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A Method for Determining Passive Intermodulation Quantity of Mesh 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-scale mesh reflector antenna cannot be obtained through calculation and analysis, and achieves broad market application prospects and improves Simulation accuracy, accurate solution effect

Active Publication Date: 2017-12-22
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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  • A Method for Determining Passive Intermodulation Quantity of Mesh Reflector Antenna
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  • A Method for Determining Passive Intermodulation Quantity of Mesh Reflector Antenna

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[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 equ...

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Abstract

The invention discloses a method for determining the passive intermodulation amount of a mesh reflector antenna. The steps are as follows: establishing an equivalent model of the mesh reflector antenna; respectively loading carrier signals to the equivalent model of the mesh reflector antenna to obtain the surface Current distribution; calculate the overlap voltage of the mesh reflector antenna equivalent solid surface antenna model; establish the passive intermodulation analysis model at the wire overlap, and obtain the intermodulation current of each order; select the ml space on the mesh reflector sampling points, and calculate the passive intermodulation quantities of the corresponding ml spatial coordinate sampling points on the equivalent solid surface antenna model. The invention solves the technical problem that the passive intermodulation amount of the electric large-scale mesh 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...

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Application Information

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Patent Type & Authority Patents(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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