Polarization reconfigurable microstrip patch antenna system based on ferrite substrate

By using a polarization-reconfigurable microstrip patch antenna system based on a ferrite substrate, the polarization mode can be changed by generating a synthetic magnetic field using an electromagnetic coil. This solves the problem of fixed polarization direction in existing microstrip patch antennas, achieving low power consumption and high-precision polarization switching, and improving communication quality and anti-interference capability.

CN121097402APending Publication Date: 2025-12-09GANSU CHANGFENG ELECTRONIC TECH CO LTD +1
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Patent Information

Application Number
CN202511205575.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-27
Publication Date
2025-12-09

AI Technical Summary

Technical Problem

Existing microstrip patch antennas have fixed polarization directions, making them difficult to adapt to signal transmission in complex electromagnetic environments. Furthermore, existing technologies suffer from high power consumption, low reliability, poor reliability, slow polarization switching speed, high power consumption, and complex structure.

Method used

A polarization-reconfigurable microstrip patch antenna system based on a ferrite substrate is adopted. By controlling four sets of electromagnetic coils to generate a synthetic magnetic field in the ferrite substrate, the equivalent impedance and surface current distribution of the microstrip patch are changed, thereby changing the polarization mode of the antenna, including linear polarization mode, circular polarization mode and closed-loop feedback control algorithm mode.

Benefits of technology

It enables flexible switching of polarization modes, supports linear polarization from 0° to 360° and left-hand/right-hand circular polarization, reduces power consumption to the microwatt level, reduces polarization mismatch loss, and improves communication quality and anti-interference capability.

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Abstract

The invention discloses a polarized reconfigurable microstrip patch antenna system based on a ferrite substrate. The system comprises an antenna body and a driving control unit, the antenna body comprises a ferrite substrate, a microstrip patch unit etched on the ferrite substrate and four groups of electromagnetic coils arranged around the edge of the ferrite substrate; and the driving control unit is used for generating a synthetic magnetic field in the ferrite substrate by controlling the current direction and magnitude of the four groups of coils, so that the equivalent impedance and surface current distribution of the microstrip patch are changed, and the polarization mode of the antenna is further changed. The system has the advantages of flexible polarization mode, low power consumption in operation, high integration level, strong anti-interference capability and the like.
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