Radiating element of a patch antenna

By using differential feeding and impedance matching structures, the problem of insufficient dual polarization performance of patch antennas in phased array radar systems is solved, achieving low cross-polarization and high isolation RF signal transmission effects, which is suitable for phased array radar systems.

CN116191028BActive Publication Date: 2026-06-16AEROSPACE INFORMATION RES INST CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AEROSPACE INFORMATION RES INST CAS
Filing Date
2022-12-29
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing patch antennas are difficult to achieve good dual-polarization performance over a wide frequency range in phased array radar systems, and they also suffer from strong coupling issues.

⚗Method used

A differential feeding method is adopted. By symmetrically setting horizontal and vertical feeding components and combining horizontal and vertical power dividers, radio frequency signals with equal amplitude and opposite phase are provided to achieve horizontal and vertical polarization. Impedance matching is achieved by using the back cavity, sleeve gap and top patch.

🎯Benefits of technology

It achieves low cross-polarization, good radio frequency signal transmission performance, high symmetry and polarization consistency, and enhances the antenna's isolation and matching performance, making it suitable for phased array radar systems.

✦ Generated by Eureka AI based on patent content.

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Abstract

A radiation unit of a patch antenna, comprising: two horizontal feeding components, the horizontal feeding components being symmetrically arranged with a center of the radiation unit as a symmetric center; two vertical feeding components, the vertical feeding components being symmetrically arranged with a line connecting the two horizontal feeding components as a symmetric axis, and the line connecting the two vertical feeding components passing through the center of the radiation unit; a horizontal power dividing component, respectively electrically connected with the two horizontal feeding components, configured to provide first radio frequency signals with equal amplitudes and opposite phases to the two horizontal feeding components, and the two horizontal feeding components producing horizontal polarization of the first radio frequency signals; and a vertical power dividing component, respectively electrically connected with the two vertical feeding components, configured to provide second radio frequency signals with equal amplitudes and opposite phases to the two vertical feeding components, and the two vertical feeding components producing vertical polarization of the second radio frequency signals.
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