A Novel Single-Fed Wide Dual-Band Circularly Polarized Dielectric Resonator Antenna
A Novel Single-Fed Wide Dual-Band Circularly Polarized Dielectric Resonator Antenna
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DOI：
10.1109/lawp.2015.2481462
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发表时间：
2016-01-01
影响因子：
4.2
通讯作者：
Ni, Tao
中科院分区：
文献类型：
--
作者：
Zhou, Yao-Dong;Jiao, Yong-Chang;Ni, Tao
A new single-fed wide dual-band circularly polarized (CP) dielectric resonator antenna (DRA) is presented in this letter. The DRA is excited by a microstrip line through the narrow underneath rectangular aperture, and its and HE11 delta (2 < delta < 3) modes are utilized for the dual-band design. To achieve CP fields, two notches are truncated from the cylindrical DRA at phi = 45 degrees and 225 degrees. A pair of equal arc-shaped slots are used to improve the axial-ratio (AR) and impedance bandwidths. The antenna features impedance bandwidths (vertical bar S-11 vertical bar < -10 dB) of 26.25% and 11.17%, and 3-dB AR bandwidths of 15.8% and 5.02% in the lower and upper bands, respectively. To verify the simulation, the antenna is designed and measured. Reasonable agreement between measured and simulated results is obtained.
