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학술지 Frequency-Tunable Waveguide Antenna With Miniaturized Aperture Using a Varactor-Loaded Split-Ring Resonator
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저자
박욱기, 오순수, 이영환, 박효달
발행일
201101
출처
IEEE Antennas and Wireless Propagation Letters, v.9, pp.1233-1236
ISSN
1536-1225
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LAWP.2011.2105240
협약과제
10MR3700, 무선통신 ERP/EIRP 측정기술 및 기준 연구, 이영환
초록
We propose a frequency-tunable waveguide antenna with a size-reduced aperture. Up to now, waveguide antennas with split-ring resonators have exhibited narrow-frequency bandwidths. To expand the operating frequency band, the resonant frequency of a split-ring resonator is tuned by adjusting the capacitance of the gap. A capacitor-loaded split-ring resonator is simulated and experimentally tested to validate its performance, and a varactor-loaded split-ring resonator is then investigated. The effective capacitance of the varactor-loaded split-ring resonator is changed by varying the external dc voltage. The tunable frequency range extends from 1.96 to 2.36 GHz (a fractional frequency range of 18.5%). The simulations and experiments yield good results for the reflection coefficient, radiation pattern, and gain. The proposed antenna retains the 70% aperture reduction of previously developed split-ring-resonator-loaded waveguide antennas. © 2011 IEEE.
KSP 제안 키워드
6 GHz, DC voltage, Effective capacitance, Fractional frequency, Frequency Range, Operating frequency, Radiation Pattern, Reflection Coefficient, Resonant frequency(Fr), Tunable waveguide, frequency band