A broadband multi-functional reconfigurable frequency converter and a method for implementing reconfigurable frequency conversion.

Abstract

This invention relates to a broadband multi-functional reconfigurable frequency converter and a method for implementing reconfigurable frequency conversion, comprising a radio frequency transceiver matrix, a high rejection ratio (HRRR) switching filter bank, and a frequency conversion link. This frequency converter integrates transceiver functionality. In the receiving channel, the radio frequency transceiver matrix combines four input radio frequency (RF) signals and outputs two RF signals, which are then pre-filtered by the HRRR switching filter bank. Finally, the RF signals are mixed with the local oscillator signal via the frequency conversion link to output two intermediate frequency (IF) signals. In the transmitting channel, the RF signals are amplified by the drive circuit in the frequency conversion link before being output. This frequency converter outputs two bandwidth IF signals, which can be applied to electronic reconnaissance and radar operating scenarios respectively, and phase correction methods are used to reduce inter-channel phase errors.

Description

Technical Field

[0001] This invention pertains to frequency conversion components for multi-functional interference devices, and relates to a broadband multi-functional reconfigurable frequency conversion component and a method for implementing reconfigurable frequency conversion. Background Technology

[0002] Radio frequency (RF) microwave transceiver systems are widely used in electronic systems such as radar, electronic countermeasures, and wireless mobile communications. Almost every microwave transceiver system involves frequency changes, making the frequency conversion module a crucial component. This module converts the received signal to a baseband signal for post-processing, or converts the baseband signal for transmission. Key technical specifications describing the performance of such products include: 1) operating frequency bandwidth; 2) output signal flatness; 3) dynamic range; 4) input and output voltage standing wave ratio (VSWR); 5) switching speed; 6) circuit size; 7) output power compression point (1dB); and 8) consistency of electrical performance between circuits. The main drawbacks of traditional frequency conversion components are: 1) fixed operating mode; 2) to avoid image frequency interference, the pre-filter segmentation requires at least 8 segments, necessitating at least 8 switching filter networks. The increased number of switching filter networks leads to increased insertion loss, requiring more amplifiers to compensate for gain; 3) the large number and variety of components make it difficult to reduce component size; and 4) poor channel phase consistency. Summary of the Invention

[0003] Technical problems to be solved

[0004] To avoid the shortcomings of existing technologies, this invention proposes a broadband multifunctional reconfigurable frequency converter component and a method for implementing reconfigurable frequency conversion. Based on traditional frequency converter components, it achieves functional reconfigurability, reduces component size, improves the suppression ratio of pre-selected filtering, and improves phase consistency.

[0005] Technical solution

[0006] A broadband multi-functional reconfigurable frequency converter component, characterized by comprising an RF transceiver matrix circuit, two high rejection ratio (HRRR) switched filter banks, and two frequency converter links; the RF transceiver matrix circuit includes four single-pole double-throw (SPDT) switches whose outputs are connected to four power dividers, and the four power dividers are connected to two switches, wherein: the two ports of switch A are respectively connected to the first power divider and the second power divider; the two ports of switch B are respectively connected to the first power divider and the third power divider; the two ports of switch C are respectively connected to the second power divider and the fourth power divider; and the two ports of switch D are respectively connected to the third power divider and the fourth power divider; the first power divider and the second power divider are connected to an SP2T (SP2T), and the third power divider... The outputs of the splitter and the fourth power splitter are connected to another SP2T. The two SP2Ts are each connected to their respective high rejection ratio (HRRR) switching filter banks, and each HRRR switching filter bank is connected to a frequency conversion link. When receiving signals, the RF transceiver matrix circuit combines the four RF signals into two RF signals. The two RF signals are then input to their respective frequency conversion links through their respective HRRR switching filter banks. Each frequency conversion link outputs two intermediate frequency (IF) signals, and the two frequency conversion links output four IF signals. When transmitting signals, the input RF signals are amplified by the signal drive circuit in the frequency conversion link, and then output after passing through the HRRR switching filter banks and the transceiver matrix.

[0007] The high suppression ratio switching filter bank adopts a two-stage silicon-based MEMS switching filter bank, with a high compression point amplifier connected between the two stages.

[0008] The frequency conversion link includes a down-converter circuit, a bandpass filter, and a signal drive circuit. The input terminal is an SP2T connected to a high rejection ratio switching filter bank. The input of the SP2T is connected to the signal drive circuit, and the input of the signal drive circuit is the transmitted radio frequency signal. The output of the SP2T is connected to the first down-converter circuit and the power divider. One output of the power divider is connected to the first bandpass filter, and the first bandpass filter outputs one intermediate frequency signal. The other output of the power divider is connected to the second down-converter circuit and the second bandpass filter, and the first bandpass filter outputs another intermediate frequency signal.

[0009] The first bandpass filter is a 1GHz bandpass filter.

[0010] The second bandpass filter is a 40MHz bandpass filter.

[0011] The radio frequency transceiver matrix circuit 1 employs a bidirectional amplifier and is used as a power divider when the frequency converter transmits signals.

[0012] A method for reconfigurable frequency conversion using the aforementioned broadband multi-functional reconfigurable frequency converter component, characterized by the following steps:

[0013] Received signal:

[0014] Step 1: Combine the four radio frequency signals A, B, C, and D into two radio frequency signals E and F; where E is equal to A+B or A+C; and F is equal to C+D or B+D.

[0015] Step 2: Use high rejection ratio switching filters to pre-filter the two RF signals respectively to obtain the pre-selected RF signal; the filtering corresponds to the subsequent filtering.

[0016] The pre-selection filter employs a two-stage, eight-segment filter; the signal is amplified at a high compression point between the two stages.

[0017] Step 3: The RF signal after pre-selection filtering is down-converted, mixed with the first local oscillator signal, and then output as two intermediate frequency signals through a power divider;

[0018] Step 4: One intermediate frequency signal is processed by bandpass filtering and output as an intermediate frequency signal with a bandwidth of 1 GHz, which is used as an electronic reconnaissance and active jamming signal;

[0019] Another intermediate frequency signal enters the downconversion frequency, and after being mixed twice with the second local oscillator signal, it is processed by bandpass filtering to output an intermediate frequency signal 2 with a bandwidth of 40MHz, which is used as a radar communication signal;

[0020] When transmitting a signal: the radio frequency signal is amplified by the signal driving circuit, then output by SP2T1, filtered by the high rejection ratio switch, and then amplified and divided into four paths by the radio frequency transceiver matrix, which acts as a power divider, before being transmitted.

[0021] The four radio frequency signals A, B, C, and D are the four radio frequency signals of the T / R module of the multi-functional jamming system array.

[0022] The E is A+B, and the RF signal F is C+D. The four signals are combined vertically to divide the array into left and right subarrays, which can form multiple columns of RF signals for grating-lobe-free omnidirectional broadband DBF.

[0023] The radio frequency signal E is A+C, and the radio frequency signal F is B+D. The four signals are combined left and right to divide the array into upper and lower subarrays, which can form a sum and difference beam for radar angle measurement.

[0024] Beneficial effects

[0025] This invention proposes a broadband multi-functional reconfigurable frequency converter and a method for implementing reconfigurable frequency conversion, comprising an RF transceiver matrix, a high rejection ratio (HRRR) switching filter bank, and a frequency conversion link. This frequency converter integrates transceiver functionality. In the receiving channel, the RF transceiver matrix combines four input RF signals and outputs two RF signals, which are then pre-filtered by the HRRR switching filter bank. Finally, the signals are mixed with the local oscillator signal via the frequency conversion link to output two intermediate frequency (IF) signals. In the transmitting channel, the RF signals are amplified by the drive circuit in the frequency conversion link before being output. This frequency converter outputs two bandwidth IF signals, which can be applied to electronic reconnaissance and radar operating scenarios respectively, and phase correction methods are used to reduce inter-channel phase errors.

[0026] Compared with existing technologies, the significant features of this technology are: 1. The frequency conversion component is reconfigurable, exhibiting selectable operating bandwidth, integrated transceiver functionality, and RF selectivity; 2. The preselection filter employs a two-stage silicon-based MEMS switching filter bank, with high compression point amplifiers added between stages to improve the suppression ratio of the preselection filter. Compared with traditional switching filter banks composed of discrete components, the size is significantly reduced. Attached Figure Description

[0027] Figure 1 This is a block diagram of the broadband multifunctional reconfigurable frequency converter circuit structure of the present invention;

[0028] Figure 2 This is a subarray signal allocation diagram of the present invention;

[0029] Figure 3 This is a block diagram of the radio frequency transceiver matrix circuit structure of the present invention;

[0030] Figure 4 This is a block diagram of the high rejection ratio switching filter bank circuit structure of the present invention;

[0031] Figure 5 This is a block diagram of the frequency conversion link circuit structure of the present invention. Detailed Implementation

[0032] The present invention will now be further described in conjunction with the embodiments and accompanying drawings:

[0033] A broadband multi-functional reconfigurable frequency converter, characterized in that it comprises:

[0034] Radio frequency transceiver matrix circuit 1: Four radio frequency signals are output as two radio frequency signals after passing through radio frequency transceiver matrix circuit 1. Through the switching matrix in radio frequency transceiver matrix circuit 1, the two radio frequency signals have two combination forms to meet the different subarray structures in the electronic countermeasures system. At the same time, radio frequency transceiver matrix circuit 1 adopts a bidirectional amplifier, which can be used as a power divider when the frequency conversion component transmits signals.

[0035] High Rejection Ratio Switched Filter Bank 2: The frequency converter component uses the high rejection ratio switched filter bank 2 to pre-filter the RF signal. To achieve a high rejection ratio, this switched filter bank consists of two identical 8-channel switched filters. This design allows for segmented processing of the received RF signal, meeting wide bandwidth requirements. It also employs a two-stage silicon-based MEMS switched filter bank, with high compression point amplifiers added between stages to improve the rejection ratio of the pre-selected filter. Compared to traditional switched filter banks composed of discrete components, the size is significantly reduced.

[0036] Frequency Conversion Link 3: The frequency conversion link consists of a down-conversion circuit and a signal drive circuit. In the down-conversion circuit, the input RF signal is first converted and then output as two intermediate frequency (IF) signals via a power divider. One IF signal is output through a 1GHz bandpass filter; the other IF signal is second-converted and then output through a 40MHz bandpass filter. In the signal drive circuit, the input RF signal is amplified and then passed through a high rejection ratio (HRRR) switching filter bank and a transceiver matrix before being output.

[0037] The frequency converter component is reconfigurable, exhibiting the following characteristics: ① Selectable operating bandwidth: This frequency converter component outputs intermediate frequency signals with two bandwidths, which can be applied to electronic reconnaissance and radar operating scenarios respectively; ② Integrated transceiver: Compared with the traditional frequency converter component design, the circuit design adopted in this invention has the function of fast switching between signal reception and transmission; ③ Radio frequency selectivity: The four radio frequency signals of this frequency converter component can be output in two combinations through a switching matrix to meet different operating modes in electronic countermeasures systems.

[0038] The preselective filter employs a two-stage silicon-based MEMS switched filter bank, with a high compression point amplifier added between stages to improve the suppression ratio of the preselective filter. Compared with traditional switched filter banks composed of discrete components, the size is significantly reduced.

[0039] The phase correction method is adopted, using the phase of one of the four RF outputs as a reference, and adjusting the phase of the other three outputs to control the phase error between channels within ±15°.

[0040] like Figure 1 As shown, the present invention provides a broadband multi-functional reconfigurable frequency converter that can be applied to a multi-functional interference system.

[0041] Upon receiving signals, this frequency converter receives four RF signals from the T / R module of the multi-functional interference system array. These four RF signals, A, B, C, and D, enter RF transceiver matrix 1. Each signal passes through a single-pole double-throw switch, and the output is selected according to the system control requirements, corresponding to the output of the subsequent power divider. Assuming RF signal A is output from port a to power divider 1 via SP2T1, RF signal B is output from port a to power divider 1 via SP2T2, RF signal C is output from port b to power divider 4 via SP2T3, and RF signal D is output from port b to power divider 4 via SP2T4, the resulting output RF signal E is A+B, and the RF signal F is C+D. Figure 2 This combination method allows the four signals to be combined vertically to divide the array into left and right subarrays, which can form multiple columns of radio frequency signals for wideband DBF without grid lobe. Similarly, radio frequency signal E can also be A+C, and radio frequency signal F can be B+D. This combination method allows the four signals to be combined horizontally to divide the array into upper and lower subarrays, which can form sum and difference beams for radar angle measurement.

[0042] The two RF signals from the RF transceiver matrix 1 are then pre-selected by a high rejection ratio (HRRR) switching filter bank (2). The HRR switching filter bank is composed of two identical 8-channel switching filters cascaded through a bidirectional amplifier. Figure 3 As shown, when receiving a signal, the radio frequency (RF) signal enters from terminal A of switch filter bank 1. It first passes through a single-pole multi-throw (SPMD) switch U1. According to system control requirements, the switch output corresponding to the subsequent filter is selected. Assuming that channel 1 of SPMD switches U1 and U2 in switch filter banks 1 and 2 is simultaneously open, and the other channels are closed, the signal path should be A-B1-C1-DA-B1-C1-D. Finally, the RF signal is output from terminal D of switch filter 2. Similarly, when receiving a signal, the RF signal path can be A-Bn-Cn-DA-Bn-Cn-D, where n = 1 to 8 (positive integers). Likewise, when transmitting a signal, the RF signal enters from terminal D of switch filter 2 and outputs from terminal A of switch filter 1. The transmitted signal path can be D-Cn-Bn-A-Dn-Cn-Bn-A, where n = 1 to 8 (positive integers).

[0043] After pre-selection filtering, the RF signal is selected to enter the downconverter circuit 1 through the single-off double-throw switch of the frequency conversion link 3. After the RF signal is mixed with the local oscillator signal 1, it is output as two intermediate frequency signals by the power divider. One intermediate frequency signal is output as an intermediate frequency signal 1 with a bandwidth of 1GHz through the bandpass filter 1. The other intermediate frequency signal enters the downconverter circuit 2, is mixed with the local oscillator signal 2 twice, and is sent to the bandpass filter 2 to output an intermediate frequency signal 2 with a bandwidth of 40MHz.

[0044] When transmitting a signal, the radio frequency signal passes through the signal driving circuit, then is output through SP2T1, and sent to the high rejection ratio switching filter bank 2. After being split into four paths by the radio frequency transceiver matrix 1, it is output.

Claims

1. A broadband multi-functional reconfigurable frequency converter, characterized in that... The system includes an RF transceiver matrix circuit, two high rejection ratio (HRRR) switched filter banks, and two frequency conversion links. The RF transceiver matrix circuit comprises four single-pole double-throw (SPDT) switches whose outputs are connected to four power dividers. Each power divider is connected to two switches: switch A's two ports are connected to the first and second power dividers, switch B's two ports are connected to the first and third power dividers, switch C's two ports are connected to the second and fourth power dividers, and switch D's two ports are connected to the third and fourth power dividers. The first and second power dividers are connected to an SP2T (Special Power Transmitter), and the outputs of the third and fourth power dividers are connected to... The output is connected to another SP2T. The two SP2Ts are each connected to their respective high rejection ratio (HRRR) switching filter banks. Each HRRR switching filter bank is connected to a frequency conversion link. When receiving signals, the RF transceiver matrix circuit combines the four RF signals into two RF signals. The two RF signals are input to their respective frequency conversion links through their respective HRRR switching filter banks. Each frequency conversion link outputs two IF signals, and the two frequency conversion links output four IF signals. When transmitting signals, the input RF signals are amplified by the signal drive circuit in the frequency conversion link, and then output after passing through the HRRR switching filter bank and the transceiver matrix.

2. The broadband multi-functional reconfigurable frequency converter component according to claim 1, characterized in that: The high suppression ratio switching filter bank adopts a two-stage silicon-based MEMS switching filter bank, with a high compression point amplifier connected between the two stages.

3. The broadband multi-functional reconfigurable frequency converter component according to claim 1, characterized in that: The frequency conversion link includes a down-conversion circuit, a bandpass filter, and a signal drive circuit; The input terminal is an SP2T connected to a high rejection ratio switching filter bank. The input of the SP2T is connected to a signal driving circuit, and the input of the signal driving circuit is the transmitted radio frequency signal. The output of the SP2T is connected to the first down-converter circuit and the power divider. One output of the power divider is connected to the first bandpass filter, and the first bandpass filter outputs one intermediate frequency signal. The other output of the power divider is connected to the second down-converter circuit and the second bandpass filter, and the first bandpass filter outputs another intermediate frequency signal.

4. The broadband multi-functional reconfigurable frequency converter according to claim 3, characterized in that: The first bandpass filter is a 1GHz bandpass filter.

5. The broadband multi-functional reconfigurable frequency converter according to claim 3, characterized in that: The second bandpass filter is a 40MHz bandpass filter.

6. The broadband multi-functional reconfigurable frequency converter according to claim 1, characterized in that: The radio frequency transceiver matrix circuit (1) uses a bidirectional amplifier and is used as a power divider when the frequency converter transmits signals.

7. A method for implementing reconfigurable frequency conversion using the broadband multifunctional reconfigurable frequency converter component according to any one of claims 1 to 6, characterized in that... The steps are as follows: Received signal: Step 1: Combine the four radio frequency signals A, B, C, and D into two radio frequency signals E and F; where E is equal to A+B or A+C; and F is equal to C+D or B+D. Step 2: Use high rejection ratio switching filters to pre-filter the two RF signals respectively to obtain the pre-selected RF signal; the filtering corresponds to the subsequent filtering. The pre-selection filter employs a two-stage, eight-segment filter; the signal is amplified at a high compression point between the two stages. Step 3: The RF signal after pre-selection filtering is down-converted, mixed with the first local oscillator signal, and then output as two intermediate frequency signals through a power divider; Step 4: One intermediate frequency signal is processed by bandpass filtering and output as an intermediate frequency signal with a bandwidth of 1 GHz, which is used as an electronic reconnaissance and active jamming signal; Another intermediate frequency signal enters the downconversion frequency, and after being mixed twice with the second local oscillator signal, it is processed by bandpass filtering to output an intermediate frequency signal 2 with a bandwidth of 40MHz, which is used as a radar communication signal; When transmitting a signal: the radio frequency signal is amplified by the signal driving circuit, then output by SP2T1, filtered by the high rejection ratio switch, and then amplified and divided into four paths by the radio frequency transceiver matrix, which acts as a power divider, before being transmitted.

8. The method according to claim 7, characterized in that: The four radio frequency signals A, B, C, and D are the four radio frequency signals of the T / R module of the multi-functional jamming system array.

9. The method according to claim 7, characterized in that: The E is A+B, and the RF signal F is C+D. The four signals are combined vertically to divide the array into left and right subarrays, which can form multiple columns of RF signals for grating-lobe-free omnidirectional broadband DBF.

10. The method according to claim 7, characterized in that: The radio frequency signal E is A+C, and the radio frequency signal F is B+D. The four signals are combined left and right to divide the array into upper and lower subarrays, which can form a sum and difference beam for radar angle measurement.

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