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Method for determining passive-intermodulation quantity of net-shaped reflecting surface antenna

A technology of passive intermodulation and reflective surfaces, applied to antennas, electrical components, etc., can solve problems such as limiting reliability and passive intermodulation, and achieve the effects of simplifying calculations, ensuring calculation accuracy, and filling technical gaps

Active Publication Date: 2015-08-19
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

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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  • Method for determining passive-intermodulation quantity of net-shaped reflecting surface antenna
  • Method for determining passive-intermodulation quantity of net-shaped reflecting surface antenna
  • Method for determining passive-intermodulation quantity of net-shaped reflecting surface 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 passive-intermodulation quantity of a net-shaped reflecting surface antenna, and belongs to the technical field of space special effects of satellite-borne microwave components. The method makes time-domain calculation of an electrically-large-size net-shaped reflecting surface antenna possible through simplified calculation of an established equivalent mesh model of an actual net-shaped reflecting surface antenna, ensures calculation accuracy, combines a passive-intermodulation analysis method of a non-linear circuit model, obtains generated passive-intermodulation output quantity of each order through one-time simulation when different frequencies are input, eliminates the annihilation effect on signals with small passive-intermodulation quantity due to the input of large signals through an ideal circuit model, eliminates the annihilation effect on signals with small passive-intermodulation quantity caused by accumulated error in time-domain analysis, successfully solves the difficulties of accurate electromagnetic field distribution calculation and passive-intermodulation analysis of the electrically-large-size net-shaped reflecting surface antenna, fills the blank of net-shaped reflecting surface antenna passive-intermodulation analysis technology, and has broad technology market and application prospect.

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 Applications(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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