Thin Substrate Phase-Corrected Broadband Difference Beam Planar Horn Antenna

Abstract

The invention relates to a planar horn antenna with thin substrate phase correction broadband difference beam and relates to a horn antenna. The antenna includes a microstrip feeder (2), a horn antenna (3) and a logarithmic periodic oscillator (4) on a dielectric substrate (1). The horn antenna (3) consists of a first metal plane (7), a second metal plane (8) and two rows of metallized via hole horn sidewalls (9), there are odd number of metallized via hole arrays (11) and even number of dielectric filled waveguides (17) in the horn antenna (3), in the horn antenna (3 ) on the aperture surface (10) each dielectric filled waveguide (17) is connected with a logarithmic periodic oscillator (4), the left half antenna (15) and the connected logarithmic periodic oscillator (4) and the right half antenna (16) and The connected logarithmic periodic vibrator (4) is symmetrical. Electromagnetic waves can reach the logarithmic periodic oscillator in the same phase and then radiate, and the radiation field polarization is parallel to the substrate. The antenna can use a thin substrate with wide frequency band, high gain, large zero depth, low cost and compact 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 t...

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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