Multiband radio frequency signal transmitting and receiving method

Abstract

The invention relates to a multiband radio frequency signal transmitting and receiving method, belongs to the technical field of microwave integrated circuits, and solves the problem that multiband integrated broadband transmitting and receiving are difficult to realize in an existing radio frequency transmitting and receiving mode. The method is divided into a multiband radio frequency signal receiving / transmitting method. The receiving method comprises the following steps of: performing up-conversion on a received radio frequency input signal to a K wave band through first-stage frequency mixing, performing down-conversion on the received radio frequency input signal to an S / C wave band through second-stage frequency mixing, performing down-conversion on the received radio frequency input signal to an L wave band intermediate frequency through third-stage frequency mixing, and generating a first L wave band intermediate frequency output signal; the transmitting method comprises the steps that an obtained second L-band intermediate-frequency output signal is subjected to fourth-stage frequency mixing up-conversion to the S / C band, is subjected to fifth-stage frequency mixing up-conversion to the K band and is subjected to sixth-stage frequency mixing down-conversion to the S / C / X / Ku band, and a radio-frequency output signal is generated; the first-stage frequency mixing up-conversion and the sixth-stage frequency mixing down-conversion are realized by the same bidirectional microwave link working in up-conversion and down-conversion regulation and control states respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave integrated circuits, and in particular, to a multi-band radio frequency signal transceiver method. Background Art

[0002] In the military field, the future intelligent combat requirements of weaponry will rely more on highly integrated electronic information systems. The development of new-generation radars, communications, electronic warfare, and other advanced weaponry has put forward an urgent need for the integration of radio frequency microsystems. The integration of radio frequency microsystems can achieve highly integrated functional modules or subsystems based on new concepts and new processes at the micro-nano scale, and then macroscopically achieve significant reduction in the volume and power consumption of weaponry, significant improvement in performance and reliability, significant reduction in channel cost and the entire life cycle cost, support for multiple functions, and gradually possess intelligence and other characteristics. Electronic countermeasure has become an important factor determining the outcome of modern high-tech wars and an important means to weaken the superior forces of the enemy. Electronic countermeasure equipment has penetrated into all aspects of the military field and plays a decisive role in the combat effectiveness of weapon platforms. Therefore, the struggle between the two sides of the war for the control of the electromagnetic spectrum has become increasingly fierce and has become the core content of modern wars, playing a decisive role in the war. The forms of electronic countermeasure include air-to-air, ground-to-air, air-to-ground, etc. In recent years, there have been more and more confrontations between unmanned aerial vehicles, and the platforms participating in electronic countermeasure are diverse. The wide frequency band, miniaturization, and high integration of microwave systems are an inevitable trend to adapt to various combat platforms.

[0003] In the currently common frequency conversion methods, the receiving channel and the transmitting channel are independent of each other, and it is difficult for radio frequency transceivers to achieve a multi-band integrated broadband transceiver design including S / C / X / Ku bands. Therefore, how to design a multi-band radio frequency signal transceiver method that can achieve a multi-band integrated broadband transceiver design has become a technical problem that urgently needs to be solved at present. Summary of the Invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a multi-band radio frequency signal transceiver method to solve the problem that it is difficult for the existing radio frequency transceiver method to achieve a multi-band integrated broadband transceiver design.

[0005] The present invention discloses a multi-band radio frequency signal transceiver method, including a multi-band radio frequency signal receiving method and a multi-band radio frequency signal transmitting method; wherein,

[0006] The multi-band radio frequency signal receiving method performs:

[0007] Receiving a radio frequency input signal, the radio frequency input signal is up-converted to the K band through the first-stage mixing, and then down-converted to the S / C band through the second-stage mixing, and then down-converted to the L-band intermediate frequency through the third-stage mixing to generate a first L-band intermediate frequency output signal;

[0008] The multi-band radio frequency signal transmitting method performs the following:

[0009] Obtain a second L-band intermediate frequency output signal, which is up-converted to the S / C band through the fourth-stage mixing, then up-converted to the K band through the fifth-stage mixing, and then down-converted to the S / C / X / Ku band through the sixth-stage mixing to generate a radio frequency output signal;

[0010] The first-stage mixing up-conversion and the sixth-stage mixing down-conversion are respectively realized by the same bidirectional microwave link operating in the up-conversion regulation state and the down-conversion regulation state.

[0011] On the basis of the above solution, the present invention has also made the following improvements:

[0012] Further, during the execution of the multi-band radio frequency signal receiving method, the bidirectional microwave link sequentially performs the following:

[0013] The signal obtained by performing gain adjustment on the radio frequency input signal sequentially performs 2-18G multi-channel filtering, first-stage mixing up-conversion, K-band band-pass filtering, and amplification to obtain a first K-band signal.

[0014] Further, during the execution of the multi-band radio frequency signal transmitting method, the bidirectional microwave link sequentially performs the following:

[0015] The second K-band signal up-converted to the K band through the fifth-stage mixing sequentially performs amplification, K-band band-pass filtering, sixth-stage mixing down-conversion, and 2-18G multi-channel filtering to obtain a radio frequency output signal to be adjusted.

[0016] Further, the bidirectional microwave link includes a first single-pole double-throw switch, a 2-18G multi-channel filter, a double-balanced mixer, a K-band band-pass filter, a bidirectional amplifier, and a second single-pole double-throw switch; wherein,

[0017] The first moving terminal and the second moving terminal of the first single-pole double-throw switch are respectively used as the up-conversion regulation input terminal and the down-conversion regulation output terminal; wherein, the up-conversion regulation input terminal is used to receive the signal after gain adjustment, and the down-conversion regulation output terminal is used to output the radio frequency output signal to be adjusted;

[0018] The fixed terminal of the first single-pole double-throw switch is connected to one end of the 2-18G multi-channel filter, the other end of the 2-18G multi-channel filter is connected to the radio frequency terminal RF of the double-balanced mixer, the intermediate frequency terminal IF of the double-balanced mixer is connected to one end of the K-band band-pass filter, and the local oscillator terminal LO of the double-balanced mixer receives the first broadband local oscillator signal;

[0019] One end of the K-band bandpass filter is connected to one end of the bidirectional amplifier, and the other end of the bidirectional amplifier is connected to the fixed end of the second single-pole double-throw switch. The first moving end and the second moving end of the second single-pole double-throw switch are used as the up-conversion regulation output end and the down-conversion regulation input end respectively. Among them, the up-conversion regulation output end is used to output the first K-band signal, and the down-conversion regulation input end is used to receive the second K-band signal.

[0020] Further, when the first moving end and the fixed end of the first single-pole double-throw switch are connected, and the first moving end and the fixed end of the second single-pole double-throw switch are connected, the bidirectional microwave link operates in the up-conversion regulation state, and the double-balanced mixer performs the first-stage mixing up-conversion.

[0021] When the second moving end and the fixed end of the first single-pole double-throw switch are connected, and the second moving end and the fixed end of the second single-pole double-throw switch are connected, the bidirectional microwave link operates in the down-conversion regulation state, and the double-balanced mixer performs the sixth-stage mixing down-conversion.

[0022] Further, during the process of performing the multi-band radio frequency signal receiving method, the gain-adjusted signal is obtained by performing the following operations:

[0023] The received radio frequency input signal is successively subjected to limiting, digital control attenuation, and 2-18G linear amplification to obtain the gain-adjusted signal.

[0024] Further, during the process of performing the multi-band radio frequency signal receiving method, the following operations are performed on the first K-band signal to generate the first L-band intermediate frequency output signal:

[0025] The first K-band signal is subjected to the second-stage mixing down-conversion to obtain the first S / C-band signal. The first S / C-band signal is successively subjected to S / C-band bandpass filtering, the third-stage mixing down-conversion, and L-band filtering amplification to generate the first L-band intermediate frequency output signal.

[0026] Further, during the process of performing the multi-band radio frequency signal receiving method, it further includes:

[0027] The signal after the third-stage mixing down-conversion is input for coupling, and the signal output from the coupling end of the coupler is subjected to pulse detection to determine whether a radio frequency input signal is received.

[0028] Further, during the process of the multi-band radio frequency signal transmitting method, the following operations are performed on the second L-band intermediate frequency output signal to obtain the second K-band signal:

[0029] The second L-band intermediate frequency output signal is successively subjected to the fourth-stage mixing up-conversion, S / C-band bandpass filtering, S / C-band amplification, and the fifth-stage mixing up-conversion to obtain the second K-band signal.

[0030] Further, during the process of the multi-band radio frequency signal transmitting method, the following operations are performed on the radio frequency output signal to be adjusted to generate a radio frequency output signal:

[0031] The radio frequency output signal to be adjusted is successively subjected to 2-18G saturation amplification and electronic attenuation to generate a radio frequency output signal.

[0032] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0033] The multi-band radio frequency signal transceiver method provided by the present invention, by using the same bidirectional microwave link to work in the up-conversion control state and the down-conversion control state respectively during the multi-band radio frequency signal receiving and transmitting processes to achieve the time-division control of mixing up-conversion and mixing down-conversion, that is, the bidirectional control of the microwave link can be realized through the bidirectional control of a set of links, which well solves the problem that it is difficult to realize the multi-band integrated broadband transceiver design in the existing radio frequency transceiver methods.

[0034] Due to the improvement of the bidirectional microwave link, when the multi-band radio frequency signal transceiver method is implemented, the required devices are reduced and the volume is decreased, thus meeting the miniaturization requirements of the corresponding multi-functional frequency conversion device and reducing the design complexity and design cost of the hardware.

[0035] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can be made obvious from the description, or understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained from the content specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings are only for the purpose of showing specific embodiments and are not considered as limiting the present invention. Throughout the drawings, the same reference signs represent the same components;

[0037] Figure 1 It is a flowchart of the multi-band radio frequency signal transceiver method provided by an embodiment of the present invention;

[0038] Figure 2 It is a schematic structural diagram of a miniaturized multi-functional frequency conversion device provided by an embodiment of the present invention;

[0039] Figure 3 It is a specific circuit diagram of a miniaturized multi-functional frequency conversion device provided by an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of intermediate frequency mixing principle provided by an embodiment of the present invention;

[0041] Figure 5This is the schematic diagram of radio frequency mixing provided by the embodiments of the present invention. Detailed implementation manners

[0042] The preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0043] The embodiments of the present invention disclose a multi-band radio frequency signal transceiver method. The flowchart is as Figure 1 shown. The multi-band radio frequency signal transceiver method includes a multi-band radio frequency signal receiving method and a multi-band radio frequency signal transmitting method. Among them,

[0044] The multi-band radio frequency signal receiving method performs:

[0045] Receiving a radio frequency input signal, the radio frequency input signal is up-converted to the K band through the first-stage mixing, then down-converted to the S / C band through the second-stage mixing, and then down-converted to the L-band intermediate frequency through the third-stage mixing to generate a first L-band intermediate frequency output signal.

[0046] The multi-band radio frequency signal transmitting method performs:

[0047] Obtaining a second L-band intermediate frequency output signal, the second L-band intermediate frequency output signal is up-converted to the S / C band through the fourth-stage mixing, then up-converted to the K band through the fifth-stage mixing, and then down-converted to the S / C / X / Ku band through the sixth-stage mixing to generate a radio frequency output signal.

[0048] The first-stage mixing up-conversion and the sixth-stage mixing down-conversion are realized by the same bidirectional microwave link working in the up-conversion regulation state and the down-conversion regulation state respectively.

[0049] Next, the specific process of the multi-band radio frequency signal receiving method is specifically described as follows:

[0050] Step S1: Successively perform limiting, digital control attenuation, and 2-18G linear amplification on the received radio frequency input signal to obtain a gain-adjusted signal.

[0051] Step S2: Successively perform 2-18G multi-channel filtering, first-stage mixing up-conversion, K-band band-pass filtering, and amplification on the gain-adjusted signal to obtain a first K-band signal.

[0052] Step S3: Perform second-stage mixing down-conversion on the first K-band signal to obtain a first S / C-band signal. Successively perform S / C-band band-pass filtering, third-stage mixing down-conversion, and L-band filtering amplification on the first S / C-band signal to generate a first L-band intermediate frequency output signal.

[0053] In addition, the multi-band radio frequency signal receiving method may further include the following steps:

[0054] Step S4: Input the signal after the third-stage mixing and down-conversion into a coupler, and perform pulse detection on the signal output from the coupling end of the coupler to determine whether a radio frequency input signal is received.

[0055] The specific process of the multi-band radio frequency signal transmitting method is described in detail as follows:

[0056] Step C1: Perform fourth-stage mixing and up-conversion, S / C band band-pass filtering, S / C band amplification, and fifth-stage mixing and up-conversion on the second L-band intermediate frequency output signal in sequence to obtain a second K-band signal.

[0057] Step C2: Perform amplification, K-band band-pass filtering, sixth-stage mixing and down-conversion, and 2-18G multi-channel filtering on the second K-band signal in sequence to obtain a radio frequency output signal to be adjusted.

[0058] Step C3: Perform 2-18G saturation amplification and electrical attenuation on the radio frequency output signal to be adjusted in sequence to generate a radio frequency output signal.

[0059] It should be noted that in the above method, the specific processes of Step S2 and Step C2 are both completed by a bidirectional microwave link. This bidirectional microwave link is the core for realizing bidirectional control, and the specific introduction is as follows: The bidirectional microwave link includes a first single-pole double-throw switch, a 2-18G multi-channel filter, a double-balanced mixer, a K-band band-pass filter, a bidirectional amplifier, and a second single-pole double-throw switch; wherein, the first moving terminal and the second moving terminal of the first single-pole double-throw switch are respectively used as the up-conversion control input terminal and the down-conversion control output terminal; wherein, the up-conversion control input terminal is used to receive the signal after gain adjustment, and the down-conversion control output terminal is used to output the radio frequency output signal to be adjusted; the stationary terminal of the first single-pole double-throw switch is connected to one end of the 2-18G multi-channel filter, the other end of the 2-18G multi-channel filter is connected to the intermediate frequency terminal IF of the double-balanced mixer, the radio frequency terminal RF of the double-balanced mixer is connected to one end of the K-band band-pass filter, and the local oscillator terminal LO of the double-balanced mixer receives the first broadband local oscillator signal; the other end of the K-band band-pass filter is connected to one end of the bidirectional amplifier, the other end of the bidirectional amplifier is connected to the stationary terminal of the second single-pole double-throw switch, and the first moving terminal and the second moving terminal of the second single-pole double-throw switch are respectively used as the up-conversion control output terminal and the down-conversion control input terminal; wherein, the up-conversion control output terminal is used to output a first K-band signal, and the down-conversion control input terminal is used to receive a second K-band signal.

[0060] In the specific implementation process, when the first moving end and the fixed end of the first single-pole double-throw switch are connected, and the first moving end and the fixed end of the second single-pole double-throw switch are connected, the bidirectional microwave link operates in the up-conversion regulation state, and the double-balanced mixer performs the first-stage mixing up-conversion; when the second moving end and the fixed end of the first single-pole double-throw switch are connected, and the second moving end and the fixed end of the second single-pole double-throw switch are connected, the bidirectional microwave link operates in the down-conversion regulation state, and the double-balanced mixer performs the sixth-stage mixing down-conversion.

[0061] Another specific embodiment of the present invention discloses a miniaturized multifunctional frequency conversion device that matches the above multi-band radio frequency signal transceiver method. The structural schematic diagram is as Figure 2 shown, and the specific circuit diagram is as Figure 3 shown. It should be emphasized that the bidirectional microwave link in the two embodiments is the same link. The difference is that in the method embodiment, the external relationship of the bidirectional microwave link is described in the way of receiving and transmitting signals, while in the device embodiment, the external relationship of the bidirectional microwave link is described in the way of input and output ports. Specifically, the device includes: a radio frequency input channel, an intermediate frequency output channel, an intermediate frequency input channel, a radio frequency output channel, and a bidirectional microwave link; wherein, the input end of the radio frequency input channel is used to receive a radio frequency input signal, the output end of the radio frequency input channel is connected to the up-conversion regulation input end of the bidirectional microwave link, the up-conversion regulation output end of the bidirectional microwave link is connected to the input end of the intermediate frequency output channel, and the output end of the intermediate frequency output channel is used to output an intermediate frequency output signal; the input end of the intermediate frequency input channel is used to receive an intermediate frequency input signal, the output end of the intermediate frequency input channel is connected to the down-conversion regulation input end of the bidirectional microwave link, the down-conversion regulation output end of the bidirectional microwave link is connected to the input end of the radio frequency output channel, and the output end of the radio frequency output channel is used to transmit a radio frequency output signal; for the bidirectional microwave link, when the device is used to receive a radio frequency input signal, the up-conversion regulation link is enabled; when the device is used to transmit a radio frequency output signal, the down-conversion regulation link is enabled.

[0062] Compared with the prior art, the miniaturized multifunctional frequency conversion device provided in this embodiment includes a receiving channel and a transmitting channel. The receiving and transmitting channels share a bidirectional microwave link. The bidirectional microwave link can realize the bidirectional regulation of the microwave link through the bidirectional control of a set of links, reducing the volume, thus meeting the miniaturization requirements of the multifunctional frequency conversion device. At the same time, the design complexity and design cost of the hardware are reduced.

[0063] Preferably, the bidirectional microwave link is implemented in the following manner: The bidirectional microwave link includes a first single-pole double-throw switch (SPDT1), a 2-18G multiplex filter, a double-balanced mixer, a K-band bandpass filter, a bidirectional amplifier, and a second single-pole double-throw switch (SPDT2); wherein, the first moving terminal and the second moving terminal of the first single-pole double-throw switch are respectively used as the up-conversion control input terminal and the down-conversion control output terminal; the stationary terminal of the first single-pole double-throw switch is connected to one end of the 2-18G multiplex filter, the other end of the 2-18G multiplex filter is connected to the intermediate-frequency terminal IF of the double-balanced mixer, the radio-frequency terminal RF of the double-balanced mixer is connected to one end of the K-band bandpass filter, and the local-oscillator terminal LO of the double-balanced mixer receives the first wideband local-oscillator signal LO1_in; the other end of the K-band bandpass filter is connected to one end of the bidirectional amplifier, the other end of the bidirectional amplifier is connected to the stationary terminal of the second single-pole double-throw switch, and the first moving terminal and the second moving terminal of the second single-pole double-throw switch are respectively used as the up-conversion control output terminal and the down-conversion control input terminal. In the bidirectional microwave link provided in this embodiment, by selecting a double-balanced mixer and a bidirectional amplifier, when the up-conversion control link is enabled, the double-balanced mixer can be used to perform up-conversion on the signal output by the radio-frequency input channel, and the bidirectional amplifier can be used to amplify the signal after the up-conversion and filtering processes are completed. At the same time, when the down-conversion control link is enabled, the double-balanced mixer can be used to perform down-conversion on the signal output by the intermediate-frequency input channel, and the bidirectional amplifier can be used to amplify the signal after the down-conversion and filtering processes are completed. Thus, the up-conversion and down-conversion adaptation of the same bidirectional microwave link in different states (receiving / transmitting) can be achieved, and the amplification effect can be realized in both directions. Exemplarily, the 2-18G multiplex filter can be divided into 7 segments of filtering according to the signal frequency, and the overlapping bandwidth between the filtering ranges of each segment is 1 GHz.

[0064] Preferably, to control the regulation direction of the bidirectional microwave link, the device provided in this embodiment further includes a microwave link control module; the microwave link control module, when the device is used to receive a radio-frequency input signal, sends an up-conversion regulation instruction to the bidirectional microwave link; based on the received up-conversion regulation instruction, the bidirectional microwave link controls the connection between the first moving terminal and the stationary terminal of the first single-pole double-throw switch and the connection between the first moving terminal and the stationary terminal of the second single-pole double-throw switch to enable the up-conversion regulation link; the microwave link control module, when the device is used to transmit a radio-frequency output signal, also sends a down-conversion regulation instruction to the bidirectional microwave link; based on the received down-conversion regulation instruction, the bidirectional microwave link controls the connection between the second moving terminal and the stationary terminal of the first single-pole double-throw switch and the connection between the second moving terminal and the stationary terminal of the second single-pole double-throw switch to enable the down-conversion regulation link.

[0065] Preferably, the RF input channel includes a limiter, a digitally controlled attenuator, and a 2-18G linear amplifier. The input end of the limiter serves as the input end of the RF input channel. The output end of the limiter is connected to the input end of the digitally controlled attenuator. The output end of the digitally controlled attenuator is connected to the input end of the 2-18G linear amplifier. The output end of the 2-18G linear amplifier serves as the output end of the RF input channel. The RF frequency range of the RF input signal is 2-18 GHz.

[0066] Preferably, the intermediate frequency output channel includes a second mixer, a first S / C band band-pass filter, a coupler, a third mixer, and an L-band filter amplifier. The RF end RF of the second mixer serves as the input end of the intermediate frequency output channel. The intermediate frequency end IF of the second mixer is connected to the input end of the first S / C band band-pass filter. The output end of the first S / C band band-pass filter is connected to the input end of the coupler. The through end of the coupler is connected to the RF end RF of the third mixer. The intermediate frequency end IF of the third mixer is connected to the input end of the L-band filter amplifier. The output end of the L-band filter amplifier serves as the output end of the intermediate frequency output channel. The local oscillator end LO of the second mixer is used to receive the second fixed local oscillator signal LO2_in. The local oscillator end LO of the third mixer is used to receive the third fixed local oscillator signal LO3_in.

[0067] Preferably, the intermediate frequency output channel further includes a pulse detector. The coupled end of the coupler is connected to the input end of the pulse detector. The output end of the pulse detector is used to output a detection result. The pulse detector is used to detect whether a signal exists at the coupled end of the coupler. If it exists, the detection result output is that the device receives the RF input signal. Otherwise, the detection result output is that the device does not receive the RF input signal.

[0068] Preferably, the intermediate frequency input channel includes a fourth mixer, a second S / C band band-pass filter, an S / C band amplifier, and a fifth mixer. The intermediate frequency end IF of the fourth mixer serves as the input end of the intermediate frequency input channel. The RF end RF of the fourth mixer is connected to the input end of the second S / C band band-pass filter. The output end of the second S / C band band-pass filter is connected to the input end of the S / C band amplifier. The output end of the S / C band amplifier is connected to the intermediate frequency end IF of the fifth mixer. The RF end RF of the fifth mixer serves as the output end of the intermediate frequency input channel. The local oscillator end LO of the fifth mixer is used to receive the second fixed local oscillator signal. The local oscillator end LO of the fourth mixer is used to receive the third fixed local oscillator signal.

[0069] The RF output channel includes a 2-18G saturation amplifier and an electronically tunable attenuator. Among them, the input end of the 2-18G saturation amplifier serves as the input end of the RF output channel, the output end of the 2-18G saturation amplifier is connected to the input end of the electronically tunable attenuator, and the output end of the electronically tunable attenuator serves as the output end of the RF output channel.

[0070] In addition, considering that the second fixed local oscillator signal and the third fixed local oscillator signal are both used in the intermediate frequency input channel and the intermediate frequency output channel, therefore, in this embodiment, the channels enabling the second fixed local oscillator signal and the third fixed local oscillator signal can also be determined in the following manner. Specifically, the device further includes a third single-pole double-throw switch (SPDT3) and a fourth single-pole double-throw switch (SPDT4). Among them, the stationary terminal of the third single-pole double-throw switch receives the second fixed local oscillator signal, the first moving terminal of the third single-pole double-throw switch is connected to the local oscillator terminal LO of the second mixer, and the second moving terminal of the third single-pole double-throw switch is connected to the local oscillator terminal LO of the fifth mixer; the stationary terminal of the fourth single-pole double-throw switch receives the third fixed local oscillator signal, the first moving terminal of the fourth single-pole double-throw switch is connected to the local oscillator terminal LO of the third mixer, and the second moving terminal of the fourth single-pole double-throw switch is connected to the local oscillator terminal LO of the fourth mixer; when the device is used to receive an RF input signal, the stationary terminal and the first moving terminal of the third single-pole double-throw switch are connected, and the stationary terminal and the first moving terminal of the fourth single-pole double-throw switch are connected; when the device is used to transmit an RF output signal, the stationary terminal and the second moving terminal of the third single-pole double-throw switch are connected, and the stationary terminal and the second moving terminal of the fourth single-pole double-throw switch are connected.

[0071] Furthermore, the third single-pole double-throw switch and the fourth single-pole double-throw switch are controlled by the microwave link control module. When the device is used to receive an RF input signal, the microwave link issues a first switch action control instruction to control the connection between the stationary terminal and the first moving terminal of the third single-pole double-throw switch, and also controls the connection between the stationary terminal and the first moving terminal of the fourth single-pole double-throw switch; when the device is used to transmit an RF output signal, the microwave link issues a second switch action control instruction to control the connection between the stationary terminal and the second moving terminal of the third single-pole double-throw switch, and also controls the connection between the stationary terminal and the second moving terminal of the fourth single-pole double-throw switch.

[0072] In the specific implementation process, the microwave link control module controls the above device to receive an RF input signal or to transmit an RF output signal in time segments.

[0073] Based on the above description, it can be seen that the miniaturized multi-functional frequency conversion device provided in this embodiment can achieve a transceiver function with a frequency coverage of 2 GHz to 18 GHz, and realize an integrated broadband transceiver in the S / C / X / Ku bands. Next, taking Figure 3 as an example, the flow principle of the transceiver signals of the miniaturized multi-functional frequency conversion device is described as follows:

[0074] The implementation principle of the receiving function is described as follows: When the device is used to receive radio frequency input signals, the two-way microwave link enables the up-conversion control link, and the second mixer and the third mixer respectively receive the second fixed local oscillator signal and the third fixed local oscillator signal. At this time, after the radio frequency input signal in the 2 GHz - 18 GHz wide frequency band enters the radio frequency input channel, it successively passes through a limiter, a digital control attenuator, and a 2 - 18G linear amplifier. Small signals are amplified step by step, and large signals are saturated and limited step by step. Thus, the limiter, attenuation, and amplification of the radio frequency input signal are realized by using the radio frequency input channel. The output signal of the radio frequency input channel is input to the two-way microwave link that enables the up-conversion control link, and the harmonics are filtered by a 2 - 18G multiplex filter. It is mixed and up-converted with the first broadband local oscillator signal LO1_in (frequency variable) through a double-balanced mixer to generate a K-band signal; the spurious signals are filtered by a K-band band-pass filter, and then amplified by a two-way amplifier to obtain the up-conversion output signal of the two-way microwave link. The up-conversion output signal of the two-way microwave link is input to the intermediate frequency output channel, and is mixed with the second fixed local oscillator signal LO2_in (fixed point frequency) through the second mixer to generate an S / C-band intermediate frequency signal; after filtering and input to a coupler, one path is output for synchronous detection, and the other S / C-band intermediate frequency signal is down-converted with the third fixed local oscillator signal LO3_in (fixed point frequency) to generate an intermediate frequency signal in the range of 0.3 GHz - 2.3 GHz. After filtering and amplification by an L-band filter amplifier, the output end of the intermediate frequency output channel is used to output the intermediate frequency output signal.

[0075] The implementation principle of the transmitting function is described as follows: When the device is used to transmit radio frequency output signals, the two-way microwave link enables the down-conversion control link, and the fourth mixer and the fifth mixer respectively receive the third fixed local oscillator signal and the second fixed local oscillator signal. At this time, after the intermediate frequency input signal (interference intermediate frequency signal) in the range of 0.3 GHz - 2.3 GHz enters the intermediate frequency input channel, the fourth mixer is used to up-convert with the third fixed local oscillator signal to generate an S / C-band intermediate frequency signal. After filtering, saturation, and amplification by an S / C-band band-pass filter and an S / C-band amplifier, the fifth mixer is used to up-convert with the second fixed local oscillator signal to generate a K-band signal. The K-band signal is input to the two-way microwave link that enables the down-conversion control link, amplified by a two-way amplifier, filtered by a K-band band-pass filter, and then down-converted with the first broadband local oscillator signal by a double-balanced mixer to generate a radio frequency signal in the 2 GHz - 18 GHz wide frequency band; this radio frequency signal is filtered by a 2 - 18G multiplex filter to obtain the down-conversion output signal of the two-way microwave link. The down-conversion output signal is amplified and electrically tuned and attenuated by a 2 - 18G saturation amplifier and an electrically tuned attenuator in the radio frequency output channel to obtain the radio frequency output signal.

[0076] It should be emphasized that in the RF input channel of this embodiment, a digital controlled attenuator is adopted to improve the flexibility of signal gain control in the receiving channel, avoiding excessive saturation compression after high-power signals enter the RF input channel, which may affect the receiving performance of the device, and adjusting the receiving gain to ensure the receiving dynamic range of the component. Exemplarily, a three-state NC1325C-118PD digital controlled attenuator controlled by 2 bits can be used, which can achieve an attenuation step of 0 dB to 30 dB and a 10 dB step function, achieving the predetermined design indicators and effects. In the RF output channel, an electronically tunable attenuator (such as a combination of PIN attenuator + digital controlled attenuator) is selected to realize the power adjustment of the output signal, ensuring that the RF output signal output from the RF output channel of the device can be amplitude-conditioned, so that the RF output signal reaches the required RF amplitude. Exemplarily, the implementation scheme for power control in the transmitting channel is as follows: two devices from the 13th Research Institute of CETC, namely PIN attenuator BW870 and digital controlled attenuator BW150D, are used, which can achieve a power adjustable range of ≥40 dB in the full frequency band of 2 GHz to 18 GHz, ensuring the achievement of the transmitting power index requirements of the device.

[0077] At the same time, considering that the large instantaneous bandwidth technology in this embodiment mainly involves frequency conversion of 2 GHz to 18 GHz RF signals and 0.3 GHz to 2.3 GHz intermediate frequency signals, the working bandwidth and overlapping bandwidth of each stage of the filter are both greater than 2 GHz. At the same time, by reasonably allocating the relevant indicators of circuit gain, attenuation, and filtering, it is possible to ensure that other predetermined technical indicators are achieved within the 2 GHz instantaneous bandwidth of the component.

[0078] To control the spectrum quality, the device uses a three-stage frequency conversion method for mixing. The component spectrum quality control scheme is combined with the saturation limiting design. In addition to using a mixer (MM1-1850H) with excellent self-indicators, through reasonable channel gain attenuation design, it is ensured that the mixing input signal is not greater than -5 dBm, ensuring the full play of the excellent performance of the mixer. At the same time, on-chip filter banks (BWSBF-R8 / 18-7A), MEMS filters and other miniaturized filters are used to reduce the component structure size on the premise of meeting the filtering performance, thereby realizing the signal spectrum quality within the 2 GHz instantaneous bandwidth. The intermediate frequency mixing schematic diagram and the RF mixing schematic diagram are respectively as Figure 4 、 Figure 5 shown.

[0079] To ensure the receiving dynamic effect of the device, the receiving dynamic design scheme of the device needs to be combined with the spectrum quality control scheme. First, the 25dB receiving dynamic is optimized by using a broadband amplifier + fixed attenuator to saturate step by step on the 2GHz - 18GHz input signal channel. Then, the harmonic signals generated by the amplifier saturation are filtered through the upper filter bank (BWSBF-R8 / 18-7A) to ensure the signal spectrum quality and power amplitude before input to the mixer. On this basis, the 25dB receiving dynamic is further optimized by using the same amplifier + fixed attenuator to saturate step by step on the C-band intermediate frequency signal channel, so that the received intermediate frequency signal can be ensured to be within a small power range when input in the entire dynamic range, and it is within the normal working window of DRFM, thereby achieving the receiving dynamic range within the 2GHz instantaneous bandwidth.

[0080] In the specific implementation process, according to the actual application requirements, the miniaturized multifunctional frequency conversion device provided in this implementation can achieve the following technical indicators:

[0081] (1) Radio frequency: (2 - 18)GHz;

[0082] (2) Intermediate frequency: 0.3 - 2.3GHz

[0083] (2) Receiving sensitivity: ≤ -60dBm;

[0084] (3) Receiving power dynamic: ≥ 50dB;

[0085] (4) Output power range: +10dBm - -10dBm;

[0086] (5) Instantaneous bandwidth: 2GHz;

[0087] In the actual application process, the volume of the miniaturized multifunctional frequency conversion device can be controlled within 148mm × 100mm × 15mm. That is, within the volume of 148mm × 100mm × 15mm, the reception and transmission of S / C / X / Ku band signals are realized, the intermediate frequency bandwidth reaches 2GHz, which well solves the problems of wide frequency band, high-sensitivity reception, large dynamic range reception, large instantaneous bandwidth and miniaturized integration, realizes the up and down conversion of wide-band signals, and at the same time has functions such as gain control. The device principle adopts a design scheme with three-time frequency conversion for both reception and transmission, shares the microwave link for reception and transmission, and has the ability of multi-channel filtering.

[0088] In the actual assembly process of the miniaturized multifunctional frequency conversion device provided in this embodiment, the front of the device structure is micro-assembled, the back is the power supply board, and the two sides are bonded through glass insulators or gold wires. The control and power supply ports of the MDM1-37 micro-rectangular socket can be utilized. The front of the device structure contains single-function microwave bare chips and multifunctional chips.

[0089] The above method embodiments and device embodiments are based on the same principle, and their relevant parts can be learned from each other and can achieve the same technical effects.

[0090] Those skilled in the art can understand that all or part of the processes of implementing the above method embodiments can be completed by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. Among them, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory, a random access memory, etc.

[0091] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A multi-band radio frequency signal transceiver method, characterized in that, including a multi-band radio frequency signal receiving method and a multi-band radio frequency signal transmitting method; wherein, the multi-band radio frequency signal receiving method performs: receiving a radio frequency input signal, the radio frequency input signal is up-converted to the K band through the first-stage mixing, then down-converted to the S / C band through the second-stage mixing, and then down-converted to the L-band intermediate frequency through the third-stage mixing to generate a first L-band intermediate frequency output signal; the multi-band radio frequency signal transmitting method performs: obtaining a second L-band intermediate frequency output signal, the second L-band intermediate frequency output signal is up-converted to the S / C band through the fourth-stage mixing, then up-converted to the K band through the fifth-stage mixing, and then down-converted to the S / C / X / Ku band through the sixth-stage mixing to generate a radio frequency output signal; The first-stage mixing up-conversion and the sixth-stage mixing down-conversion are realized by the same bidirectional microwave link working in the up-conversion regulation state and the down-conversion regulation state respectively.

2. The multi-band radio frequency signal transceiver method according to claim 1, characterized in that, During the execution of the multi-band radio frequency signal receiving method, the bidirectional microwave link sequentially performs: The signal after gain adjustment of the radio frequency input signal sequentially performs 2-18G multi-channel filtering, first-stage mixing up-conversion, K-band band-pass filtering, and amplification to obtain a first K-band signal.

3. The multi-band radio frequency signal transceiver method according to claim 2, characterized in that, During the execution of the multi-band radio frequency signal transmitting method, the bidirectional microwave link sequentially performs: The second K-band signal up-converted to the K band through the fifth-stage mixing is sequentially amplified, K-band band-pass filtered, sixth-stage mixed down-converted, and 2-18G multi-channel filtered to obtain a radio frequency output signal to be adjusted.

4. The multi-band radio frequency signal transceiver method according to claim 3, wherein The bidirectional microwave link includes a first single-pole double-throw switch, a 2-18G multi-channel filter, a double-balanced mixer, a K-band band-pass filter, a bidirectional amplifier, and a second single-pole double-throw switch; wherein, The first moving terminal and the second moving terminal of the first single-pole double-throw switch are respectively used as the up-conversion regulation input terminal and the down-conversion regulation output terminal; wherein, the up-conversion regulation input terminal is used to receive the signal after gain adjustment, and the down-conversion regulation output terminal is used to output the radio frequency output signal to be adjusted; The fixed terminal of the first single-pole double-throw switch is connected to one end of the 2-18G multi-channel filter, the other end of the 2-18G multi-channel filter is connected to the intermediate frequency terminal IF of the double-balanced mixer, the radio frequency terminal RF of the double-balanced mixer is connected to one end of the K-band band-pass filter, and the local oscillator terminal LO of the double-balanced mixer receives the first broadband local oscillator signal; The other end of the K-band band-pass filter is connected to one end of the bidirectional amplifier, the other end of the bidirectional amplifier is connected to the fixed terminal of the second single-pole double-throw switch, and the first moving terminal and the second moving terminal of the second single-pole double-throw switch are respectively used as the up-conversion regulation output terminal and the down-conversion regulation input terminal; wherein, the up-conversion regulation output terminal is used to output the first K-band signal, and the down-conversion regulation input terminal is used to receive the second K-band signal.

5. The multi-band radio frequency signal transceiver method according to claim 4, wherein When the first moving terminal and the fixed terminal of the first single-pole double-throw switch are connected, and the first moving terminal and the fixed terminal of the second single-pole double-throw switch are connected, the bidirectional microwave link works in the up-conversion regulation state, and the double-balanced mixer performs the first-stage mixing up-conversion; When the second moving end and the fixed end of the first single-pole double-throw switch are connected, and the second moving end and the fixed end of the second single-pole double-throw switch are connected, the bidirectional microwave link operates in the down-conversion regulation state, and the double-balanced mixer performs the sixth-stage mixing down-conversion.

6. The multi-band radio frequency signal transceiver method according to claim 5, characterized in that During the process of executing the multi-band radio frequency signal receiving method, the gain-adjusted signal is obtained by performing the following operations: The received radio frequency input signal is successively subjected to limiting, digital control attenuation, and 2-18G linear amplification to obtain the gain-adjusted signal.

7. The multi-band radio frequency signal transceiver method according to claim 6, wherein During the process of executing the multi-band radio frequency signal receiving method, the following operations are performed on the first K-band signal to generate the first L-band intermediate frequency output signal: The first K-band signal is subjected to the second-stage mixing down-conversion to obtain the first S / C-band signal. The first S / C-band signal is successively subjected to S / C-band band-pass filtering, the third-stage mixing down-conversion, and L-band filtering amplification to generate the first L-band intermediate frequency output signal.

8. The multi-band radio frequency signal transceiver method according to claim 7, characterized in that During the process of executing the multi-band radio frequency signal receiving method, it further includes: The signal after the third-stage mixing down-conversion is input for coupling, and the signal output from the coupling end of the coupler is subjected to pulse detection to determine whether the radio frequency input signal is received.

9. The multi-band radio frequency signal transceiver method according to claim 8, wherein During the process of the multi-band radio frequency signal transmitting method, the following operations are performed on the second L-band intermediate frequency output signal to obtain the second K-band signal: The second L-band intermediate frequency output signal is successively subjected to the fourth-stage mixing up-conversion, S / C-band band-pass filtering, S / C-band amplification, and the fifth-stage mixing up-conversion to obtain the second K-band signal.

10. The multi-band radio frequency signal transceiver method according to claim 9, characterized in that, During the process of the multi-band radio frequency signal transmitting method, the following operations are performed on the radio frequency output signal to be adjusted to generate the radio frequency output signal: The radio frequency output signal to be adjusted is successively subjected to 2-18G saturation amplification and electrical tuning attenuation to generate the radio frequency output signal.

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