An ultra-wideband high-gain vivaldi antenna loaded with wave-absorbing material
By loading absorbing materials into the Vivaldi antenna and optimizing the radiating arm structure, the problems of low low-frequency gain and insufficient impedance bandwidth were solved, achieving high gain and broadband matching, thus improving the detection effect of ground penetrating radar.
CN122158964APending Publication Date: 2026-06-05CHINA INST OF RADIO PROPAGATION +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA INST OF RADIO PROPAGATION
- Filing Date
- 2026-03-31
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
Existing Vivaldi antennas in air-coupled ground-penetrating radar suffer from low-frequency gain, insufficient impedance bandwidth, and low front-to-back ratio, which affect detection performance.
Method used
By loading absorbing material into the Vivaldi antenna, designing a circular matching slot, a metal director, a reflector, and an absorbing module, and optimizing the radiating arm structure, impedance broadband matching, suppression of time-domain ringing response, and energy focusing are achieved.
Benefits of technology
It improved the low-frequency gain and impedance bandwidth of the antenna, suppressed the time-domain ringing response, enhanced the longitudinal resolution and defect location accuracy, and strengthened the detection capability.
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Smart Images
Figure CN122158964A_ABST
Abstract
The application relates to the technical field of ground penetrating radar antennas, and discloses an ultra-wideband high-gain Vivaldi antenna loaded with wave-absorbing materials, which comprises a dielectric substrate with a feeding end and a radiating end arranged oppositely and comprising a first plate surface and a second plate surface arranged oppositely; an antenna radiator arranged on the first plate surface and having two radiation arms, the two radiation arms each having a first radiation arm surface facing each other, the two first radiation arm surfaces extending in a direction away from each other from the feeding end to the radiating end so that a gradually expanding groove is formed between the two first radiation arm surfaces; a circular matching groove is arranged on the antenna radiator and close to the feeding end; a wave-absorbing module is arranged on each side end of the two radiation arms away from each other; a metal director is arranged on the first plate surface and located at the radiating end; a reflector is internally provided with a reflection cavity, at least part of the feeding end is inserted into the reflection cavity, and a spacing is formed between the feeding end and the side wall of the reflection cavity. The Vivaldi antenna can alleviate the defects of low gain at low frequency, insufficient impedance bandwidth and low front-to-back ratio of the conventional Vivaldi antenna.
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