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Frequency-Tunable Circularly Polarized Dielectric Resonator Antenna Using Piezoelectric Actuator

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

This paper presents the first investigation of a frequency-tunable circularly polarized (CP) dielectric resonator antenna (DRA). The DRA is excited by a T-shaped metallic strip, where the offset position of the strip generates the CP field. Frequency tunability is obtained by perturbing the electric field within the resonator using four movable dielectric posts. These posts are actuated by a piezoelectric bending actuator, enabling dynamic tuning. Simulated results demonstrate that the antenna maintains high total efficiency across the CP frequency tuning range, exceeding 90%. © 2025 IEEE.
Original languageEnglish
Title of host publication2025 IEEE Conference on Antenna Measurements and Applications (CAMA)
PublisherIEEE
Number of pages4
ISBN (Electronic)979-8-3315-1508-9
ISBN (Print)979-8-3315-1509-6
DOIs
Publication statusPublished - Nov 2025
Event2025 IEEE Conference on Antenna Measurements and Applications (CAMA 2025) - Antibes Juan-les-Pins, France
Duration: 18 Nov 2025 → 20 Nov 2025
https://2025ieeecama.org/

Publication series

NameIEEE Conference on Antenna Measurements and Applications, CAMA
ISSN (Print)2474-1760
ISSN (Electronic)2643-6795

Conference

Conference2025 IEEE Conference on Antenna Measurements and Applications (CAMA 2025)
PlaceFrance
CityAntibes Juan-les-Pins
Period18/11/25 → 20/11/25
Internet address

Funding

This work was supported by the Areas of Excellence Scheme in Hong Kong (Project reference: AoE/E-101/23-N).

Research Keywords

  • Circularly polarized (CP)
  • dielectric posts
  • dielectric resonator antenna (DRA)
  • frequency-tunable
  • high efficiency
  • low loss
  • piezoelectric bending actuator

RGC Funding Information

  • RGC-funded

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  • AoE(UGC): Advanced Antenna Technology for a Smart World

    LUK, K. M. (Principal Investigator / Project Coordinator), CHAN, C. H. (Co-Principal Investigator), GAO, S. (Co-Principal Investigator), LEUNG, K. W. (Co-Principal Investigator), LIN, W. (Co-Principal Investigator), LU, J. (Co-Principal Investigator), LUCYSZYN, S. (Co-Principal Investigator), Pang, S. (Co-Principal Investigator), TONG, K. F. K. (Co-Principal Investigator), WONG, H. (Co-Principal Investigator), WONG, M. H. A. (Co-Principal Investigator), ZHENG, S. (Co-Principal Investigator), LAU, V. K. N. (Co-Investigator), WANG, H. (Co-Investigator) & WONG, K.-K. (Co-Investigator)

    1/01/24 → …

    Project: Research

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