structure of a full-duplex Ka up-down conversion channel;

[0053] Fig. 9 It is a schematic diagram of the back structure of a full-duplex Ka up-down conversion channel;

[0054] Fig.10 A coaxial subsection diagram of an inter-board clock signal interconnection for a full-duplex Ka up-down conversion channel;

[0055] Fig.11 The schematic diagram of a constant temperature crystal oscillator for a full-duplex Ka up-down conversion channel is shown below;

[0056] Fig.12 The present invention is a flow chart of a method for using a full-duplex Ka up-down conversion channel.

[0057] Reference numerals:

[0058] 1. Carrier board; 2. Ka up-and-down frequency conversion channel; 21. First selection switch; 22. First combiner; 23. First frequency converter; 24. Second combiner; 25. Third combiner; 26. Second frequency converter; 27. Fourth combiner; 28. First dielectric filter; 2A. First micro-assembly module housing; 2B. First DC connector; 2C. First bead pin; 2D. Second bead pin; 2E. Third bead pin; 2F. Fourth bead pin; 2G. First SMP connector; 823. Ka up-and-down frequency conversion channel; 31. Third frequency converter; 32. Fourth frequency converter; 33. Second dielectric filter; 3A , second micro-assembly module housing; 3B, second DC connector; 3C, fifth bead pin; 3D, sixth bead pin; 3E, seventh bead pin; 3F, second SMP connector; 4, frequency synthesis circuit; 41, first power division circuit; 42, second power division circuit; 43, frequency synthesis circuit reference clock pad; 5, cavity filter; 6, high local oscillator point frequency PDRO; 7, low local oscillator point frequency PLS; 8, constant temperature crystal oscillator; 81, constant temperature crystal oscillator reference clock pad; 82, coaxial sub; 9, clock and control circuit; 10, clock PLS; 10A, first SMA connector; 10B, second SMA connector. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0060] Example 1

[0061] like Figures 1 to 12 As shown, a full-duplex Ka up and down frequency conversion channel includes three frequency conversion channels and two high-stability clock channels, which are used in transceiver data processors; the frequency conversion channel part processes the signal from the digital baseband module or the receiving antenna, and can realize five different working modes, and can support up to two frequency conversion channels to work simultaneously. When the up and down frequency conversion channels work simultaneously, they can cooperate with the antenna and baseband to realize full-duplex communication; the clock channel part provides the required high-stability clock signal for the baseband and control module in the transceiver data processor.

[0062] The present invention integrates two frequency conversion channels 2 and 3 as well as a power supply circuit, a control circuit, a clock circuit 9 and a frequency synthesis circuit 4 on a single carrier board 1; the single carrier board 1 is an aluminum plate structure, and the front part of the aluminum plate integrates the Ka up and down frequency conversion channels 2, the Ka up frequency conversion channel 3 and the frequency synthesis circuit 4; the back part of the aluminum plate 1 integrates the power supply circuit, the clock circuit and the control circuit 9.

[0063] The aluminum plate structure of the single carrier board 1 is divided into a front side and a back side. The front side integrates the Ka up-and-down conversion channel 2, the Ka up-and-down conversion channel 3 and the driving circuit 4 to realize the mutual conversion between the intermediate frequency and the radio frequency. The Ka up-and-down conversion channel 3 and the Ka up-and-down conversion channel 2 both use micro-assembly modules, and the driving circuit includes the power supply, control, and telemetry circuits of the two channels and the corresponding local oscillator circuits; the back side includes a power supply circuit, a clock circuit, and a control circuit 9 to provide power supply, control, and clock signals for the front side. At the same time, the clock circuit 10 of the back side also has the function of providing clock signals to other modules of the signal processor including the baseband module, the control module, etc.

[0064] The Ka up-conversion channel 3 and the Ka up-down conversion channel 2 of the present invention are both realized in the form of micro-assembly modules, and the Ka up-conversion channel 3 realizes the up-conversion function; the Ka up-down conversion channel 2 realizes the non-simultaneous operation of the up-conversion and down-conversion channels through different control signals. The two micro-assembly modules adopt the secondary frequency conversion form, with a large frequency conversion range, and can both realize the frequency conversion between the intermediate frequency (UHF frequency band) and the Ka signal; the external RF interfaces of the two micro-assembly modules include the intermediate frequency signal interface, the Ka signal interface, the high local oscillator input interface, and the low local oscillator input interface; the external DC signal interface includes the power supply, control, and telemetry interfaces, all of which are concentrated on the DC connector sintered on the side of the micro-assembly module.

[0065] The form of micro-assembly module is the basic form of miniaturized frequency conversion channel at present, which is usually in the form of bare chip, printed circuit board and structural parts. In the present invention, the two frequency conversion channels use the form of micro-assembly module to solve the problem of space occupation; at the same time, the micro-assembly module uses the flying wire of the connector to solve the interconnection between the power supply and the control signal; all the radio frequency interfaces and the printed circuit board use the form of glass bead needle and printed circuit board lap welding to realize the interconnection between the radio frequency signal and the printed circuit board.

[0066] The parts that need to be interconnected between the front and back parts of the aluminum plate 1 of the present invention, including power supply, control, telemetry, and clock signals, are interconnected by means of flying wires and coaxial sub-82. Since the upper and lower parts of the aluminum plate are back-to-back structures, the interconnection of the upper and lower sides of the power supply, control, and telemetry signals is processed by flying wires, and the interconnection of the front and back sides of the clock signal is interconnected by coaxial sub-82 through the layer and lap-welded microstrip lines. If the front and back sides of the carrier are regarded as two parts, the interconnection interface between the two parts mainly includes power supply, control, telemetry, and clock signals. The front and back parts of the carrier are back-to-back structures, so the power supply, control, and telemetry signals can be interconnected through a small section of flying wire; the characteristic wavelength of the clock signal is relatively long, and the use of a small section of coaxial sub-layer can not only avoid the space requirements brought by the use of cables, but also maintain impedance matching, avoid excessive signal insertion loss, and realize the interconnection of clock signals on the upper and lower sides.

[0067] The front and back sides of the single-carrier aluminum plate 1 structure use FR4 printed boards as driving printed boards to realize various functions. The printed board 9 on the back of the aluminum plate has a 206-core connector of the Guihang HRM series, which is the power supply and control interface between the channel and the clock module and the entire signal machine. Due to space limitations, the front printed board no longer has a 206-core connector, so all kinds of signals required by the front printed board are interconnected by the back printed board through other means. The power supply, control, and telemetry signals are all low-frequency signals, and they are interconnected through the "flying line area" in the structure through flying lines; the clock signal, as a radio frequency signal with a large characteristic wavelength, abandons the way of connecting through cables, and directly passes through the aluminum plate in the normal direction of the printed board by a coaxial sub, and both sides of the coaxial sub are welded with the microstrip lines on the front and back printed boards, so that the clock signal in the back printed board can be transmitted to the front printed board with very little space occupation. The clock signal will work as the clock reference of the local oscillator circuit of the front printed board.

[0068] Regardless of the working mode, the high and low local oscillator signals of the present invention use a power divider to provide local oscillator signals to two micro-assembly modules at the same time. The high local oscillator signal is generated by PDRO6, and the reference input and local oscillator signal output of the module are interconnected with the printed circuit board in the form of bead pin lap welding to the printed circuit board; the local oscillator signal on the printed circuit board is interconnected with the micro-assembly modules 2 and 3 after passing through the power dividers 41 and 42, thereby realizing the provision of local oscillator signals to two frequency conversion micro-assembly modules at the same time in a very small space.

[0069] The local oscillator signals required for the normal operation of the two micro-assembly modules 2 and 3 are local oscillator signals at the same frequency point. In the present invention, the high local oscillator signal is generated by the frequency point PDRO6, and the low local oscillator signal is generated by the frequency point PLS7. Both local oscillator signals are output by a single pin. At this time, the local oscillator signal is input to the micro-assembly modules 2 and 3 in the form of lap welding through a power divider. In the case of continuous input of the local oscillator signal, whether the three frequency conversion channels of the two micro-assembly modules 2 and 3 work is determined only by the control signal of each channel, and there is no need to control the input and output of the local oscillator signal separately; at the same time, there is an isolator in the local oscillator link in the micro-assembly module, which avoids the local oscillator signal from generating spurious in space due to the reflection of the local oscillator signal when the channel is not working.

[0070] The Ka signal output of the micro-assembly module of the present invention uses SMP connectors 2G and 3F, and the connectors use SMP-KK connectors to directly hard-connect with the cavity filter. Both micro-assembly modules realize the connection between the micro-assembly module and the cavity filter in this form. At this time, no matter what working mode or working frequency, good shielding properties are achieved.

[0071] The Ka signal input / output part of the micro-assembly modules 2 and 3 uses an SMP socket, and the input port of the cavity filter 5 also uses an SMP socket. The two are hard-connected using an SMP-KK connector. All Ka part signals will not pass through the printed circuit board, and the shielding performance is good. Even if the two micro-assembly modules work at the same time, the two Ka signals will not affect each other, and the spatial shielding performance is above 120dBc.

[0072] like Figure 1 It is a block diagram of the composition of the present invention, that is, the basic form of the present invention, including Ka up-conversion channel 3, Ka up-down conversion channel 2, power supply circuit, control circuit, clock circuit and the like.

[0073] like Figures 2 to 4 The control link block diagram and each working mode diagram of the present invention are shown, and the control signals T1, T2, and R signals are respectively Figure 2 The link shown (Ka up-conversion channel 3), Figure 3 The link shown (the transmission part of Ka up-conversion channel 2), Figure 4 The link shown (the receiving part of the Ka up and down conversion channel 2) realizes five different working modes by controlling three signals, including the links No. 1, 2, and 3 working separately, the links No. 1 and 2 working simultaneously, and the links No. 1 and 3 working simultaneously; among them, when the links No. 1 and 3 work simultaneously, the receiving parts of the Ka up and down conversion channels and the Ka up and down conversion channels work simultaneously, and this working mode realizes the full-duplex working mode of the frequency conversion channel.

[0074] like Figure 5 , 6 The figure shows the three-dimensional appearance of two micro-assembly modules in the present invention, namely, Ka up-down conversion channel 2 and Ka up-conversion channel 3. The external interfaces of the two conversion channels are composed of direct current and radio frequency external interfaces. Figure 5 Medium DC connector 2B, Figure 6 The DC connector 3B is used as a DC external interface, sintered on the side of the micro-assembly module, and is used to transmit power supply, control, and telemetry signals, and is interconnected with the relevant pads of the printed circuit board through flying wires; Figure 5 Medium SMP connector 2G, Figure 6 The SMP connector 3F in the middle is used as the external interface of the Ka signal, for transmitting the Ka signal, and is directly interconnected with the cavity filter through the SMP-KK connector; Figure 5 Medium glass bead needle 2C, 2D, 2E, 2F, Figure 6 The glass bead needles 3C, 3D, and 3E are intermediate frequency, high and low local oscillator interfaces, which are used to transmit intermediate frequency and high and low local oscillator signals, and are connected to the transmission lines between the printed circuit boards through lap welding.

[0075] like Figure 7 It is a schematic diagram of the architecture of each part of the present invention, and each part is distributed on the front and back of the carrier board 1. The front part includes Ka up-down frequency conversion channel 2, Ka up-conversion channel 3, frequency synthesis circuit 4, and the back part includes constant temperature crystal oscillator 8, clock circuit and control circuit 9. In terms of the interconnection between the front and back parts, the power supply, control, and telemetry signals are interconnected in the form of flying wires through the DC pads on the front and back; the clock signal is interconnected in the form of directly penetrating the layers and lap welding through the reference clock pads 81 on the front and back in the form of coaxial sub 82.

[0076] like Figure 8 The front view of the present invention is shown, which consists of Ka up-down conversion channel 2, Ka up-conversion channel 3, frequency synthesis circuit printed board 4, cavity filter 5, high local oscillator frequency PDRO6, and low local oscillator frequency PLS7. The high and low local oscillators are input into the two micro-assembly modules 2 and 3 by the power divider circuit 41 and 42 on the frequency synthesis circuit printed board 4. The power divider circuit 41 and 42 are under the shielding cover. The shielding cover can shield the high and low local oscillator signals to avoid releasing clutter signals into the space. The Ka signals of the two micro-assembly modules 2 and 3 are directly interconnected with the cavity filter 5 through the SMP-KK connector 2G and 3F. The signal does not pass through any other transmission line, achieving high shielding performance. In terms of front and back interconnection, the clock signal is interconnected with the back part by the coaxial sub 82, and the DC signal is interconnected with the back part through the flying wire from the flying wire hole.

[0077] like Fig. 9The back view of the present invention is shown, which is composed of a constant temperature crystal oscillator 8, a power supply, control, clock circuit printed board 9, and a clock PLS 10. The high stable clock signal output by the constant temperature crystal oscillator is connected to the printed board 9 through a cable, and the 10M and 80M high stable clock signals are respectively output by SMA connectors 10A and 10B as their output interfaces for use by other modules. The reference clock signal required by the frequency synthesis circuit of the front part is interconnected with the front part by a coaxial sub 82, and the DC signal required by the front part is interconnected with the front part through a flying line from the flying line hole.

[0078] like Fig.10 The figure shows a cross-sectional view of the coaxial sub 82 for interconnecting clock signals between boards. This perspective is the normal perspective of the printed circuit board. The clock signal passes through the carrier board 1 from the coaxial sub 82, and the needles at the upper and lower ends of the coaxial sub are respectively soldered to the microstrip lines of the front printed circuit board 4 and the back printed circuit board 9 to realize the transmission of the clock signal.

[0079] Example: Dual-channel operation: When VHF is 60M and Ka signal is 28GHz; Figure 1 The point frequency PLS is 3.4G, and the point frequency PDRO is 24.54G (the reference frequency of the two phase-locked sources is 10M). At this time, the up and down conversion between 60M and 28G can be achieved. The frequency change is shown in the figure below. PLS and PDRO are respectively in the normally open state as the low local oscillator and the high local oscillator. The existence of the power divider can realize the low and high local oscillators of the two micro-assembly modules in the normally added state.

[0080] like Fig.12 As shown, the five working modes of the present invention are as follows:

[0081] The power supply of each channel is controlled. Assuming that the control signals of each channel are T1, T2, and R, as shown in the following table, the level value working mode of each control signal is:

[0082]

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A full-duplex Ka up-down conversion channel, characterized in that: It comprises a carrier board (1), a Ka up-down frequency conversion channel (2) connected to the upper surface of the carrier board (1), a Ka up-conversion channel (3), a frequency synthesizer circuit (4), a cavity filter (5), a high local oscillator point frequency PDRO (6), a low local oscillator point frequency PLS (7), a constant temperature crystal oscillator (8) connected to the lower surface of the carrier board (1), and a clock and control circuit (9); The Ka up / down conversion channel (2) and the Ka up / down conversion channel (3) are both micro-assembly modules and are interconnected with the frequency synthesis circuit (4) and the cavity filter (5); the cavity filter (5) and the high local oscillator point frequency PDRO (6) are interconnected with the frequency synthesis circuit (4); the clock and control circuit (9) is interconnected with the Ka up / down conversion channel (2), the Ka up / down conversion channel (3) and the frequency synthesis circuit (4); The Ka up-down conversion channel (2) can receive a Ka radio frequency signal and down-convert it to a VHF signal output, the Ka up-down conversion channel (2) can receive a VHF signal and up-convert it to a Ka radio frequency signal output, the Ka up-conversion channel (3) can receive a VHF signal and up-convert it to a Ka radio frequency signal output, the frequency synthesizer circuit (4) includes a power divider, the cavity filter (5) is used to suppress image frequency spurious, the high local oscillator point frequency PDRO (6) and the low local oscillator point frequency PLS (7) provide local oscillator signals for the Ka up-down conversion channel (2) and the Ka up-conversion channel (3), the constant temperature crystal oscillator (8) provides a clock signal, and the clock and control circuit (9) performs power supply, control and output clock; The Ka up / down conversion channel (2) and the Ka up / down conversion channel (3) can realize five modes under the control signal of the clock and control circuit (9), including: a Ka up / down conversion channel transmission mode only, a Ka up / down conversion channel reception mode only, a Ka up / down conversion channel transmission mode only, a Ka up / down conversion channel and a Ka up / down conversion channel transmission mode, and a full-duplex mode; When the Ka up-down conversion channel (2) and the Ka up-conversion channel (3) perform up-conversion, the VHF signal is first converted to the S band and then converted to the Ka band for output; when the Ka up-down conversion channel (2) performs down-conversion, the Ka band signal is first converted to the S band and then converted to the VHF band for output.

2. A full-duplex Ka up-down conversion channel according to claim 1, characterized in that: The frequency synthesizer circuit (4) comprises a first power division circuit (41) connected to the high local oscillator point frequency PDRO (6) and a second power division circuit (42) connected to the low local oscillator point frequency PLS (7); The Ka up-down conversion channel (2) comprises a first selection switch (21), a first combiner (22), a first frequency converter (23), a second combiner (24), a third combiner (25), a second frequency converter (26) and a fourth combiner (27) which are connected in sequence, the first frequency converter (23) being connected to the high local oscillator point frequency PDRO (6) via the first power division circuit (41), the second frequency converter (26) being connected to the low local oscillator point frequency PLS (7) via the second power division circuit (42), the first selection switch (21) being connected to the cavity filter (5), the fourth combiner (27) being a VHF signal receiving end and output end, the first combiner (22), the second combiner (24), the third combiner (25) and the fourth combiner (27) being all connected to the clock and control circuit (9); The Ka up-conversion channel (3) comprises a third frequency converter (31) and a fourth frequency converter (32) connected in sequence, the third frequency converter (31) is connected to the high local oscillator point frequency PDRO (6) via the first power division circuit (41), the fourth frequency converter (32) is connected to the low local oscillator point frequency PLS (7) via the second power division circuit (42), and the first power division circuit (41) and the second power division circuit (42) are respectively located below the shielding cover; The high local oscillator frequency PDRO (6) outputs a high local oscillator signal to the Ka up-down conversion channel (2) and the Ka up-conversion channel (3), and the low local oscillator frequency PLS (7) outputs a low local oscillator signal to the Ka up-down conversion channel (2) and the Ka up-conversion channel (3), and the frequency of the high local oscillator signal is greater than the frequency of the low local oscillator signal.

3. A full-duplex Ka up-down conversion channel according to claim 2, characterized in that: The Ka up-down conversion channel (2) further comprises a first dielectric filter (28) and a second dielectric filter (29) connected in parallel between the second combiner (24) and the third combiner (25); The Ka up-conversion channel (3) further comprises a third dielectric filter (33) connected between the third frequency converter (31) and the fourth frequency converter (32); The first dielectric filter (28), the second dielectric filter (29) and the third dielectric filter (33) are all used to filter out clutter signals of VHF signals.

4. A full-duplex Ka up-down conversion channel according to claim 2, characterized in that: The first power division circuit (41) is interconnected with the Ka up / down conversion channel (2) and the Ka up / down conversion channel (3) by means of lap welding, and the second power division circuit (42) is interconnected with the Ka up / down conversion channel (2) and the Ka up / down conversion channel (3) by means of lap welding; The high local oscillator point frequency PDRO (6) and the low local oscillator point frequency PLS (7) are in a normally open state.

5. A full-duplex Ka up-down conversion channel according to claim 1, characterized in that: The constant temperature crystal oscillator (8) outputs a 10M signal to the high local oscillator frequency point PDRO (6) and the low local oscillator frequency point PLS (7). The signal frequency output by the high local oscillator frequency point PDRO (6) is 24.54 GHz, the signal frequency output by the low local oscillator frequency point PLS (7) is 3.4 GHz, the frequency of the VHF signal is 60M, and the frequency of the Ka signal is 28 GHz.

6. A full-duplex Ka up-down conversion channel according to claim 1, characterized in that: The signal input and output of the Ka up-down conversion channel (2) and the Ka up-conversion channel (3) both use SMP connectors, and the signal input of the cavity filter (5) uses an SMP plug-in connector; The frequency synthesizer circuit (4) comprises a power supply circuit, a control circuit, a telemetry circuit and a local oscillator circuit; The clock and control circuit (9) comprises a power supply circuit, a clock circuit and a control circuit. The power supply circuit, the clock circuit and the control circuit are interconnected with the Ka up-down conversion channel (2), the Ka up-conversion channel (3) and the frequency synthesizer circuit (4).

7. A full-duplex Ka up-down conversion channel according to claim 1, characterized in that: The Ka up-down conversion channel (2) comprises a first micro-assembly module housing (2A), a first DC connector (2B) connected to the side of the first micro-assembly module housing (2A), a first wave bead needle (2C), a second wave bead needle (2D), a third wave bead needle (2E), a fourth wave bead needle (2F), and a first SMP connector (2G); The first DC connector (2B) is sintered on both sides of the first micro-assembly module housing (2A) and interconnected with the pads of the clock and control circuit (9) through flying wires, and the first DC connector (2B) transmits power supply signals, control signals and telemetry signals; The first wave bead needle (2C), the second wave bead needle (2D), the third wave bead needle (2E), and the fourth wave bead needle (2F) are respectively connected to the high local oscillator point frequency PDRO (6) and the low local oscillator point frequency PLS (7) through the form of lap welding and the transmission line between the printed circuit board to transmit the intermediate frequency signal, the high local oscillator signal, and the low local oscillator signal; The first SMP connector (2G) is a Ka signal external interface for transmitting a Ka signal and is connected to the cavity filter (5); The Ka up-conversion channel (3) comprises a second micro-assembly module housing (3A), a second DC connector (3B) connected to the side of the second micro-assembly module housing (3A), a fifth wave bead needle (3C), a sixth wave bead needle (3D), a seventh wave bead needle (3E), and a second SMP connector (3F); The second DC connector (3B) is sintered on both sides of the second micro-assembly module housing (3A) and interconnected with the pads of the clock and control circuit (9) through flying wires, and the second DC connector (3B) transmits power supply signals, control signals and telemetry signals; The fifth wave bead needle (3C), the sixth wave bead needle (3D), and the seventh wave bead needle (3E) are respectively connected to the high local oscillator point frequency PDRO (6) and the low local oscillator point frequency PLS (7) through the form of lap welding and the transmission line between the printed circuit board to transmit the intermediate frequency signal, the high local oscillator signal and the low local oscillator signal; The second SMP connector (3F) is a Ka signal external interface for transmitting a Ka signal and is connected to the cavity filter (5).

8. A full-duplex Ka up-down conversion channel according to claim 1, characterized in that: The constant temperature crystal oscillator (8) and the frequency synthesizer circuit (4) are interconnected in the form of through-layer and lap welding via a constant temperature crystal oscillator reference clock pad (81), a coaxial pin (82) and a frequency synthesizer circuit reference clock pad (43).

9. A full-duplex Ka up-down conversion channel according to any one of claims 1 to 8, characterized in that: The control method of the full-duplex Ka up-down conversion channel comprises the following steps: S1, the clock and control circuit (9) controls the working mode of the full-duplex Ka up-down conversion channel, the Ka up-down conversion channel only transmits in mode and enters step S2, the Ka up-down conversion channel only receives in mode and enters step S3, the Ka up-down conversion channel only transmits in mode and enters step S4, the Ka up-down conversion channel and the Ka up-conversion channel both transmit in mode and enter step S5, and the full-duplex mode enters step S6; S2, the clock and control circuit (9) outputs a T2 signal to the Ka up-down conversion channel (2), only the up-conversion channel of the Ka up-down conversion channel (2) works, receives a VHF signal and mixes it with a low local oscillator signal output by the low local oscillator point frequency PLS (7) to output an S-band signal, the S-band signal is mixed with a high local oscillator signal output by the high local oscillator point frequency PDRO (6) to output a Ka-band signal, and the Ka-band signal is output to the cavity filter (5) to suppress the image frequency spurious backward space radiation; S3, the clock and control circuit (9) outputs an R signal to the Ka up-down conversion channel (2), only the down conversion channel of the Ka up-down conversion channel (2) works, the Ka band signal is output to the cavity filter (5) to suppress image frequency spurious and then output to the Ka up-down conversion channel (2), the Ka band signal is mixed with the high local oscillator signal output by the high local oscillator point frequency PDRO (6) to output the S band signal, the S band signal is mixed with the low local oscillator signal output by the low local oscillator point frequency PLS (7) to down-convert to the VHF band and output the VHF signal; S4, the clock and control circuit (9) outputs a T1 signal to the Ka up-conversion channel (3), and only the Ka up-conversion channel (3) works to receive a VHF signal and mix it with a low local oscillator signal output by the low local oscillator point frequency PLS (7) to output an S-band signal, and the S-band signal is mixed with a high local oscillator signal output by the high local oscillator point frequency PDRO (6) to output a Ka-band signal, and the Ka-band signal is output to the cavity filter (5) to suppress image frequency spurious backward spatial radiation; S5, the clock and control circuit (9) outputs a T2 signal to the Ka up / down conversion channel (2), and simultaneously outputs a T1 signal to the Ka up / down conversion channel (3); the up / down conversion channel of the Ka up / down conversion channel (2) and the Ka up / down conversion channel (3) both work, both receive the VHF signal and perform two up / down conversions before outputting a Ka-band signal; the Ka-band signal is output to the cavity filter (5) to suppress image frequency spurious radiation into the back space; S6, the clock and control circuit (9) outputs an R signal to the Ka up-down conversion channel (2), and simultaneously outputs a T1 signal to the Ka up-conversion channel (3). The down-conversion channel of the Ka up-down conversion channel (2) and the Ka up-conversion channel (3) are both in operation. The down-conversion channel of the Ka up-down conversion channel (2) receives a Ka-band signal and performs two down-conversions before outputting a VHF signal. The Ka up-conversion channel (3) receives a VHF signal and performs two up-conversions before outputting a Ka-band signal. The Ka-band signal is output to the cavity filter (5) to suppress image frequency spurious backward spatial radiation.

10. A full-duplex Ka up-down conversion channel according to claim 1, characterized in that: It also includes a clock PLS (10) connected to the back of the carrier board (1); the constant temperature crystal oscillator (8) outputs a 10M signal which is output to the clock PLS (10) after passing through a power divider amplifier circuit; the clock PLS (10) can output a high-stability 80M signal and a high-stability 10M signal and output them to the outside of the full-duplex Ka up / down conversion channel through a first SMA connector (10A) and a second SMA connector (10B); The Ka up-down conversion channel (2) and the Ka up-conversion channel (3) also include an amplifier and a power amplifier.

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