Miniaturized multifunctional frequency conversion device

Abstract

The invention relates to a miniaturized multifunctional frequency conversion device, relates to the technical field of microwave integrated circuits, and solves the problems of high design complexity of radio frequency transceiving hardware and the like. According to the device, the input end of a radio frequency input channel receives a radio frequency input signal, the output end of the radio frequency input channel is connected with the up-conversion regulation and control input end of a bidirectional microwave link, the up-conversion regulation and control output end of the bidirectional microwave link is connected with the input end of an intermediate frequency output channel, and the output end of the intermediate frequency output channel outputs an intermediate frequency output signal; the input end of the intermediate frequency input channel receives an intermediate frequency input signal, the output end of the intermediate frequency input channel is connected with the down-conversion regulation and control input end of the bidirectional microwave link, the down-conversion regulation and control output end of the bidirectional microwave link is connected with the input end of the radio frequency output channel, and the output end of the radio frequency output channel transmits a radio frequency output signal; and a bidirectional microwave link which enables the up-conversion regulation and control link and the down-conversion regulation and control link respectively when the device is used for receiving the radio frequency input signal and transmitting the radio frequency output signal respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave integrated circuits, and particularly to a miniaturized multi-functional frequency conversion device. 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 radar, communication, electronic warfare and other advanced weaponry urgently demands 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 full-life cycle cost, support for multi-functions and gradually possess the characteristics of intelligence, etc. 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. Electronic countermeasure has become the "soul" dominating the battlefield and the core content of modern wars, playing a decisive role in wars. 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. 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 currently common frequency conversion devices, the receiving channel and the transmitting channel are independent of each other, the design complexity and cost of radio frequency transceiver hardware are relatively high, and it is difficult to achieve multi-band integrated broadband transceiver design including S / C / X / Ku bands. Therefore, how to design a miniaturized frequency conversion device covering multiple bands has become a technical problem that needs to be solved urgently at present. Summary of the Invention

[0004] In view of the above analysis, the embodiments of the present invention aim to provide a miniaturized multi-functional frequency conversion device to solve the problems of relatively high design complexity and cost of existing radio frequency transceiver hardware and difficulty in achieving multi-band integrated broadband transceiver design.

[0005] The present invention discloses a miniaturized multi-functional frequency conversion device, including: 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,

[0006] 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. The output end of the intermediate frequency output channel is used to output an intermediate frequency output signal;

[0007] 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 control input end of the bidirectional microwave link. The down-conversion control output end of the bidirectional microwave link is connected to the input end of the radio-frequency output channel. The output end of the radio-frequency output channel is used to transmit a radio-frequency output signal.

[0008] For the bidirectional microwave link, when the device is used to receive a radio-frequency input signal, the up-conversion control link is enabled; when the device is used to transmit a radio-frequency output signal, the down-conversion control link is enabled.

[0009] Based on the above solution, the present invention has also made the following improvements:

[0010] 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,

[0011] The first moving end and the second moving end of the first single-pole double-throw switch are respectively used as the up-conversion control input end and the down-conversion control output end; the stationary end 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 end IF of the double-balanced mixer, the radio-frequency end RF of the double-balanced mixer is connected to one end of the K-band band-pass filter, and the local oscillator end LO of the double-balanced mixer receives a first broadband local oscillator signal;

[0012] 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 end of the second single-pole double-throw switch, and the first moving end and the second moving end of the second single-pole double-throw switch are respectively used as the up-conversion control output end and the down-conversion control input end.

[0013] Further, the device further includes a microwave link control module;

[0014] When the device is used to receive a radio-frequency input signal, the microwave link control module sends an up-conversion control instruction to the bidirectional microwave link; based on the received up-conversion control instruction, the bidirectional microwave link controls the connection between the first moving end and the stationary end of the first single-pole double-throw switch and the connection between the first moving end and the stationary end of the second single-pole double-throw switch to enable the up-conversion control link;

[0015] When the device is used to transmit a radio-frequency output signal, the microwave link control module also sends a down-conversion control instruction to the bidirectional microwave link; based on the received down-conversion control instruction, the bidirectional microwave link controls the connection between the second moving end and the stationary end of the first single-pole double-throw switch and the connection between the second moving end and the stationary end of the second single-pole double-throw switch to enable the down-conversion control link.

[0016] Further, the RF input channel includes a limiter, a digital controlled attenuator, and a 2-18G linear amplifier; wherein,

[0017] 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 digital controlled attenuator. The output end of the digital 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;

[0018] The RF frequency range of the RF input signal is 2-18 GHz.

[0019] Further, the intermediate frequency output channel includes a second mixer, a first S / C band pass filter, a coupler, a third mixer, and an L band filter amplifier; wherein,

[0020] 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 pass filter. The output end of the first S / C 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;

[0021] The local oscillator end LO of the second mixer is used to receive a second fixed local oscillator signal; the local oscillator end LO of the third mixer is used to receive a third fixed local oscillator signal.

[0022] Further, the intermediate frequency output channel further includes a pulse detector;

[0023] 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;

[0024] The pulse detector is used to detect whether a signal exists at the coupled end of the coupler. If it exists, the output detection result is that the device receives an RF input signal; otherwise, the output detection result is that the device does not receive an RF input signal.

[0025] Further, the intermediate frequency input channel includes a fourth mixer, a second S / C band pass filter, an S / C band amplifier, and a fifth mixer; wherein,

[0026] 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 pass filter. The output end of the second S / C 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;

[0027] The local oscillator terminal LO of the fifth mixer is used to receive the second fixed local oscillator signal; the local oscillator terminal LO of the fourth mixer is used to receive the third fixed local oscillator signal.

[0028] Furthermore, the RF output channel includes a 2-18G saturated amplifier and an electrically tunable attenuator; wherein,

[0029] The input end of the 2-18G saturated amplifier serves as the input end of the RF output channel, the output end of the 2-18G saturated amplifier is connected to the input end of the electrically tunable attenuator, and the output end of the electrically tunable attenuator serves as the output end of the RF output channel.

[0030] Furthermore, the device further includes a third single-pole double-throw switch and a fourth single-pole double-throw switch; wherein,

[0031] 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;

[0032] 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;

[0033] 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;

[0034] 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.

[0035] Furthermore, the third single-pole double-throw switch and the fourth single-pole double-throw switch are controlled by the microwave link control module;

[0036] When the device is used to receive an RF input signal, the microwave link issues a switch first 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;

[0037] When the device is used to transmit an RF output signal, the microwave link issues a switch second 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.

[0038] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0039] The miniaturized multifunctional frequency conversion device provided by the present invention includes a receiving channel and a transmitting channel. The receiving and transmitting channels share a bidirectional microwave link. The bidirectional regulation of the microwave link can be achieved 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 cost of the hardware are reduced, effectively solving the problem of multi-band integrated broadband transceiver design.

[0040] At the same time, through the specific settings of the RF input channel, IF output channel, IF input channel, RF output channel and bidirectional microwave link, the device can meet multiple technical indicators such as receiving sensitivity, receiving power dynamic range, output power range and instantaneous bandwidth. By reducing the components and the reasonable distribution of the components, the assembled structure has a small volume and can meet the miniaturization requirements.

[0041] 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 specification, and some advantages will be obvious from the specification 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 specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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;

[0043] Figure 1 It is a schematic structural diagram of the miniaturized multifunctional frequency conversion device provided by an embodiment of the present invention;

[0044] Figure 2 It is a specific circuit diagram of the miniaturized multifunctional frequency conversion device provided by an embodiment of the present invention;

[0045] Figure 3 It is a schematic diagram of intermediate frequency mixing principle provided by an embodiment of the present invention;

[0046] Figure 4 It is a schematic diagram of radio frequency mixing principle provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The following will specifically describe the preferred embodiments of the present invention with reference to the drawings. The 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, not to limit the scope of the present invention.

[0048] A specific embodiment of the present invention discloses a miniaturized multifunctional frequency conversion device, and the schematic structural diagram is asFigure 1 As shown, the specific circuit diagram is as Figure 2 shown. 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 said 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.

[0049] Compared with the prior art, the miniaturized multi-functional 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 regulation of the microwave link can be achieved through the bidirectional control of a set of links, reducing the volume, thereby meeting the miniaturization requirements of the multi-functional frequency conversion device. At the same time, the design complexity and design cost of the hardware are reduced.

[0050] 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 from 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 from 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.

[0051] Preferably, to control the regulation direction of the bidirectional microwave link, the device provided in this embodiment further includes a microwave link control module; when the device is used to receive a radio-frequency input signal, the microwave link control module 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; when the device is used to transmit a radio-frequency output signal, the microwave link control module 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.

[0052] Preferably, the RF input channel includes a limiter, a digitally controlled attenuator, and a 2-18G linear amplifier. Among them, 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.

[0053] Preferably, the intermediate frequency output channel includes a second mixer, a first S / C band pass filter, a coupler, a third mixer, and an L band filter amplifier. Among them, 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 pass filter. The output end of the first S / C 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.

[0054] 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 the detection result. The pulse detector is used to detect whether there is a signal output from the coupled end of the coupler. If there is, the output detection result is that the device receives the RF input signal. Otherwise, the output detection result is that the device does not receive the RF input signal.

[0055] Preferably, the intermediate frequency input channel includes a fourth mixer, a second S / C band pass filter, an S / C band amplifier, and a fifth mixer. Among them, the RF end RF and the intermediate frequency end IF of the fourth mixer serve as the input end of the intermediate frequency input channel. 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 pass filter. The output end of the second S / C 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.

[0056] The RF output channel includes a 2-18G saturation amplifier and an electronically tunable attenuator; wherein, 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.

[0057] In addition, considering that both the intermediate-frequency input channel and the intermediate-frequency output channel use the second fixed local oscillator signal and the third fixed local oscillator signal, 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); wherein, the stationary end of the third single-pole double-throw switch receives the second fixed local oscillator signal, the first moving end of the third single-pole double-throw switch is connected to the local oscillator terminal LO of the second mixer, and the second moving end of the third single-pole double-throw switch is connected to the local oscillator terminal LO of the fifth mixer; the stationary end of the fourth single-pole double-throw switch receives the third fixed local oscillator signal, the first moving end of the fourth single-pole double-throw switch is connected to the local oscillator terminal LO of the third mixer, and the second moving end 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 end and the first moving end of the third single-pole double-throw switch are connected, and the stationary end and the first moving end of the fourth single-pole double-throw switch are connected; when the device is used to transmit an RF output signal, the stationary end and the second moving end of the third single-pole double-throw switch are connected, and the stationary end and the second moving end of the fourth single-pole double-throw switch are connected.

[0058] 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 switch first action control instruction to control the connection between the stationary end and the first moving end of the third single-pole double-throw switch, and also controls the connection between the stationary end and the first moving end of the fourth single-pole double-throw switch; when the device is used to transmit an RF output signal, the microwave link issues a switch second action control instruction to control the connection between the stationary end and the second moving end of the third single-pole double-throw switch, and also controls the connection between the stationary end and the second moving end of the fourth single-pole double-throw switch.

[0059] 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-sharing manner.

[0060] Based on the above description, it can be seen that the miniaturized multi-functional frequency conversion device provided in this embodiment can realize the transceiver function with a frequency coverage of 2 GHz to 18 GHz, and realize the integrated broadband transceiver in the S / C / X / Ku bands. Next, taking Figure 2 as an example, the signal transceiver process principle of the miniaturized multi-functional frequency conversion device is described as follows:

[0061] 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 receive the second fixed local oscillator signal and the third fixed local oscillator signal respectively. At this time, after the radio frequency input signal in the 2 GHz - 18 GHz broadband 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 out 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; after the spurious signals are filtered out by a K-band band-pass filter and then amplified by a two-way amplifier, the up-conversion output signal of the two-way microwave link is obtained. The up-conversion output signal of the two-way microwave link is input to the intermediate frequency output channel, and it 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 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.

[0062] 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 receive the third fixed local oscillator signal and the second fixed local oscillator signal respectively. 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 it 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 it 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, and after signal amplification by a two-way amplifier and filtering by a K-band band-pass filter, it is down-converted with the first broadband local oscillator signal through a double-balanced mixer to generate a radio frequency signal in the 2 GHz - 18 GHz broadband; 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. This down-conversion output signal is amplified and electrically tuned for attenuation through a 2 - 18G saturation amplifier and an electrically tuned attenuator in the radio frequency output channel to obtain the radio frequency output signal.

[0063] 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, avoid excessive saturation compression after high-power signals enter the RF input channel, which may affect the receiving performance of the device, and adjust 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 with 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 achieve 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 the PIN attenuator BW870 and the digital controlled attenuator BW150D, are used, which can achieve a power adjustable range of ≥40 dB within the full frequency band of 2 GHz to 18 GHz, ensuring that the transmitting power index requirements of the device are met.

[0064] At the same time, considering that the large instantaneous bandwidth technology in this embodiment mainly involves frequency conversion of RF signals from 2 GHz to 18 GHz and IF signals from 0.3 GHz to 2.3 GHz, 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.

[0065] 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, so as to give full play to the excellent performance of the mixer. At the same time, miniaturized filters such as an on-chip filter bank (BWSBF-R8 / 18-7A) and MEMS filters are used to reduce the structural size of the component while meeting the filtering performance, thereby achieving the signal spectrum quality within the 2 GHz instantaneous bandwidth. The schematic diagrams of intermediate frequency mixing and RF mixing are respectively as Figure 3 , Figure 4 shown.

[0066] 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 gradually saturate 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 input before mixing. On this basis, the 25dB receiving dynamic is further optimized by using the same amplifier + fixed attenuator to gradually saturate 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 realizing the receiving dynamic range within the 2GHz instantaneous bandwidth.

[0067] 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:

[0068] (1) Radio frequency: (2 - 18)GHz;

[0069] (2) Intermediate frequency: 0.3 - 2.3GHz

[0070] (2) Receiving sensitivity: ≤ -60dBm;

[0071] (3) Receiving power dynamic: ≥ 50dB;

[0072] (4) Output power range: +10dBm - -10dBm;

[0073] (5) Instantaneous bandwidth: 2GHz;

[0074] 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 wideband, high-sensitivity reception, large dynamic range reception, large instantaneous bandwidth and miniaturized integration, realizes the up and down conversion of wideband signals, and at the same time has functions such as gain control. The device principle adopts a design scheme of three-stage frequency conversion for both reception and transmission, shares the microwave link for transceiver, and has the ability of multi-channel filtering.

[0075] 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.

[0076] Those skilled in the art can understand that all or part of the processes of implementing the methods of the above 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 disk, an optical disc, a read-only memory or a random access memory, etc.

[0077] As mentioned above, the above are only the preferred specific embodiments 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 within the protection scope of the present invention.

Claims

1. A miniaturized multi-functional frequency conversion device, characterized in that, Including: 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. 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. The output end of the radio frequency output channel is used to transmit a radio frequency output signal; For the said 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.

2. The miniaturized multi-functional frequency conversion device according to claim 1, wherein The said bidirectional microwave link includes a first single-pole double-throw switch, a 2-18G multiplex 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 end and the second moving end of the first single-pole double-throw switch are respectively used as the up-conversion regulation input end and the down-conversion regulation output end; the stationary end 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 band-pass filter. The local oscillator terminal LO of the double-balanced mixer receives a first wide-band 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 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 respectively used as the up-conversion regulation output end and the down-conversion regulation input end.

3. The miniaturized multi-functional frequency conversion device according to claim 2, characterized in that The said device further includes a microwave link control module; For the said microwave link control module, when the device is used to receive a radio frequency input signal, an up-conversion regulation instruction is sent to the said bidirectional microwave link; based on the received up-conversion regulation instruction, the bidirectional microwave link controls the connection between the first moving end and the stationary end of the first single-pole double-throw switch, and the connection between the first moving end and the stationary end of the second single-pole double-throw switch, so as to enable the up-conversion regulation link; For the said microwave link control module, when the device is used to transmit a radio frequency output signal, a down-conversion regulation instruction is also sent to the said bidirectional microwave link; based on the received down-conversion regulation instruction, the bidirectional microwave link controls the connection between the second moving end and the stationary end of the first single-pole double-throw switch, and the connection between the second moving end and the stationary end of the second single-pole double-throw switch, so as to enable the down-conversion regulation link.

4. The miniaturized multi-functional frequency conversion device according to claim 3, characterized in that, The said radio frequency input channel includes a limiter, a digital controlled attenuator, and a 2-18G linear amplifier; wherein, The input end of the limiter is used as the input end of the radio frequency input channel. The output end of the limiter is connected to the input end of the digital controlled attenuator. The output end of the digital controlled attenuator is connected to the input end of the 2-18G linear amplifier. The output end of the 2-18G linear amplifier is used as the output end of the radio frequency input channel; The RF frequency range of the RF input signal is 2 - 18 GHz.

5. The miniaturized multi-functional frequency conversion device according to claim 4, characterized in that, 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; wherein, The RF terminal RF of the second mixer serves as the input terminal of the intermediate frequency output channel. The intermediate frequency terminal IF of the second mixer is connected to the input terminal of the first S / C band band-pass filter. The output terminal of the first S / C band band-pass filter is connected to the input terminal of the coupler. The through terminal of the coupler is connected to the RF terminal RF of the third mixer. The intermediate frequency terminal IF of the third mixer is connected to the input terminal of the L-band filter amplifier. The output terminal of the L-band filter amplifier serves as the output terminal of the intermediate frequency output channel; The local oscillator terminal LO of the second mixer is used to receive the second fixed local oscillator signal; the local oscillator terminal LO of the third mixer is used to receive the third fixed local oscillator signal.

6. The miniaturized multi-functional frequency conversion device according to claim 5, characterized in that, The intermediate frequency output channel further includes a pulse detector; The coupled terminal of the coupler is connected to the input terminal of the pulse detector, and the output terminal of the pulse detector is used to output the detection result; The pulse detector is used to detect whether the signal output from the coupled terminal of the coupler exists. If it exists, the output detection result is that the device receives the RF input signal; Otherwise, the output detection result is that the device does not receive the RF input signal.

7. The miniaturized multi-functional frequency conversion device according to claim 6, characterized in that, 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; wherein, The intermediate frequency terminal IF of the fourth mixer serves as the input terminal of the intermediate frequency input channel. The RF terminal RF of the fourth mixer is connected to the input terminal of the second S / C band band-pass filter. The output terminal of the second S / C band band-pass filter is connected to the input terminal of the S / C band amplifier. The output terminal of the S / C band amplifier is connected to the intermediate frequency terminal IF of the fifth mixer. The RF terminal RF of the fifth mixer serves as the output terminal of the intermediate frequency input channel; The local oscillator terminal LO of the fifth mixer is used to receive the second fixed local oscillator signal; the local oscillator terminal LO of the fourth mixer is used to receive the third fixed local oscillator signal.

8. The miniaturized multi-functional frequency conversion device according to claim 7, wherein, The RF output channel includes a 2 - 18G saturation amplifier and an electrically tunable attenuator; wherein, The input terminal of the 2 - 18G saturation amplifier serves as the input terminal of the RF output channel. The output terminal of the 2 - 18G saturation amplifier is connected to the input terminal of the electrically tunable attenuator. The output terminal of the electrically tunable attenuator serves as the output terminal of the RF output channel.

9. The miniaturized multi-functional frequency conversion device according to claim 8, wherein The device further includes a third single-pole double-throw switch and a fourth single-pole double-throw switch; wherein, 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. 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. 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 the 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 a radio frequency 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.

10. The miniaturized multi-functional frequency conversion device according to claim 9, wherein, 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 a radio frequency 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 a radio frequency 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.

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