Dual-polarized air cavity microstrip antenna for satellite-borne ocean salinity detection

Abstract

The invention belongs to the technical field of antennas, and particularly relates to a dual-polarized air cavity microstrip antenna for satellite-borne ocean salinity detection, which sequentially comprises an array feed source, a feed power division network layer and an antenna backboard from top to bottom, wherein the array feed source comprises a first metal groove (1), a first rectangular radiation patch (3), a first feed probe (12), a second feed probe (13), a first partition plate (5), a second partition plate (6), a second metal groove (2), a second rectangular radiation patch (4), a third feed probe (14), a fourth feed probe (15), a fifth feed probe (30), a sixth feed probe (31), a seventh feed probe (32) and an eighth feed probe (33). The first rectangular radiation patch (3) is arranged in the first metal groove (1), the second rectangular radiation patch (4) is arranged in the second metal groove (2), and the first metal groove (1) and the second metal groove (2) are oppositely arranged.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a dual-polarized air cavity microstrip antenna for satellite-borne ocean salinity detection. Background technique [0002] The satellite-borne ocean salinity detection payload (salinometer for short) works in the L-band, therefore, the structural size of the existing salinometer antennas is relatively large. There are three launched satellites containing the salinity meter payload: [0003] 1. Soil moisture and seawater salinity Earth Observation Satellite (SMOS), the antenna applied to the salinity meter is a 69-element dual-polarization antenna array with an array spacing of 0.875 wavelengths. [0004] 2. For the Aquarius / SAC-D satellite, the antenna used in the salinity meter is a 2.5-meter reflector antenna, the feed source is three horn antennas, and the feed source size is greater than 1 wavelength. [0005] 3. The soil moisture active and passive observation...

AI Technical Summary

Problems solved by technology

However, when the antenna feeds are arranged on the focal line at a close distance (less than 0.65 wavelengths), the mutual coupling between the antennas is very serious, which will affect the consistency of the pattern of multiple feeds

In addition, the antenna lengths on the existing salinometer payloads are all greater than 0.65 wavelengths, which cannot be applied to the newly proposed spaceborne ocean salinity detection payload

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