Multi-frequency-point interference sampling circuit and method for Ku/Ka dual-band satellite communication ground station

A sampling circuit, multi-frequency technology, applied in the field of satellite communication anti-jamming, can solve the problems of unsuitable non-cooperative interference signal sampling, large insertion loss, etc., to achieve the effect of convenient control and testing

Active Publication Date: 2021-12-21
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the device adopts the sampling method of direct wired radio frequency coupling, which requires the interference source to be known and the high frequency radio frequency sampling insertion loss is too large, so it is not suitable for the sampling of non-cooperative interference signals of Ka / Ku frequency band space radiation

Method used

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  • Multi-frequency-point interference sampling circuit and method for Ku/Ka dual-band satellite communication ground station
  • Multi-frequency-point interference sampling circuit and method for Ku/Ka dual-band satellite communication ground station
  • Multi-frequency-point interference sampling circuit and method for Ku/Ka dual-band satellite communication ground station

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Experimental program
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Effect test

Embodiment 1

[0044] see Figures 1 to 3 As shown, Embodiment 1 provides a multi-frequency point interference sampling circuit for Ku / Ka dual-band satellite communication ground stations, which includes several sampling frequency conversion units, reference generation units, switching matrix units and signal control units.

[0045] The sampling frequency conversion unit is composed of an interference sampling antenna and a down conversion module, including M Ka frequency band sampling frequency conversion units, N Ku frequency band sampling frequency conversion units, a satellite communication antenna Ka frequency band down conversion module and a satellite communication antenna Ku frequency band Down conversion module. The output end of the Ka-band sampling frequency conversion unit is electrically connected to the first group of input ends of the reference generation unit through a coaxial cable, and the output end of the Ku-band sampling frequency conversion unit is electrically connecte...

Embodiment 2

[0060] Due to the certain radiation power near the satellite antenna, it is not suitable for personnel to operate at close range for a long time. Existing interference sampling circuits have communication interfaces, but do not necessarily have the remote control functions of polarization selection, clock switching and link switching. The remote display and control unit is interconnected with the control terminal of the signal control unit, the sampling frequency conversion unit, the reference generation unit and the switching matrix unit through the communication terminal, which can realize the discrete single frequency of multi-channel Ku and Ka frequency bands. Point signal control, processing and status monitoring.

[0061] Therefore, see Figure 4 As shown, the difference between Embodiment 2 and Embodiment 1 is mainly that a remote display and control unit containing a remote system management microprocessor is added to the system to realize the multi-frequency point in...

Embodiment 3

[0067] Although, the use of a wide-beam sampling antenna can effectively guarantee the continuous collection of interference signals from all directions, and reasonable adjustment of antenna polarization according to business needs can support the sampling of interference signals in different polarization forms. However, in the swaying working environment, the satellite communication ground station usually uses a servo platform to ensure the stability of the antenna satellite locking state. The swaying of the sampling antenna beam with the swaying environment is not conducive to the sampling of interference signals. When considering the platform swaying problem, a servo platform can be set on the frequency conversion sampling unit.

[0068] Therefore, the difference between the third embodiment and the second embodiment is mainly that a servo platform is set on the sampling frequency conversion unit or the sampling antenna to obtain larger applicable scenarios.

[0069] Specifi...

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Abstract

The invention provides a multi-frequency-point interference sampling circuit and method for a Ku / Ka dual-band satellite communication ground station. The interference sampling circuit comprises a sampling frequency conversion unit, a reference generation unit, a switching matrix unit, a signal control unit and a remote display control unit. The method comprises the steps: sampling spatial interference signals by controlling a Ku and Ka frequency band sampling antenna array, and converting the spatial interference signals into sampling signals; performing down-conversion processing on the sampling signal to obtain an intermediate frequency interference signal; selecting discrete frequency point signals of each channel by using a multi-channel signal switching matrix; and enabling the signal control unit to carry out satellite communication intermediate frequency signal receiving and multichannel interference signal processing and state control. By adopting a multi-input multi-output switching scheme and a multi-frequency-point feed clock scheme, when the existing Ku and Ka dual-band satellite communication ground station is interfered, the multi-frequency-point multi-channel interference signal synchronous receiving, sampling and processing capabilities in the Ku and Ka dual bands can be provided.

Description

technical field [0001] The invention relates to the technical field of satellite communication anti-interference, in particular to a multi-frequency point interference sampling circuit and method for Ku / Ka dual-band satellite communication ground stations. Background technique [0002] With the advancement of low-cost satellite launch technology, there are more and more users of vehicle-mounted, ship-borne and fixed Ku and Ka dual-band satellite ground stations. Satellite communication ground stations usually use Ku and Ka dual-band integrated satellite communication antennas to receive downlink signals at multiple frequency points. The main feature is that although the main lobe gain of satellite communication antennas is high, the level of satellite downlink signals reaching the ground is low. Weak, and for the side lobe of the satellite antenna, it still has a high side lobe, so the non-cooperative interference in the same frequency band space emitted by other ground term...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/19H04B7/155
CPCH04B7/19H04B7/15585
Inventor 李斌孟进何方敏王青罗康杨凯肖诗靖刘宏波
Owner NAVAL UNIV OF ENG PLA
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