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A Method for Determining Passive Intermodulation Quantity of Mesh Reflector Antenna

A technology of passive intermodulation and reflective surfaces, applied in antennas, electrical components, etc., can solve problems such as passive intermodulation and limited reliability, and achieve the goals of simplifying calculations, ensuring calculation accuracy, and broadening the technical market and application prospects. Effect

Active Publication Date: 2017-10-24
XIAN INSTITUE OF SPACE RADIO TECH
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  • Description
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Problems solved by technology

However, for high-power transmitting and receiving shared antennas, passive intermodulation problems are extremely prone to occur, which has become a basic technical problem that limits its reliability.

Method used

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  • A Method for Determining Passive Intermodulation Quantity of Mesh Reflector Antenna
  • A Method for Determining Passive Intermodulation Quantity of Mesh Reflector Antenna
  • A Method for Determining Passive Intermodulation Quantity of Mesh Reflector Antenna

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Embodiment

[0030] A method for determining the passive intermodulation amount of a mesh reflector antenna, comprising the following steps:

[0031] (1) if figure 2 As shown, according to the actual physical structure of the mesh reflector antenna, the periodic equivalent model based on the holes on the mesh reflector antenna is established, and the mesh size of the equivalent model is determined ( figure 1 Mesh side length L) shown in is the actual mesh size (side length) of the mesh reflector antenna, and the width a of the equivalent model metal strip is determined to be the actual wire diameter of the mesh reflector antenna,

[0032] (2) if image 3 As shown, the feed model based on the mesh equivalent model is established according to the actual feed structure of the mesh reflector antenna, and the distance and inclination angle from the feed model to the mesh equivalent model are the same as The distance is equal to the inclination,

[0033] (3) if Figure 4 As shown, according...

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Abstract

The invention relates to a method for determining the passive intermodulation amount of a mesh reflector antenna, and belongs to the technical field of space special effects of space-borne microwave components. The present invention simplifies the calculation by establishing an equivalent mesh model of the actual mesh reflector antenna, making the time-domain calculation of the electric large-scale mesh reflector antenna possible, and at the same time ensuring the calculation accuracy, combined with the passive model of the nonlinear circuit model Intermodulation analysis method, through a simulation to obtain the passive intermodulation output of each order when different frequencies are input, eliminate the annihilation effect of the input large signal on the passive intermodulation small signal through the ideal circuit model, and eliminate the time domain analysis The annihilation effect of accumulated errors on small passive intermodulation signals has successfully solved the problem of accurate electromagnetic field distribution calculation and passive intermodulation analysis of large-scale mesh reflector antennas, and filled the gap in the passive intermodulation analysis of mesh reflector antennas. Technology blank, with broad technology market and application prospects.

Description

technical field [0001] The invention relates to a method for determining the passive intermodulation amount of a mesh reflector antenna, and belongs to the technical field of space special effects of space-borne microwave components. Background technique [0002] With the development of the next-generation transceiver sharing communication satellite technology, higher transmission power and more channels have become an inevitable development trend. For high-power transceiver shared antennas, passive intermodulation problems are extremely prone to occur, which has become a basic technical problem that limits its reliability. Passive-Intermodulation (PIM) refers to the combination of carrier frequency due to the mutual modulation of carrier signals caused by the nonlinearity of microwave passive components when two or more carriers are input under high power conditions. A phenomenon in which products fall into the receive passband and cause interference. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/14H01Q19/10
Inventor 李韵崔万照王新波李军胡天存王瑞张娜白鹤
Owner XIAN INSTITUE OF SPACE RADIO TECH
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