Thin-substrate phase amplitude correction slot line plane horn antenna

Abstract

The invention relates to a horn antenna, in particular to a thin-substrate phase amplitude correction slot line plane horn antenna which comprises a micro-strip feeder line (2), a horn antenna body (3) and a plurality of slot line horns (4), and the micro-strip feeder line (2), the horn antenna body (3) and the slot line horns (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 metalized via hole horn side walls (9), metalized via hole arrays (11) and dielectric-loaded waveguides (12) are arranged in the horn antenna body (3), the dielectric-loaded waveguides (12) are the same in width on the caliber face (10) of the horn antenna body (3), and one slot line horn (4) is connected to each dielectric-loaded waveguide (12). Electromagnetic waves can reach the slot line horns for radiation in equal-amplitude and in-phase modes, and polarization of a radiation field is parallel with the substrate. The antenna can be made through a thin substrate, and is high in gain, low in cost and compact in structure.

Description

technical field [0001] The invention relates to a horn antenna, in particular to a thin substrate phase amplitude correction slot line 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. 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 the microw...

AI Technical Summary

Problems solved by technology

Some existing antennas load a patch in front of the planar horn antenna to improve the radiation of the thin substrate planar horn antenna, but the size of the loaded patch is large and the working frequency band is narrow

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 not synchronized when the electromagnetic wave propagates to the horn aperture surface, and the amplitude distribution of the aperture electric field intensity is not uniform. Radiation directivity and gain reduction

At present, methods such as dielectric loading and dielectric prisms have been used to correct the horn aperture field, but these methods can only improve the consistency of the phase distribution, but cannot improve the uniformity of the amplitude distribution, and these phase calibration structures increase the overall structural size of the antenna

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