Novel high-isolation common-frequency dual-polarization horn antenna

Abstract

The invention discloses a novel high-isolation common-frequency dual-polarization horn antenna which comprises a first feed port (1), a rectangular waveguide-round waveguide converter (2) and a round horn (5), wherein the first feed port (1) is formed by a rectangular waveguide; the first feed port (1) is connected with one end of the rectangular waveguide-round waveguide converter (2); the other end of the rectangular waveguide-round waveguide converter (2) is connected with the round horn (5); a second feed port (3) is arranged on the rectangular waveguide-round waveguide converter (2); and the second feed port (3) is formed by a rectangular waveguide and an impedance matching bolt (4). According to the invention, due to the adoption of a crossfield feed technology, the antenna can work in the common-frequency dual-polarization environment, and the isolation is superior to 50dB, the standing-wave ratio is less than 1.3:1, the gain is about 20dBi and the antenna efficiency is more than 65 percent.

Description

technical field [0001] The invention relates to a high-isolation co-frequency dual-polarized horn antenna, in particular to a novel high-isolation co-frequency dual-polarized horn, which belongs to the field of horn antennas. Background technique [0002] In modern meteorological detection, the detection of clouds is a research hotspot in current weather radar detection. Because the components in the cloud are relatively complex, there are water particles that are approximately spherical, and there are also ice particles with irregular shapes, so the cloud will produce reflected echoes with different polarizations for incident electromagnetic waves in a single polarization direction. In order to detect these reflected echoes, it is required that the same-frequency dual-polarization reception can be realized in the receiving antenna of the cloud radar, and the specific shape of the particles in the cloud can be retrieved by detecting the depolarization ratio. The same-freque...

AI Technical Summary

Problems solved by technology

In the past, dual-polarized antennas with the same frequency were implemented by patch antennas, etc., and the gain was low, so it is not suitable for cloud radar

Although shaped reflector antennas such as paraboloids have high gain, achieving dual polarization at the same frequency and achieving high isolation put forward high requirements for the feed source of this type of antenna, and it is difficult to realize

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