Amplitude-calibrated SIW (substrate integrated waveguide) antenna with embedded pated through holes

Abstract

The invention relates to a planar horn antenna, in particular to an amplitude-calibrated SIW (substrate integrated waveguide) antenna with embedded pated through holes. The antenna comprises a microstrip feeder (1), an SIW horn antenna (2) and embedded plated through holes (3), wherein the microstrip feeder (1), the SIW horn antenna (2) and the plated through holes (3) are integrated on a dielectric substrate (4). The microstrip feeder (1) is connected with an antenna port (5) and a horn antenna narrow port (6). The horn antenna (2) is composed of a first metal plane (8), a second metal plane (10) and sidewalls (11) of two rows of the plated through holes. The plated through holes (3) form a middle plated through hole array (12), a left plated through hole array (16) and a right plated through hole array (17). Four dielectric loaded waveguides are formed in the horn antenna (2). One end of each dielectric loaded waveguide faces to the horn antenna narrow port (6), and the other end of each dielectric loaded waveguide is close to an antenna aperture surface (15). Aperture efficiency of the amplitude-calibrated SIW (substrate integrated waveguide) antenna with embedded pated through holes can be improved.

Description

technical field [0001] The invention relates to a planar horn antenna, in particular to a substrate integrated waveguide antenna embedded with metallized via holes for amplitude calibration. Background technique [0002] Horn antennas are widely used in systems such as satellite communications, ground microwave links, and radio telescopes. However, the larger geometric size of the three-dimensional horn antenna and the incompatibility with the planar circuit process make its cost higher, thus limiting the development of its application. 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 planar integration and simple processing. In addition to the characteristics of the horn antenna, the planar substrate-integrated waveguide horn antenna based on the planar substrate-integrated waveguid...

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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. One of the important reasons is that the amplitude of the electromagnetic field on the horn aperture surface is very uneven, and the center is large and the two sides are small, which affects the aperture efficiency and radiation performance of the antenna.

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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