Method for determining passive intermodulation amount of net-shaped reflector antenna

A technology of passive intermodulation and determination method, which is applied to antennas, electrical components, etc., can solve the problem that the passive intermodulation value of large-size mesh reflector antenna cannot be obtained through calculation and analysis, and achieves broad market application prospects and calculation. Accurate precision and enhanced versatility

Active Publication Date: 2015-11-18
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0007] The technical solution of the present invention is to overcome the deficiencies of the prior art and provide a method for determining the passive intermodulation amount of the mesh reflector antenna. The present invention solves the problem that the passive intermodulation amount of the mesh reflector antenna cannot Technical Difficulties Obtained Through Computational Analysis

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  • Method for determining passive intermodulation amount of net-shaped reflector antenna
  • Method for determining passive intermodulation amount of net-shaped reflector antenna
  • Method for determining passive intermodulation amount of net-shaped reflector antenna

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Embodiment Construction

[0037] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] A method for determining the passive intermodulation amount of a mesh reflector antenna according to the present invention comprises the following steps:

[0039] (1) Establish the equivalent model of the mesh reflector antenna: as figure 1 As shown, according to the actual physical structure of the mesh reflector antenna, the mesh structure reflector overlapped by metal wires is equivalent to an all-metal filled reflector, that is, the equivalent solid surface antenna model of the mesh reflector antenna is established, and according to the mesh The actual feed structure of the reflector antenna establishes the feed source model of the equivalent solid surface antenna model, and establishes the equivalent model of the mesh reflector antenna according to the equivalent solid surface antenna model and the feed source model; the equi...

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Abstract

The invention discloses a method for determining passive intermodulation amount of a net-shaped reflector antenna. The method comprises the steps of: establishing a net-shaped reflector antenna equivalent model; loading carrier signals on the net-shaped reflector antenna equivalent model to obtain surface current distribution; calculating a lap joint voltage of a net-shaped reflector antenna equivalent solid surface antenna model; establishing a passive intermodulation analysis model at a lap joint of metal wires, and acquiring various-oder intermodulation currents; and selecting m1 spatial sampling points on a net-shaped reflecting surface, and calculating passive intermodulation amount of corresponding m1 spatial coordinate sampling points on the equivalent solid surface antenna model. The method disclosed by the invention solves the technical difficult that passive intermodulation amount of large-size net-shaped reflector antenna cannot be obtained through calculation and analysis.

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 field of satellite-borne microwave technology. Background technique [0002] (1) With the development of 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. [0003] The applicant used a variety of search str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/18H01Q19/10
Inventor 李韵白鹤崔万照
Owner XIAN INSTITUE OF SPACE RADIO TECH
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