A circularly polarized waveguide slot antenna and its design method
A circularly polarized wave and slot antenna technology, applied in leaky waveguide antennas, circuits, etc., can solve problems such as narrow working bandwidth, beam pointing dispersion, and failure to meet the needs of radar and communication systems, and achieve simple structure and high work efficiency. Effect
Active Publication Date: 2017-05-31
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology
[0010] The object of the present invention is to provide a circularly polarized waveguide slot antenna with good broadband characteristics, simple structure, and a large planar array and its design method, so as to solve the problem of antennas in the prior art. Either there is beam pointing dispersion; or the structure is complex and the working bandwidth is narrow; or affected by engineering, it is not suitable to work in the high frequency band and cannot meet the needs of the growing radar and communication systems
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] Based on the antenna in the prior art, it either works for linear polarization; or there is beam pointing dispersion; or the structure is complex and the working bandwidth is narrow; or it is affected by engineering and is not suitable for working in the high frequency band, which cannot meet the growing communication and radar. For the problem of system requirements, an embodiment of the present invention provides a circularly polarized waveguide slot a...
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The invention discloses a circular polarization waveguide slot antenna and a design method of the circular polarization waveguide slot antenna. The antenna comprises a hollow metal waveguide pipe with the cross section shaped like a Chinese character 'tu', the convex part is defined as a boss, and the retracting parts on the two sides of the boss are shoulder arms. One end of the metal waveguide pipe is an input port of the antenna, and the other end is provided with a closed short circuit or connected with a matched load. The boss is provided with multiple straight slots in the extending direction of the metal waveguide pipe, and each straight slot is parallel with the extending direction of the metal waveguide pipe and is in a straight line shape. Each shoulder arm is provided with multiple pairs of inclined slot sets in the extending direction of the metal waveguide pipe, each pair of inclined slot set comprises splayed inclined slots, and each pair of inclined slot set is outwards diverged from the lateral wall of the boss and inclines towards the boss. The circular polarization waveguide slot antenna has a good wideband feature, is simple in structure, and can conveniently and independently form a large planar array. The invention further discloses the design method of the circular polarization waveguide slot antenna.
Description
technical field [0001] The invention relates to an antenna, in particular to a circularly polarized waveguide slot antenna and a design method thereof. Background technique [0002] In recent years, with the wide application of satellite communication, the antenna system for receiving satellite broadcast communication has been developed rapidly. For example, for direct broadcast satellite (DBS) communication systems, low-profile, high-efficiency antenna systems are required to increase the G / T value of the system (G is the gain of the antenna system; T is the noise temperature of the antenna system) to increase the antenna and Data rate for satellite communications. Moreover, the effective aperture of the antenna is limited by the scanning volume of the antenna. For a given scanning volume, the low-profile antenna can obtain the maximum system gain, thereby improving the G / T value of the entire system. [0003] Due to its high efficiency, easy amplitude and phase control, ...
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IPC IPC(8): H01Q13/22
Inventor 张洪涛汪伟金谋平邹永庆孙立春
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST