Thin Substrate Phase Amplitude Correction Slot Line Difference Beam Planar Horn Antenna

Abstract

The invention relates to a planar horn antenna with a thin substrate phase amplitude correction groove line difference beam and relates to a horn antenna. The antenna includes a microstrip feeder (2), a horn antenna (3) and a slot line horn (4) on a dielectric substrate (1), and 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 an odd number of metallized via-hole arrays (11) and an even number of dielectric-filled waveguides (15) in the horn antenna (3), and the horn antenna (3) The width of each dielectric-filled waveguide (15) on the aperture surface (10) is equal and is connected with a slot line horn (4), the left half antenna (13) and the connected slot line horn (4) and the right half antenna (14 ) and the connected slot line horn (4) are symmetrical. Electromagnetic waves can reach the slot line horn with equal amplitude and same phase to radiate again, and the radiation field polarization is parallel to the substrate. The antenna can use a thin substrate with 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 amplitude correction groove line 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 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 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. The radiation directivity and gain are reduced, making the zero depth of the formed differential beam antenna shallower and the slope lower, 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 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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