Wideband Dielectric Patch Antenna with Stable Radiation Pattern

A dielectric patch antenna (DPA) with a wide impedance bandwidth and a stable radiation pattern is investigated. By making use of the fact that the E -field distributions of different modes of the DPA are distinctive, multiple air regions are elaborately introduced into the DPA. They can manipulate...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2023-07, Vol.22 (7), p.1-5
Main Authors: Li, Wen, Ren, Jian, Zhang, Bing, Liu, Yan-Ting, Zhang, Honghao, Yin, Yingzeng, Shen, Ming
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Antennas
Bandwidth
Bandwidths
Boresights
Broadband antennas
Dielectric patch antenna (DPA)
high-order mode
Impedance
Patch antennas
Radiation
radiation pattern stability
Resonant frequencies
Resonant frequency
Substrates
Superhigh frequencies
wideband antenna
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Summary:A dielectric patch antenna (DPA) with a wide impedance bandwidth and a stable radiation pattern is investigated. By making use of the fact that the E -field distributions of different modes of the DPA are distinctive, multiple air regions are elaborately introduced into the DPA. They can manipulate the resonant frequencies of different modes. As a result, the impedance bandwidth can be enhanced by merging the fundamental TM 101 and higher order modes TM 121 , TM 321 and TM 141 . The air regions can also regulate the E -field distributions of the higher order modes TM 321 and TM 141 , reducing the out-of-phase E -fields and improving the radiation pattern. To validate the idea, a prototype operating in the X-band was designed, fabricated and measured. Reasonable agreement between the measured and simulated results is observed. The measured 10-dB impedance bandwidth (|S 11 | < -10 dB) is 44.9% (8.3-13.1 GHz), with the measured peak boresight realized gain being 8.95 dBi. Stable radiation patterns can be obtained within the working band.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2023.3261506