Ultra-wideband circularly polarized vivaldi antenna

By employing a rotationally symmetric design of four Vivaldi antenna elements and a compact feed network, the miniaturization and bandwidth issues of circularly polarized Vivaldi antennas are resolved, achieving a stable radiation pattern and ultra-wideband characteristics, suitable for satellite communication, radar detection, and wireless communication.

CN116960648BActive Publication Date: 2026-06-26XIDIAN UNIV +1
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Patent Information

Application Number
CN202310833198.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-07
Publication Date
2026-06-26
Estimated Expiration
2043-07-07

AI Technical Summary

Technical Problem

Existing circularly polarized Vivaldi antennas suffer from bandwidth and pattern stability issues during miniaturization, and their large radiating aperture makes it difficult to achieve ultra-wideband and compact designs.

Method used

The four Vivaldi antenna elements, employing a rotationally symmetric structure, achieve phase and amplitude matching of the signal through ground-plane structural multiplexing and a compact 90° sequential phase feed network, combined with an ultra-wideband power divider and a Wilkinson power divider, forming a stable radiation pattern and ultra-wideband characteristics.

Benefits of technology

It achieves ultra-wideband impedance matching and a stable radiation pattern, has a compact aperture size and good circular polarization performance, and is suitable for satellite communication, radar detection and wireless communication systems.

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Abstract

The application relates to an ultra-wideband circularly polarized Vivaldi antenna, which comprises a rotationally symmetric antenna and a feed network; the rotationally symmetric antenna is arranged on the feed network; the rotationally symmetric antenna comprises four Vivaldi antenna units, the four Vivaldi antenna units are orthogonally arranged in sequence, and are fixedly connected with the feed network; each Vivaldi antenna unit comprises a radiation arm, a first ground plane and a substrate; the radiation arm and the first ground plane are arranged on a first surface of the substrate, and a first side of the radiation arm is connected with the first ground plane; the first ground plane of a latter Vivaldi antenna unit is connected with a second side of the radiation arm of a former Vivaldi antenna unit, and serves as a second ground plane of the former Vivaldi antenna unit. The application adopts a half-mode form of the Vivaldi antenna, the antenna has a symmetrical and stable radiation pattern and a compact aperture size through structural multiplexing of the ground planes of the antenna units; and the antenna has good circular polarization performance in combination with the feed network which has good amplitude and phase responses.
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