Variable polarization panel antenna unit

Abstract

The invention relates to a variable polarization panel antenna unit, which is formed by slot coupling a plurality of metal layers from top to bottom; the topmost metal layer from top to bottom is a radiation patch printed layer, and the surface of the printed layer is printed with a radiation patch; the second layer is an etched coupling slot; the third layer is a microstrip line feeder network layer which is provided with a strip line feeder network thereon; and the forth layer is a grounding plate, and the forth layer and the second and third layers form a strip line transmission line. The U-shaped slot provided by the invention uses a vertical part arm length as a moderating variable, and an impedance deploying range is expanded obviously; a double-port feed structure is adopted, when the antenna works in a circular polarization mode, the TM10 and TM01 degeneracy mode field distribution has very good symmetry, and the circular polarization orthogonal isolation is high; and a strip line feed network structure is adopted, thereby not only effectively reducing spurious radiation and back reflection, but not increasing the profile thickness of the panel antenna excessively.

Description

technical field [0001] The invention relates to a flat panel antenna, in particular to a broadband, variable polarization slot coupled multilayer panel antenna. Background technique [0002] In the measures to improve the performance of flat panel antennas, various indicators often restrict each other. For example, the use of high dielectric constant dielectric substrates is one of the direct and efficient means of antenna miniaturization. However, ε r The increase of will lead to the increase of the antenna radiation Q value and the narrowing of the frequency band. Therefore, when designing an antenna, it is necessary to weigh the requirements of various indicators and carefully select the substrate material, antenna structure, patch shape, and feeding method. Contents of the invention [0003] The technical problem to be solved by the invention is to propose a novel broadband, variable polarization slot coupled multi-layer planar antenna unit. [0004] The technical so...

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Problems solved by technology

[0002] In the measures to improve the performance of flat panel antennas, various indicators often restrict each other. For example, the use of high dielectric constant dielectric substrates is one of the direct and efficient means of antenna miniaturization. However, ε r The increase will lead to the increase of the antenna radiation Q value and the narrowing of the frequency band

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