CN117155294A - Miniaturized multimode variable frequency assembly of X-Ka wave band - Google Patents

Abstract

The invention discloses an X-Ka band miniaturized multimode variable frequency component, which is applied to the technical field of centimeter to millimeter waves and aims at solving the problems that the traditional variable frequency component has narrower receiving input frequency bandwidth, small signal linear working power range, higher noise coefficient and low intermediate frequency suppression and image frequency suppression in a miniaturized structure; according to the invention, corresponding mode links are selected according to different input signal powers; the dynamic range of the component is widened; the input frequency is amplified and filtered in a segmented way before broadband frequency mixing; the noise coefficient of the component is obviously improved, and the intermediate frequency inhibition and image frequency inhibition capability is relatively high; and all the radio frequency devices adopt micro-assembly structures, so that the assembly is small in size and high in integration level.

Description

Miniaturized multimode variable frequency assembly of X-Ka wave band

Technical Field

The invention belongs to the technical field of centimeter to millimeter wave, and particularly relates to an X-Ka band miniaturized multi-mode frequency conversion assembly.

Background

In radio frequency and microwave transceiver systems, the frequency conversion component plays an indispensable role in input frequency conversion. The method converts the input broadband signal into an intermediate frequency signal with lower frequency, and provides guarantee for the digital processing of a subsequent receiver.

In a miniaturized structure, the traditional frequency conversion assembly has the advantages of narrow receiving input frequency bandwidth, small signal linear working power range, high noise coefficient and low intermediate frequency suppression and image frequency suppression; this results in a miniaturized structure in which the receiver receives a range of frequencies, the processing signal power is greatly limited, and the recognition ability for external interference signals is weak.

Disclosure of Invention

The invention aims to provide a miniaturized multi-mode variable frequency component with X-Ka wave band, which is miniaturized, ultra-wide in bandwidth, high in linear dynamic performance, low in noise coefficient, high in intermediate frequency suppression and high in image frequency suppression.

The technical scheme of the invention is as follows: an X-Ka band miniaturized multimode variable frequency assembly comprising: the device comprises a mode unit, a preselection unit, a frequency conversion unit and an intermediate frequency unit; the external X-Ka wave band signals enter different mode channels of the mode unit according to the power, then enter the preselection unit after being processed by the mode unit, and enter corresponding amplifying and filtering channels according to the different frequencies to carry out power amplification and spurious filtering; the signal output by the preselection unit outputs a corresponding intermediate frequency signal through frequency mixing in the frequency conversion unit, and the intermediate frequency signal output by the frequency conversion unit is amplified, filtered and attenuated by the intermediate frequency unit and then output.

The mode unit includes: a low distortion mode link, a low noise mode link, a normal mode link, dividing an external X-Ka band signal into a high power signal, a low power signal, a medium power signal; the low-distortion mode link is used for inputting a high-power signal to enable the high-power signal to work linearly; the low noise mode link is used for inputting a low power signal to enable the low power signal to work linearly; the normal mode link is used to input a medium power signal to operate linearly.

The preselection unit includes: the device comprises a K-band signal amplifying and filtering channel, a Ka-band signal amplifying and filtering channel, a Ku-band high-frequency signal amplifying and filtering channel, a Ku-band low-frequency signal amplifying and filtering channel and an X-band signal amplifying and filtering channel; the preselection unit selects corresponding amplifying and filtering channels for the signals output by the mode unit according to the frequency, and performs power amplification and spurious filtering.

The invention has the beneficial effects that: the common frequency conversion assembly has small volume, so that the input frequency band is narrower, the power range is smaller, and the performance index is poorer; for a component with wider input frequency band, larger power range and higher performance index, the volume of the component is larger; the component design module has the advantages of small volume, wide input frequency band, large power range and high performance index. The mode unit increases the dynamic range of the module and reduces the noise coefficient; the preselection unit meets the indexes of intermediate frequency inhibition and image frequency inhibition; the frequency conversion unit converts the radio frequency signal into an intermediate frequency signal; the intermediate frequency unit further processes the converted intermediate frequency signal;

the invention relates to an X-Ka band miniaturized multi-mode frequency conversion assembly which comprises a mode unit, a preselection unit, a frequency conversion unit and an intermediate frequency unit. The external X-Ka wave band signals select different channels in the mode unit according to the power, the pre-selection unit filters and amplifies the input signals, the input signals enter the frequency conversion unit to mix out intermediate frequency signals, and finally the signals are filtered, amplified and attenuated in the intermediate frequency unit to output the required intermediate frequency signals; compared with the traditional scheme, the invention has the following advantages:

(1) The input frequency bandwidth of the module is large, all radio frequency devices adopt micro-assembly structures, the assembly volume is small, and the integration level is high;

(2) Selecting a corresponding mode link according to different input signal power; the dynamic range of the component is widened;

(3) The input frequency is amplified and filtered in a segmentation way before broadband frequency mixing; the noise coefficient of the component is obviously improved, and the intermediate frequency rejection and image rejection capability is high.

Drawings

FIG. 1 is a schematic diagram of a circuit structure of an X-Ka band miniaturized multimode variable frequency assembly of the invention;

FIG. 2 is a physical diagram of the miniaturized multimode variable frequency assembly of the present invention in the X-Ka band;

wherein, (a) is a frequency conversion surface, and (b) is a power supply and control surface;

reference numerals illustrate: 1. a limiter; 2. a first single pole four throw switch; 3. a first attenuator; 4. a first wideband low noise amplifier; 5. a second attenuator; 6. a second broadband low noise amplifier; 7. a third attenuator; 8. a fourth attenuator; 9. a second single pole four throw switch; 10. a first single pole four throw switch; 11. a first band-pass filter; 12. a first low noise amplifier; 13. a second band-pass filter; 14. a third band-pass filter; 15. a second low noise amplifier; 16. a fourth band-pass filter; 17. a first attenuator; 18. a second attenuator; 19. a third attenuator; 20. a second single pole four throw switch; 21. a first high pass filter; 22. a first single pole, triple throw switch; 23. a fifth band-pass filter; 24. a third low noise amplifier; 25. a sixth band-pass filter; 26. a seventh band-pass filter; 27. a fourth low noise amplifier; 28. an eighth bandpass filter; 29. a ninth band-pass filter; 30. a fifth low noise amplifier; 31. a tenth band-pass filter; 32. a second single pole, triple throw switch; a second high pass filter 33; 34. a first mixer; 35. a second mixer; 36. a band-pass filter; 37. a low pass filter; 38. an amplifier; 39. a first single pole double throw switch, 40, a second single pole double throw switch; 41. a frequency multiplier; 42. a third single pole double throw switch; 43. a miniaturized frequency source; 44. a first intermediate frequency band pass filter; 45. an intermediate frequency low pass filter; 46. a second intermediate frequency band pass filter; 47. an intermediate frequency single pole double throw switch; 48. a third intermediate frequency band pass filter; 49. a first intermediate frequency amplifier; 50. a first digitally controlled attenuator; 51. a second intermediate frequency amplifier; 52. an intermediate frequency temperature compensation attenuator; 53. the second intermediate frequency digital control attenuator.

Detailed Description

The present invention will be further explained below with reference to the drawings in order to facilitate understanding of technical contents of the present invention to those skilled in the art.

The invention relates to an X-Ka band miniaturized multimode variable frequency component, which comprises a mode unit, a preselection unit, a variable frequency unit and an intermediate frequency unit, wherein the structures of the units are shown in figure 1.

The mode unit comprises a limiter 1, a first single-pole four-throw switch 2, a first attenuator 3, a first broadband low noise amplifier 4, a second attenuator 5, a second broadband low noise amplifier 6, a third attenuator 7, a fourth attenuator 8 and a second single-pole four-throw switch 9.

Since the mode unit has three modes, the input frequency range of the component is wide. And finally selecting a single-pole four-throw switch. The multimode frequency conversion construction of the invention requires intermediate frequency and image rejection > 80dB. Therefore, an attenuator is added on the spare pin of the single-pole four-throw switch, and other channel signals are prevented from leaking through the spare pin.

Further, the first attenuator 3 with low distortion mode in the mode unit is mainly used for inputting high power signal, so that the first attenuator works linearly; the first broadband low-noise amplifier 4 and the second broadband low-noise amplifier 6 in the low-noise mode are mainly used for low-power signal input so as to enable the low-power signal input to work linearly; the normal mode, i.e. the through mode, is mainly used for medium power signal input, so that it works linearly.

The power symbol is denoted as P, the high power range in the present invention is: -10dBm < P < 20dBm; the medium power range is: -50dBm < P < minus 10dBm; the low power range is: -100dBm < P < minus 50dBm; high power selection low distortion mode; medium power selects normal true mode; the low power selects the low noise mode.

The control mode of the single-pole multi-throw switch in the invention comprises the following specific steps: channel switching is performed by changing the voltage of the device control voltage port. The change of the control voltage is controlled by the power supply and the control board.

The control board of the frequency conversion assembly controls the switching voltage under the condition that the frequency and the amplitude of the input signal are known, so that the corresponding channel link is connected, and the non-related link channels are disconnected. For example: and when the K-band low-power signal enters the component, the control board turns on the low-noise mode by controlling the control voltage of the first single-pole four-throw switch (2) and the second single-pole four-throw switch (9) in the mode unit, and the pre-selection unit turns on the K-band link by controlling the control voltage of the first single-pole four-throw switch (10) and the second single-pole four-throw switch (20) in the mode unit to turn off the Ka-band link.

The preselection unit includes a first single pole four throw switch 10, a first band pass filter 11, a first low noise amplifier 12, a second band pass filter 13, a third band pass filter 14, a second low noise amplifier 15, a fourth band pass filter 16, a first attenuator 17, a second attenuator 18, a third attenuator 19, a second single pole four throw switch 20, a first high pass filter 21, a first single pole three throw switch 22, a fifth band pass filter 23, a third low noise amplifier 24, a sixth band pass filter 25, a seventh band pass filter 26, a fourth low noise amplifier 27, an eighth band pass filter 28, a ninth band pass filter 29, a fifth low noise amplifier 30, a tenth band pass filter 31, a second single pole three throw switch 32, and a second high pass filter 33.

The X-Ka band of the present invention is divided into 5 bands: first frequency band X-band: 8-12.5GHz; the second frequency band Ku low band: 12.3-14.5GHz; third frequency band Ku high band: 14.3-18GHz; fourth frequency band K band: 18-26GHz; fifth frequency band Ka band: 26-32GHz.

Further, the first band-pass filter 11 and the second band-pass filter 13 in the pre-selection unit are mainly used for filtering the input K-band signals, so that spurious signals have no influence on subsequent intermediate frequency signals; the first low noise amplifier 12 is mainly used for amplifying an input K-band signal and reducing noise coefficients.

Further, the third band-pass filter 14 and the fourth band-pass filter 16 in the pre-selecting unit are mainly used for filtering the input Ka-band signals, so that spurious signals have no influence on subsequent intermediate frequency signals; the second low noise amplifier 15 is mainly used for amplifying the input Ka band signal and reducing the noise coefficient.

Further, the fifth band-pass filter 23 and the sixth band-pass filter 25 in the preselection unit are mainly used for filtering the input Ku band high-frequency signals, so that spurious signals have no influence on subsequent intermediate-frequency signals; the third low noise amplifier 24 is mainly used for amplifying the input Ku band high frequency signal and reducing the noise coefficient.

Further, the seventh band-pass filter 26 and the eighth band-pass filter 28 in the preselection unit are mainly used for filtering the low-frequency signal of the input Ku band, so that the spurious signals have no influence on the subsequent intermediate-frequency signal; the fourth low noise amplifier 27 is mainly used for amplifying the input Ku band low frequency signal and reducing the noise figure.

Further, the ninth band-pass filter 29 and the tenth band-pass filter 31 in the preselection unit are mainly used for filtering the input X-band signal, so that the spurious signals have no influence on the subsequent intermediate frequency signals; the fifth low noise amplifier 30 is mainly used for amplifying the input X-band signal and reducing the noise factor.

Further, the first high-pass filter 21 in the pre-selecting unit is mainly used for filtering out the frequency signal lower than the K band, so that the spurious signals have no influence on the subsequent intermediate frequency signals; the second high-pass filter 33 is mainly used for filtering out the frequency signals lower than the X-band, so that the spurious signals have no influence on the subsequent intermediate frequency signals.

The frequency conversion unit comprises a first mixer 34, a second mixer 35, a band-pass filter 36, a low-pass filter 37, an amplifier 38, a first single-pole double-throw switch 39, a second single-pole double-throw switch 40, a frequency multiplier 41, a third single-pole double-throw switch 42 and a miniaturized frequency source 43.

Further, the first mixer 34 in the frequency conversion unit is configured to mix the input K-Ka band signal to obtain a first intermediate frequency signal, and the band-pass filter 36, the frequency multiplier 41 and the miniaturized frequency source 43 are configured to provide a local oscillation signal for the first intermediate frequency signal; the second mixer 35 is used for mixing the input X-Ku band signal to obtain a second intermediate frequency signal, and the low pass filter 37, the amplifier 38 and the miniaturized frequency source 43 are used for providing a local oscillator signal to the second intermediate frequency signal.

The intermediate frequency unit comprises a first intermediate frequency band-pass filter 44, an intermediate frequency low-pass filter 45, a second intermediate frequency band-pass filter 46, an intermediate frequency single-pole double-throw switch 47, a third intermediate frequency band-pass filter 48, a first intermediate frequency amplifier 49, a first numerical control attenuator 50, a second intermediate frequency amplifier 51, an intermediate frequency temperature compensation attenuator 52 and a second intermediate frequency numerical control attenuator 53.

Further, the first intermediate frequency band-pass filter 44, the intermediate frequency low-pass filter 45, the second intermediate frequency band-pass filter 46 and the third intermediate frequency band-pass filter 48 in the intermediate frequency unit are used for filtering intermediate frequency signal spurious and harmonic waves; the first intermediate frequency amplifier 49 and the second intermediate frequency amplifier 51 are used for increasing the power of the intermediate frequency signal; the first numerical control attenuator 50 and the second numerical control attenuator 53 are used for adjusting the power flatness of the intermediate frequency output signal; the intermediate frequency temperature compensation attenuator 52 is used to reduce the difference in output signal power due to temperature variations.

All the radio frequency devices adopt micro-assembly structures, the assembly volume is small, and the integration level is high; those skilled in the art should know that the micro-assembly structure indicates that the radio frequency chips involved in the circuit are unpackaged chips, and the invention selects the chips, so that the structure size can be reduced, and the module has small volume and high integration level.

As a specific example, as shown in fig. 2, the miniaturized multimode variable frequency component of the X-Ka band further includes a shielding box body; the mode unit, the preselection unit, the frequency conversion unit and the intermediate frequency unit are distributed on the front surface of the box body shown in the figure 2 (a); the corresponding power and control parts are distributed on the back of the box body as shown in fig. 2 (b).

The invention will be further described with reference to the accompanying drawings and specific examples

Examples

Referring to fig. 1, the miniaturized multimode variable frequency component of the X-Ka band of this embodiment includes a mode unit, a preselection unit, a variable frequency unit, and an intermediate frequency unit. The external X-Ka wave band signals select different channels in the mode unit according to the power, the pre-selection unit filters and amplifies the input signals, the input signals enter the frequency conversion unit to mix out intermediate frequency signals, and finally the signals are filtered, amplified and attenuated in the intermediate frequency unit to output the required intermediate frequency signals.

The mode unit comprises a limiter, a first single-pole four-throw switch, a first attenuator, a first broadband low-noise amplifier, a second attenuator, a second broadband low-noise amplifier, a third attenuator, a fourth attenuator and a second single-pole four-throw switch.

The preselection unit comprises a first single-pole four-throw switch, a first band-pass filter, a first low-noise amplifier, a second band-pass filter, a third band-pass filter, a second low-noise amplifier, a fourth band-pass filter, a first attenuator, a second attenuator, a third attenuator, a second single-pole four-throw switch, a first high-pass filter, a first single-pole three-throw switch, a fifth band-pass filter, a third low-noise amplifier, a sixth band-pass filter, a seventh band-pass filter, a fourth low-noise amplifier, an eighth band-pass filter, a ninth band-pass filter, a fifth low-noise amplifier, a tenth band-pass filter, a second single-pole three-throw switch and a second high-pass filter.

The frequency conversion unit comprises a first mixer, a second mixer, a band-pass filter, a low-pass filter, an amplifier, a first single-pole double-throw switch, a second single-pole double-throw switch, a frequency multiplier, a third single-pole double-throw switch and a miniaturized frequency source.

The intermediate frequency unit comprises a first intermediate frequency band-pass filter, an intermediate frequency low-pass filter, a second intermediate frequency band-pass filter, an intermediate frequency single-pole double-throw switch, a third intermediate frequency band-pass filter, a first intermediate frequency amplifier, a first numerical control attenuator, a second intermediate frequency amplifier, an intermediate frequency temperature compensation attenuator and a second intermediate frequency numerical control attenuator.

The first attenuator on the low-distortion mode link in the mode unit is used for inputting a high-power signal, so that the high-power signal works in a linear region; the first broadband low-noise amplifier and the second broadband low-noise amplifier on the low-noise link are used for low-power signal input, so that the low-signal power works in a linear region; other power signals operate on the normal mode link.

The first band-pass filter, the first low-noise amplifier and the second band-pass filter in the preselection unit are used for filtering and amplifying an input K-band signal; the third band-pass filter, the second low-noise amplifier and the fourth band-pass filter are used for filtering and amplifying the input Ka-band signals; the fifth band-pass filter, the third low-noise amplifier and the sixth band-pass filter are used for filtering and amplifying the input Ku-band high-frequency signals; the seventh band-pass filter, the fourth low-noise amplifier and the eighth band-pass filter are used for filtering and amplifying the input Ku-band low-frequency signals; the ninth band-pass filter, the fifth low-noise amplifier and the tenth band-pass filter are used for filtering and amplifying the input X-band signals; the first high-pass filter is used for filtering out frequency signals lower than the K wave band; the second high pass filter is used for filtering the frequency signals lower than the X band. The band-pass and high-pass filters in the preselection unit are used for suppressing spurious signals, harmonic waves, intermediate frequency and image frequency of the input signals, so that the input signals are purer before entering the frequency mixing; the low noise amplifier in the preselection unit is used for amplifying the input signal power and reducing the noise coefficient of the component.

The first mixer in the frequency conversion unit is used for inputting K-Ka wave band signals to mix out first intermediate frequency signals, and the band-pass filter, the frequency multiplier and the miniaturized frequency source are used for providing pure local oscillation signals for the first intermediate frequency signals; the second mixer is used for inputting the X-Ku band signals to mix out second intermediate frequency signals, and the low-pass filter, the amplifier and the miniaturized frequency source are used for providing pure local oscillation signals for the second intermediate frequency signals.

The first intermediate frequency band-pass filter, the intermediate frequency low-pass filter, the second intermediate frequency band-pass filter and the third intermediate frequency band-pass filter in the intermediate frequency unit are used for filtering intermediate frequency signal spurious and harmonic waves; the first intermediate frequency amplifier and the second intermediate frequency amplifier are used for increasing the power of intermediate frequency signals; the first numerical control attenuator and the second numerical control attenuator are used for adjusting the power flatness of the intermediate frequency output signal; the intermediate frequency temperature compensation attenuator is used for compensating the difference of output signal power caused by temperature change.

In the X-Ka band miniaturized multimode variable frequency component shielding box body, a mode unit, a preselection unit, a variable frequency unit and an intermediate frequency unit are partially arranged on the front surface of the box body, and each unit and each link adopt a cavity-splitting design, so that signal crosstalk is effectively prevented; the related power supply and the control part are distributed on the back of the box body; the front mode unit, the preselection unit, the frequency conversion unit and the intermediate frequency unit of the box body are connected with the power supply and the control part on the back of the box body through the power supply insulator.

The X-Ka band miniaturized multimode variable frequency component of the embodiment adopts a micro-assembly structure in a radio frequency microwave part, and has small volume and high integration level; according to different input signal power, corresponding to three mode links, the dynamic range of the component is widened; the input frequency is amplified and filtered in a segmentation way before broadband frequency mixing; the noise coefficient (NF is less than or equal to 15 dB) of the component is obviously improved, and the device has larger intermediate frequency rejection (more than or equal to 80 dB) and image frequency rejection capability (more than or equal to 80 dB).

Taking the X-band as an example: the radio frequency signal is 8-12.5GHz, and the intermediate frequency signal is 3.52GHz; then a down conversion scheme is used, i.e., local oscillator signals 11.52-16.02GHz. The advantage of the frequency conversion scheme is that spurious signals generated by mixing the 2 times radio frequency signals and the local oscillation signals are approximately 1GHz away from the intermediate frequency signals; this allows the intermediate frequency filter sufficient frequency space to filter out these spurious signals. The image frequency is 15.04-19.54GH, which is sufficiently far from the rf signal to allow sufficient space for the preselected unit filter to filter out the image frequency. The invention can lead stray signals to deviate from main signals far and simplify link design through good frequency conversion relation, thus combining reasonable link selection and typesetting of devices, and leading components to have higher performance indexes under the state of smaller volume.

Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (9)

1. An X-Ka band miniaturized multimode variable frequency assembly comprising: the device comprises a mode unit, a preselection unit, a frequency conversion unit and an intermediate frequency unit; the external X-Ka wave band signals enter different mode channels of the mode unit according to the power, then enter a preselection unit after being processed by the mode unit, and enter corresponding amplifying and filtering channels according to different frequencies to carry out power amplification and spurious filtering; the signal output by the preselection unit outputs a corresponding intermediate frequency signal through frequency mixing in the frequency conversion unit, and the intermediate frequency signal output by the frequency conversion unit is amplified, filtered and attenuated by the intermediate frequency unit and then output.

2. The X-Ka band miniaturized multimode variable frequency assembly of claim 1 wherein the mode unit comprises: the low-distortion mode channel is used for inputting a high-power signal to enable the high-power signal to work linearly; the low-noise mode channel is used for inputting a low-power signal to enable the low-power signal to work linearly; the normal mode channel is used for inputting a medium power signal to make the medium power signal work linearly.

3. The X-Ka band miniaturized multimode variable frequency assembly of claim 2 wherein the high power frequency range is: (-10 dBm, +20 dBm), the frequency range of the medium power is (-50 dBm, -10 dBm), and the frequency range of the low power is (-100 dBm to-50 dBm).

4. A miniaturized multimode variable frequency assembly of the X-Ka band of claim 3 wherein the X-Ka band is divided into 5 frequency bands: the first frequency band is the X wave band: 8-12.5GHz; the second frequency band is Ku low band: 12.3-14.5GHz; the third frequency band is Ku high band: 14.3-18GHz; the fourth frequency band is K wave band: 18-26GHz; the fifth frequency band is Ka band: 26-32GHz.

5. The X-Ka band miniaturized multimode variable frequency assembly of claim 4 wherein the preselection unit comprises: the device comprises a K-band signal amplifying and filtering channel, a Ka-band signal amplifying and filtering channel, a Ku high-band signal amplifying and filtering channel, a Ku low-band signal amplifying and filtering channel and an X-band signal amplifying and filtering channel; the preselection unit selects corresponding amplifying and filtering channels for the signals output by the mode unit according to the frequency, and performs power amplification and spurious filtering.

6. The miniaturized multi-mode frequency conversion assembly of the X-Ka band of claim 5 wherein the pre-selection unit comprises a first single pole four throw switch, a second single pole four throw switch, a first single pole three throw switch, a second single pole three throw switch, a K band signal amplification and filtering channel, a Ka band signal amplification and filtering channel, a Ku high band signal amplification and filtering channel, a Ku low band signal amplification and filtering channel, an X band signal amplification and filtering channel, a first high pass filter, a second high pass filter;

the preselection unit is used for selecting and connecting a K-band signal amplification and filtering channel or a Ka-band signal amplification and filtering channel through the magnitude of control voltage of the first single-pole four-throw switch and the second single-pole four-throw switch, and closing the unselected amplification and filtering channels;

the preselection unit is used for switching on one channel of a Ku high-band signal amplification and filtering channel, a Ku low-band signal amplification and filtering channel and an X-band signal amplification and filtering channel through the magnitude of control voltage of the first single-pole four-throw switch, the first single-pole three-throw switch and the second single-pole three-throw switch, and closing the unselected amplification and filtering channels;

the fixed end of the second single-pole four-throw switch is connected with the first high-pass filter;

the fixed end of the second single-pole three-throw switch is connected with a second high-pass filter;

the K-band signal amplifying and filtering channel comprises a first band-pass filter, a first low-noise amplifier and a second band-pass filter which are sequentially connected;

the Ka-band signal amplifying and filtering channel comprises a third band-pass filter, a second low-noise amplifier and a fourth band-pass filter which are sequentially connected;

the Ku high-band signal amplifying and filtering channel comprises a fifth band-pass filter, a third low-noise amplifier and a sixth band-pass filter which are sequentially connected;

the Ku low-band signal amplifying and filtering channel comprises a seventh band-pass filter, a fourth low-noise amplifier and an eighth band-pass filter which are sequentially connected;

the X-band signal amplifying and filtering channel comprises a ninth band-pass filter, a fifth low-noise amplifier and a tenth band-pass filter which are sequentially connected.

7. The X-Ka band miniaturized multimode variable frequency assembly of claim 6 wherein the variation of the control voltage is controlled by a power supply and control board.

8. The miniaturized multimode variable frequency assembly of claim 7 wherein the free pin of the first single pole, four throw switch is coupled to the first attenuator and the free pin of the second single pole, four throw switch is coupled to the second attenuator and the third attenuator, respectively.

9. The miniaturized multimode variable frequency assembly of the X-Ka band of claim 8, further comprising a shielding box, wherein the mode unit, the preselection unit, the variable frequency unit and the intermediate frequency unit are arranged on the front surface of the shielding box, and each unit and each channel in each unit adopt a split cavity design; the power supply and the control board are distributed on the back surface of the shielding box body; the front mode unit, the preselection unit, the frequency conversion unit and the intermediate frequency unit of the shielding box body are connected with the power supply and the control part on the back of the shielding box body through the power supply insulator.