Microstrip antenna using parasitical feed metal columns

A technology of parasitic feeding and microstrip antenna, which is applied in the direction of antenna, antenna grounding device, antenna grounding switch structure connection, etc., which can solve the problem of poor rotational symmetry of radiation pattern, failure to meet the requirements of hemispherical space coverage, and insufficient feed position. Balance and other issues, to achieve the effect of improving rotational symmetry, improving circular polarization performance, and flexible position
CN104112903AActive Publication Date: 2014-10-22XIAN INSTITUE OF SPACE RADIO TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XIAN INSTITUE OF SPACE RADIO TECH
Publication Date
2014-10-22

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Abstract

A microstrip antenna using parasitical feed metal columns. The microstrip antenna includes four layers of dielectric plates, a radiating patch, metal floors, an SMP RF connector, a one-to-two power divider of a strip line form, a first feed metal column, a second feed metal column, a first parasitical feed metal column, and a second parasitical feed metal column. The antenna is additionally provided with the parasitical feed metal columns on the basis of a double-feed point circular polarization microstrip antenna, through electromagnetic coupling induction, the parasitical feed metal columns have electromagnetic field energy of a certain amplitude and phase, thereby changing surface current distribution of the microstrip antenna and electromagnetic field distribution between the microstrip antenna and the floors, so as to obtain a radiation pattern in rotational symmetry approximate to a ''four-feed point'' microstrip antenna, and at the same time, low elevation gain is improved, a feed network is simplified, feed loss is reduced, and the envelope size is diminished. The microstrip antenna using the parasitical feed metal columns in the invention is particularly suitable for occasions which have high requirements for miniaturization, rotational symmetry of a pattern and low elevation gain, and has popularization and application value.
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Description

technical field

[0001] The invention belongs to the technical field of antennas, and relates to a microstrip antenna using a parasitic feed post, and is particularly suitable for circularly polarized antennas with small envelope size, hemispherical space coverage, and high requirements for rotational symmetry of the radiation pattern. Background technique

[0002] In the fields of satellite navigation, satellite positioning receiving system, aviation vehicle communication (low code rate), etc., it is often required to use circularly polarized antenna units with wider beams (for example, hemispherical space coverage), in order to improve low elevation gain or meet attitude changes Requirements, but also hope that the radiation pattern rotation symmetry is better. As platforms get smaller, the envelope size of such antennas needs to get smaller and smaller.

[0003] At present, the commonly used spaceborne navigation antennas and spaceborne positioning receiving antennas are ...

Claims

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