Triple-Band Dual-Sense Circularly Polarized Hybrid Dielectric Resonator Antenna

Sensors

Munkyo Seo¹  Amir Altaf¹ 

[1] Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 440-746, Korea;

关键词: dielectric resonator antenna (DRA);    hybrid antenna;    multi-band;    square microstrip ring;    triple-band circular polarization;   

DOI  :  10.3390/s18113899

来源: DOAJ

【 摘 要 】

In this paper, a triple-band dual-sense circularly polarized (CP) hybrid dielectric resonator antenna is proposed. A modified hexagonal dielectric resonator (DR) is top-loaded with a square microstrip ring (SMR). A vertical-tapered-strip connected to a 50- $\Omega$ microstrip line is used to excite the proposed antenna. It is found that the lower and central CP bands correspond to left-handed circular polarization and are produced by the TM ${}_{11}$ and TE ${}_{111}$ modes of the SMR and modified hexagonal DR, respectively. The upper CP band is formed by the combination of the quasi-TM ${}_{21}$ mode of the SMR and quasi-TE ${}_{111}$ mode of the DR that exhibits right-handed circular polarization. The measurement results of the fabricated prototype show triple-band response for |S ${}_{11}|<$ −10 dB with impedance bandwidths (IBWs) of 17.4% (1.75⁻2.03 GHz), 28.13% (2.23⁻2.96 GHz), and 2.97% (3.65⁻3.76 GHz) in the lower, central, and upper bands, respectively. The measured 3 dB axial ratio bandwidths lying within −10 dB IBWs are 3.69% (1.86⁻1.93 GHz), 5.46% (2.67⁻2.82 GHz), and 2.15% (3.68⁻3.76 GHz) along with the peak gains of 5 dBic, 5.28 dBic, and 2.36 dBic in the lower, central, and upper bands, respectively.

【 授权许可】

Unknown