A radio frequency noise rejection circuit and a distributed power multi-beam transmitter

Abstract

The present application relates to a kind of distributed power supply multi-beam transmitter radio frequency noise suppression circuit, including two sets of high voltage power supply consisting of low voltage power supply and control protection module, motherboard and 18 small high voltage power module;Through the synchronous clock sent by the low voltage power supply and control protection module, the frequency and phase synchronization of the high voltage ripple output by 18 small high voltage power supply are completed, so as to realize the suppression of the radio frequency noise of multi-beam transmitter caused by the ripple output by distributed power supply high voltage power supply.The circuit of the present application can realize the suppression of the parasitic radio frequency noise of distributed power supply multi-beam transmitter.

Description

Technical Field

[0001] This invention belongs to the field of traveling wave tube transmitter technology, specifically a radio frequency noise suppression circuit and a distributed power supply multi-beam transmitter. Background Technology

[0002] In electronic warfare, multi-beam transmitters utilize beamforming technology to enhance effective radiated power and enable rapid beam switching, allowing for simultaneous jamming of multiple targets. However, if a multi-beam transmitter uses centralized high-voltage power, it becomes difficult to isolate the faulty traveling wave tube branch in case of arcing, leakage, or insufficient electrode withstand voltage in a single traveling wave tube, leading to decreased fault isolation and mission reliability. Conversely, using distributed high-voltage power supply, where a miniaturized high-voltage power supply module array powers a single traveling wave tube from a single high-voltage power supply, can improve fault isolation and mission reliability. However, this introduces a problem: the output ripple of the distributed high-voltage power supply exhibits frequency and phase dispersion, acting as a broadband parasitic noise superimposed on the main RF output, thus degrading the spectral quality of the multi-beam transmitter's transmitted signal. Summary of the Invention

[0003] The purpose of this invention is to provide a radio frequency noise suppression circuit.

[0004] The technical solution to achieve the purpose of this invention is as follows: a radio frequency noise suppression circuit, comprising: N sets of high-voltage power supplies, each set of high-voltage power supplies including M miniaturized high-voltage power supply modules, 1 low-voltage power supply and control protection module, and a motherboard. The miniaturized high-voltage power supply module includes a differential isolation driver, a differential-to-single-ended circuit, and a high-voltage power supply pulse width control circuit. The low-voltage power supply and control protection module is used to transfer the low-voltage power supply, synchronous clock, and communication bus from the cable to the motherboard. The M miniaturized high-voltage power supply modules are connected to the motherboard, and the low-voltage power supply, synchronous clock, and communication bus are distributed and networked through the motherboard. The differential synchronous clock sent from the motherboard is converted into a single-ended synchronous clock by the differential isolation driver and the differential-to-single-ended circuit. The single-ended synchronous clock is sent to the high-voltage power supply pulse width control circuit, which outputs a switching pulse modulation waveform.

[0005] Preferably, the low-voltage power supply and protection module includes a DSP, a single-ended to differential circuit, and a differential isolation driver; the DSP (3021) in the low-voltage power supply and protection module (302) generates a single-ended synchronous clock signal, which is converted into a differential synchronous clock signal after passing through the single-ended to differential circuit, and the differential synchronous clock signal is sent to the motherboard after passing through the differential isolation driver.

[0006] Preferably, the switching pulse modulation waveform output by the high-voltage power supply pulse width control circuit has the same frequency and constant phase difference as the single-ended synchronous clock.

[0007] Preferably, the cathode high voltage ripple frequency and phase output by the M miniaturized high voltage power supply modules are the same.

[0008] Preferably, the frequency f of the single-ended synchronous clock is... sync The oscillation frequency f is higher than that generated by the high-voltage power supply pulse width control circuit itself. local .

[0009] Preferably, f sync >110%f local

[0010] This invention also proposes a distributed power supply multi-beam transmitter, comprising: a first three-phase filter, a second three-phase filter, an RF noise suppression circuit, a first 18-element amplitude-coherent traveling wave tube (TWT) amplifier array, a second 18-element amplitude-coherent TWT amplifier array, and a 36-element broadband array antenna; the RF noise suppression circuit includes a first high-voltage power supply and a second high-voltage power supply, the first high-voltage power supply and the second high-voltage power supply providing 18 distributed high-voltage power supplies to the first 18-element amplitude-coherent TWT amplifier array and the second 18-element amplitude-coherent TWT amplifier array respectively, the first 18-element amplitude-coherent TWT amplifier array and the second 18-element amplitude-coherent TWT amplifier array being connected to the 36-element broadband array antenna to complete the RF signal amplification and radiation into space.

[0011] Compared with the prior art, the significant advantages of this invention are: the invention uses the synchronization clock sent by the low-voltage power supply and control protection module to synchronize the frequency and phase of the high-voltage ripple output by 18 miniaturized high-voltage power supplies, thereby suppressing the radio frequency noise of the multi-beam transmitter caused by the output ripple of the distributed power supply high-voltage power supply. This allows the use of distributed high-voltage power supply to improve the fault isolation and mission reliability of the multi-beam transmitter while ensuring a high-quality transmission signal spectrum. Attached Figure Description

[0012] Figure 1 This is a partial functional block diagram of a distributed power supply multi-beam transmitter.

[0013] Figure 2 This is a functional block diagram of the high-voltage power supply of the present invention.

[0014] Figure 3 This is a functional block diagram of the distributed power supply multi-beam transmitter radio frequency noise suppression circuit of the present invention. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] As one example, such as Figure 3As shown, a radio frequency noise suppression circuit includes: two sets of high-voltage power supplies, each set of high-voltage power supplies including 18 miniaturized high-voltage power supply modules 301, one low-voltage power supply and control protection module 302, and a motherboard 303. The miniaturized high-voltage power supply module 301 includes a differential isolation driver 3011, a differential-to-single-ended circuit 3012, and a high-voltage power supply pulse width control circuit 3013. The low-voltage power supply and control protection module 302 is used to transfer the low-voltage power supply, synchronous clock, and communication bus from the cable to the motherboard. M miniaturized high-voltage power supply modules are connected to the motherboard 303, and the low-voltage power supply, synchronous clock, and communication bus are distributed and networked through the motherboard. The differential synchronous clock sent from the motherboard 303 is converted into a single-ended synchronous clock by the differential isolation driver 3011 and the differential-to-single-ended circuit 3012. The single-ended synchronous clock is sent to the high-voltage power supply pulse width control circuit 3013, and the high-voltage power supply pulse width control circuit 3013 outputs a switching pulse modulation waveform.

[0017] In a further embodiment, the low-voltage power supply and protection module 302 includes a DSP 3021, a single-ended to differential circuit 3022, and a differential isolation driver 3023. The DSP 3021 in the low-voltage power supply and protection module 302 generates a single-ended synchronous clock signal. This signal is converted into a differential synchronous clock signal after passing through the single-ended to differential circuit 3022. The differential synchronous clock signal is then sent to the motherboard after passing through the differential isolation driver 3023. The differential synchronous clock sent from the motherboard first passes through the differential isolation driver 3011 in each miniaturized high-voltage power supply module 301, and then is converted into a single-ended synchronous clock by the differential to single-ended circuit 3012. The single-ended synchronous clock is then sent to the high-voltage power supply pulse width control circuit 3013 to complete synchronization.

[0018] In a further embodiment, the switching pulse modulation waveform output by the high-voltage power supply pulse width control circuit 3013 has the same frequency and constant phase difference as the single-ended synchronous clock.

[0019] In a further embodiment, the cathode high-voltage ripple frequencies and phases output by the 18 miniaturized high-voltage power supply modules 301 are all identical. The main spectrum of the RF output after amplification by the traveling wave tube contains parasitic noise generated by the cathode high-voltage ripple of the traveling wave tube. The frequency shift between this parasitic noise and the main spectrum is equal to the cathode high-voltage ripple frequency. After synchronization, the cathode high-voltage ripple frequencies and phases output by the 18 miniaturized high-voltage power supply modules 301 are identical. The broadband parasitic noise generated by the cathode high-voltage ripple in the 18 amplitude-phase consistent traveling wave tube amplification array units 5 and 6 is synchronized to the same frequency point, reducing the spectral width of parasitic noise caused by the distributed power supply and achieving suppression of RF noise in the distributed power supply multi-beam transmitter.

[0020] Specifically, the differential synchronous clock achieves electrical isolation between the DSP3021 and the synchronous clock bus through the differential drive isolator 3023.

[0021] Specifically, the differential synchronization clock achieves electrical isolation between the high-voltage power pulse width control circuit 3013 and the synchronization clock bus in the miniaturized high-voltage power module 301 through the differential drive isolator 3011.

[0022] Specifically, the electrical isolation between the DSP3021 and the synchronous clock bus, and the electrical isolation between the high-voltage power supply pulse width control circuit 3013 and the synchronous clock bus, are achieved, thereby reducing mutual interference in the synchronous clock network and improving the signal quality of the synchronous clock.

[0023] Specifically, differential matching resistors are designed at both ends of the synchronous clock bus of the motherboard 303.

[0024] In a further embodiment, the frequency f of the single-ended synchronous clock signal sync The oscillation frequency f is set higher than that generated by the high-voltage power supply pulse width control circuit 3013 itself. local Specific, setting f sync >110%f local The miniaturized high-voltage power supply module 301 is designed with a switching frequency redundancy range that simultaneously meets both frequency ranges. When the clock synchronization circuit fails or is interfered with and cannot work normally, the high-voltage power supply pulse width control circuit 3013 will use its own generated oscillation frequency f. local Complete the switching transformation to improve the reliability of equipment tasks.

[0025] The distributed power supply multi-beam transmitter RF noise suppression circuit of the present invention achieves frequency and phase synchronization of the high voltage ripple output by 18 miniaturized high voltage power supplies through the synchronization clock sent by the low voltage power supply and control protection module. This enables the suppression of RF noise of the multi-beam transmitter caused by the output ripple of the distributed power supply high voltage power supply, thus ensuring high-quality transmission signal spectrum while improving the fault isolation and mission reliability of the multi-beam transmitter using distributed high voltage power supply.

[0026] This invention uses a synchronization clock sent from a low-voltage power supply and control protection module to synchronize the frequency and phase of the high-voltage ripple output from 18 miniaturized high-voltage power supplies, thereby suppressing the radio frequency noise of the multi-beam transmitter caused by the output ripple of the distributed high-voltage power supply. This allows for the use of distributed high-voltage power supply to improve the fault isolation and mission reliability of the multi-beam transmitter while ensuring a high-quality transmission signal spectrum.

[0027] As another embodiment, such as Figure 1As shown, a distributed power supply multi-beam transmitter includes: a first three-phase filter 1, a second three-phase filter 2, a first 18-element amplitude-coherent traveling wave tube amplifier array 5, a second 18-element amplitude-coherent traveling wave tube amplifier array 6, a 36-element broadband array antenna 7, and the radio frequency noise suppression circuit described in the above embodiment, namely two sets of high-voltage power supplies: a first high-voltage power supply 3 and a second high-voltage power supply 4; the radio frequency noise suppression circuit includes the first high-voltage power supply 3 and the second high-voltage power supply 4, which provide 18 distributed high-voltage power supplies to the first 18-element amplitude-coherent traveling wave tube amplifier array 5 and the second 18-element amplitude-coherent traveling wave tube amplifier array 6, respectively. The first 18-element amplitude-coherent traveling wave tube amplifier array 5 and the second 18-element amplitude-coherent traveling wave tube amplifier array 6 are connected to the 36-element broadband array antenna 7 to complete the radio frequency signal amplification and radiation into space.

[0028] Specifically, the first high-voltage power supply 3 and the second high-voltage power supply 4 provide 18 distributed high-voltage power supplies to the first 18-element amplitude-consistent traveling wave tube amplification array 5 and the second 18-element amplitude-consistent traveling wave tube amplification array 6, respectively. The first 18-element amplitude-consistent traveling wave tube amplification array 5 and the second 18-element amplitude-consistent traveling wave tube amplification array 6 are connected to a 36-element broadband array antenna 7 to complete the radio frequency signal amplification and then radiate it into space.

[0029] like Figure 2 The high-voltage power supply shown includes: 18 miniaturized high-voltage power supply modules 301, 1 low-voltage power supply and control module 302, and a motherboard 303. The low-voltage power supply and control module 302 connects the low-voltage power supply, synchronous clock, and communication bus to the motherboard 303 via cables. The 18 miniaturized high-voltage power supply modules 301 are connected to the motherboard 303 to complete the distribution and networking of low-voltage power supply, synchronous clock, and communication bus.

[0030] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A radio frequency noise rejection circuit, characterized by, It includes: N sets of high-voltage power supply, each set of high-voltage power supply includes M small high-voltage power supply module (301), 1 low-voltage power supply and control module (302) and a motherboard (303), the small high-voltage power supply module (301) includes first differential isolation driver (3011), differential to single-ended circuit (3012), high-voltage power supply pulse width control circuit (3013), the low-voltage power supply and control module (302) is used for connecting low-voltage power supply, synchronous clock, communication bus from cable to motherboard, M small high-voltage power supply module is docked with motherboard (303), and low-voltage power supply, synchronous clock, communication bus distribution networking is completed through the motherboard, the differential synchronous clock sent by the motherboard (303) passes through the first differential isolation driver (3011), and is converted into single-ended synchronous clock through the differential to single-ended circuit (3012), and the single-ended synchronous clock is sent to the high-voltage power supply pulse width control circuit (3013), and the high-voltage power supply pulse width control circuit (3013) outputs switch pulse modulation waveform.

2. The radio frequency noise rejection circuit of claim 1, wherein, The low-voltage power supply and control module (302) includes DPS (3021), single-ended to differential circuit (3022) and second differential isolation driver (3023);The DSP (3021) in the low-voltage power supply and control module (302) generates a single-ended synchronous clock signal, which is converted into a differential synchronous clock signal after the single-ended to differential circuit (3022), and the differential synchronous clock signal is sent to the motherboard (303) after the second differential isolation driver (3023).

3. The radio frequency noise rejection circuit of claim 1, wherein, The switch pulse modulation waveform output by the high-voltage power supply pulse width control circuit (3013) has the same frequency and constant phase difference as the single-ended synchronous clock.

4. The radio frequency noise rejection circuit of claim 1, wherein, The M small high-voltage power supply modules (301) output the same frequency and phase of the cathode high-voltage ripple.

5. The radio frequency noise rejection circuit of claim 1, wherein, The frequency f of the single-ended synchronous clock sync The oscillation frequency f generated by the high-voltage power supply pulse width control circuit (3013) itself local .

6. The radio frequency noise rejection circuit of claim 5, wherein, f sync > 110% local .

7. A distributed power multi-beam transmitter, characterized by It includes: First three-phase filter (1), second three-phase filter (2), radio frequency noise suppression circuit as claimed in any one of claims 1~6, first 18-element amplitude and phase consistent traveling wave tube amplification array (5), second 18-element amplitude and phase consistent traveling wave tube amplification array (6), 36-element broadband array antenna (7);The radio frequency noise suppression circuit includes first high-voltage power supply (3), second high-voltage power supply (4), the first high-voltage power supply (3), second high-voltage power supply (4) provides 18 distributed high-voltage power supply for first 18-element amplitude and phase consistent traveling wave tube amplification array (5), second 18-element amplitude and phase consistent traveling wave tube amplification array (6), the first 18-element amplitude and phase consistent traveling wave tube amplification array (5), second 18-element amplitude and phase consistent traveling wave tube amplification array (6) is connected with 36-element broadband array antenna (7) to complete the amplification of radio frequency signal and then radiate to space.

Images