Ultra-wide-band horn antenna

Abstract

The invention provides an ultra-wide-band horn antenna comprising a mode conversion feedback cavity part, a coaxial line excitation part, and a double-ridged horn part. The mode conversion feedback cavity part includes a feedback cavity, a short-circuit board, a cross bump, a wedge, a slope, an upper ridge, and a lower ridge. Through a metal sleeve, the short-circuit board, the slope, the wedge, a horn narrow side wall and other structures, the antenna has low voltage standing wave ratio and good radiation pattern. In the whole working frequency band of the antenna, the standing wave of the antenna is effectively reduced, and the gain of the antenna is improved. The horn narrow side wall is composed of a position-adjustable metal gate, so that the horn antenna has good low-frequency characteristic, the high-frequency radiation pattern is not deteriorated, and satisfactory impedance matching and radiation characteristics are obtained in the wide band from 0.8GHZ to 20GHZ. The ultra-wide-band horn antenna has the advantages of large power capacity, wide frequency band, high gain, and good directivity.

Description

technical field [0001] The invention relates to a novel ultra-wideband horn antenna with improved standing wave ratio and high-frequency radiation characteristics, which can be applied to electromagnetic compatibility detection, microwave testing, radar communication systems and the like. Background technique [0002] UWB antenna technology is a research hotspot at home and abroad. It originated in the field of military radar earlier, and has proved its excellence in advanced military technologies such as radar detection, anti-stealth technology, and electronic countermeasures. In recent years, ultra-wideband technology has been gradually introduced into the civilian field. Ultra-wideband radars in military and civilian fields and ultra-wideband antennas for communication systems have attracted much attention. A large number of applications have been obtained in the field of transient electromagnetic fields. However, the existing broadband horn antennas do not use adjustab...

AI Technical Summary

Problems solved by technology

However, the existing broadband horn antennas do not use adjustable metal grid sidewalls, either a fixed metal sidewall or a closed metal sidewall

When conducting microwave testing or microwave applications, it is not possible to have good VSWR and radiation patterns in all frequency bands at the same time; the design of the impedance matching part of the rear feed cavity is not perfect, and it cannot effectively suppress the radiation of backward electromagnetic waves and reduce the VSWR. wave, increase the gain of the horn antenna

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