Planar horn antenna for phase calibration

Abstract

The invention relates to a planar horn antenna, in particular to a planar horn antenna for phase calibration. The antenna comprises a micro-strip feeder (1), a substrate integrated waveguide horn antenna (2) and a plurality of embedded plated-through holes (3) which are integrated on a dielectric substrate (4), the horn antenna (2) is composed of a first metal plane (8), a second metal plane (10) and two rows of plated-through hole horn side walls (11), the plated-through holes (3) are disposed in the horn antenna (2) and form a column or multiple columns of through hole linear arrays (12), each two adjacent columns of linear arrays (12) or one column of linear arrays (12), one row of horn side walls (11), the first metal plane (8) and the second metal plane (10) form a dielectric-filled waveguide (13), and one end of each dielectric-filled waveguide (13) is disposed in the horn antenna (2) while the other end thereof is disposed on an antenna aperture surface (14). In addition, the antenna is capable of increasing antenna gain.

Description

technical field [0001] The invention relates to a planar horn antenna, in particular to a phase-aligned planar horn antenna. 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. In addition to the characteristics of the horn antenna, the planar substrate-integrated waveguide horn antenna based on the planar substrate-integrated waveguide also realizes the miniaturization and light weight of the horn antenna, and is easy to integrate in the microwave and millimeter-wave planar circ...

AI Technical Summary

Problems solved by technology

In addition to the characteristics of the horn antenna, the planar substrate-integrated waveguide horn antenna based on the planar substrate-integrated waveguide also realizes the miniaturization and light weight of the horn antenna, and is easy to integrate in the microwave and millimeter-wave planar circuits. 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 of the electromagnetic wave propagating to the horn aperture surface is not synchronized, the phase distribution of the aperture electric field intensity is not uniform, and the radiation direction sex and gain reduction

At present, methods such as dielectric loading and dielectric prism have been used to correct the horn aperture field, but these methods are all achieved by adding a phase or electric field calibration structure outside the planar horn, which increases the overall structural size of the antenna.

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