Double-frequency broadband ripple horn feed antenna

Abstract

The invention, which relates to the communication technology field, more particularly discloses a double-frequency broadband ripple horn feed antenna that comprises an input circular waveguide, a variable module section, and a radiant section. The input circular waveguide is connected to the variable module section that is connected to the radiant section. Besides, the antenna is characterized in that: the input circular waveguide is an over mode transmission waveguide; the variable module section and the radiant section are in a circular waveguide ripple structure; the variable module section is formed by a plurality of single groove deep transfer period ripple structures and the inner wall is in a gradually expanded horn shape; calibers of all the ripple structures are different; and the radiant section is formed by a plurality of periodical ripple structures, wherein calibers of periodical ripple structures are gradually expanded in a linear mode; and a gradually expanded angle of the inner wall of the radiant section is greater than that of the variable module section. According to the invention, the antenna has a simple and compact structure; and antenna technical indexes including equalization of dual-band E surface and H surface directional diagrams, a dual-band edge illumination level, broadband multi-mode transmission, and dual-band phase center sharing and the like are realized; besides, the antenna has advantages of compact structure, small volume, light weight, low cost, easy processing, high efficiency and good environmental adaptability and the like.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a dual-frequency broadband corrugated horn feed antenna. Background technique [0002] The dual-frequency broadband corrugated horn feed has the advantages of good pattern equalization, low cross-polarization level, and good dual-frequency matching characteristics. It has very broad applications in communication, radar, guidance, telemetry, remote sensing, astronomy, and television broadcasting. application prospects. In order to improve the efficiency of the reflector antenna, it is necessary to require the feed antenna to have E-plane and H-plane pattern equalization, and the cross-polarization level is lower than -30dB. Therefore, it is important to develop a dual-band broadband corrugated horn feed. Practical significance. [0003] At present, there are generally two ways to realize dual-frequency broadband corrugated horn feeds: Gaussian shaped light-wall horn anten...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the general dual-band feed cannot transmit the high-order mode (TE) for self-tracking 21 Mode), high and low frequency phase centers do not coincide, complex structure, high processing precision requirements, etc., the present invention provides a dual-band broadband corrugated horn feed antenna, which can realize dual-band E-plane and H-plane pattern equalization, dual-band edge Irradiation level, broadband multi-mode transmission, dual-band co-phase center and other technical indicators

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