Thin substrate phase-position correcting broadband difference beam plane horn antenna

Abstract

The invention relates to a horn antenna, in particular to a thin substrate phase-position correcting broadband difference beam plane horn antenna. The antenna comprises a micro-strip feeder (2), a horn antenna body (3) and logarithm periodical vibrators (4), wherein the micro-strip feeder (2), the horn antenna body (3) and the logarithm periodical vibrators (4) are arranged on a dielectric substrate (1). The horn antenna body (3) is composed of a first metal plane (7), a second metal plane (8) and two rows of metallization through hole horn side walls (9). The odd number of metallization through hole arrays (11) and the even number of medium filling waveguides (17) are arranged in the horn antenna body (3), and each medium filling waveguide (17) on a caliber plane (10) of the horn antenna body (3) is connected with the corresponding logarithm periodical vibrator (4). A left half antenna (15) and the logarithm periodical vibrator (4) connected with the left half antenna (15) are symmetrical with a right half antenna (16) and the logarithm periodical vibrator (4) connected with the right half antenna respectively. An electromagnetic wave can reach the logarithm periodical vibrators in an in-phase mode to be radiated, and the radiation field polarization direction is parallel to the substrate. A thin substrate can be used in the antenna, and the antenna is wide in bandwidth, high in gain, large in zero depth, low in cost and compact in structure.

Description

technical field [0001] The invention relates to a horn antenna, in particular to a planar horn antenna with thin substrate phase correction broadband difference beam. Background technique [0002] Horn antennas are widely used in systems such as satellite communications, ground microwave links, and radio telescopes. However, the huge geometric size of the three-dimensional horn antenna restricts its application and development in planar circuits. In recent years, the proposal and development of substrate-integrated waveguide technology have greatly promoted the development of planar horn antennas. The substrate-integrated waveguide has the advantages of small size, light weight, easy integration and fabrication. The planar substrate-integrated waveguide horn antenna based on the planar substrate-integrated waveguide not only has the characteristics of the horn antenna, but also realizes the miniaturization and light weight of the horn antenna, and is easy to integrate in...

AI Technical Summary

Problems solved by technology

In addition, the gain of the traditional substrate-integrated waveguide planar horn antenna is relatively low. The reason is that due to the continuous opening of the horn mouth, the phase is out of sync when the electromagnetic wave propagates to the horn aperture surface, and the radiation directivity and gain are reduced. The zero depth of the difference beam antenna is shallow and the slope is low, which affects the direction finding accuracy of the radar

At present, methods such as dielectric loading and dielectric prisms have been used to correct the horn aperture field, but these phase alignment structures increase the overall structural size of the antenna

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