Slow-wave substrate integrated waveguide H-surface horn antenna for millimeter wave communication system

Abstract

The invention belongs to the technical field of horn antennas. The invention discloses a slow-wave substrate integrated waveguide H-plane horn antenna for a millimeter wave communication system. The slow-wave substrate integrated waveguide H-plane horn antenna is composed of a coplanar waveguide-substrate integrated waveguide transition, a substrate integrated waveguide transmission line, a substrate integrated waveguide horn opening angle structure, a slow-wave structure and an impedance matching structure which are integrated on a first dielectric substrate and a second dielectric substrate.The slow wave structure is composed of a metallized through hole array penetrating through the second dielectric substrate. The slow wave structure reduces the phase velocity of electromagnetic wavesaround the central axis of the wide wall of a horn, reduces the phase difference of the electromagnetic waves at the center and the edge of the caliber of the horn, and can reduce the longitudinal length of the horn on the premise that the caliber of the horn is not changed, the gain is not changed or even higher.

Description

technical field [0001] The invention belongs to the technical field of horn antennas, and in particular relates to a slow-wave substrate integrated waveguide H-plane horn antenna for a millimeter wave communication system. Background technique [0002] At present, the closest existing technology: the horn antenna is widely used in radar, remote sensing, satellite communication, radio astronomy and other fields due to its simple structure, high gain, large power capacity, and simple processing. However, traditional metal horn antennas are bulky and heavy, making them difficult to integrate with planar circuits. The substrate-integrated waveguide proposed in recent years has the advantages of small size, low cost, light weight, easy processing and integration. The horn antenna based on the substrate-integrated waveguide design not only has the advantages of traditional metal horn antennas, but also has the advantages of miniaturization, easy Advantages of integration. The de...

AI Technical Summary

Problems solved by technology

However, the longitudinal length of the optimal horn antenna is usually longer. In order to solve this problem, the method generally adopted in the industry is to directly increase the horn opening angle under the premise of keeping the aperture size fixed, but this will increase the distance from the horn phase center to the aperture. The wave path difference between the center and the edge of the aperture makes the phase distribution of the horn aperture surface more uneven, and the aperture efficiency and gain will be reduced

At present, the existing technology is to load the lens in front of the horn aperture to correct the field phase distribution of the horn aperture, increase the gain of the horn after shortening the longitudinal length of the horn, but increase the overall structural size of the antenna, and the increase of the antenna size will reduce the distance between the antenna and the system. The degree of integration does not conform to the trend of system miniaturization and integration

[0003] In summary, the existing problems in the prior art are: in the prior art, a lens is loaded in front of the horn aperture to correct the field phase distribution of the horn aperture, and the gain of the horn is increased after shortening the longitudinal length of the horn, which will increase the overall structural size of the antenna

In order to realize the miniaturization of the horn and improve the integration of the system, it is necessary to reduce the longitudinal dimension of the horn, but the effect of reducing the longitudinal dimension is to reduce the gain of the antenna

A horn-aperture front-loading lens would solve this problem, but would increase the overall size of the antenna

Therefore, the difficulty in solving the above technical problems lies in reducing the longitudinal length of the horn under the premise of ensuring that the gain of the horn antenna remains unchanged or even better without adding additional lenses in front of the aperture.

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