A Novel Single-Fed Wide Dual-Band Circularly Polarized Dielectric Resonator Antenna

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 HE<sub>111</sub> and HE<sub>11δ</sub> (2 <; δ <; 3 ) modes are utilized for the dual-band design. To achieve CP fields, two notches are truncated from the cylindrical DRA at φ = 45<sup>°</sup> and 225 <sup>°</sup>. A pair of equal arc-shaped slots are used to improve the axial-ratio (AR) and impedance bandwidths. The antenna features impedance bandwidths (|S<sub>11</sub>| <; -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.

[1]  Shao Yong Zheng,et al.  Dual-Band and Dual-Sense Omnidirectional Circularly Polarized Antenna , 2014, IEEE Antennas and Wireless Propagation Letters.

[2]  Kwok Wa Leung,et al.  Wideband Circularly Polarized Dielectric Bird-Nest Antenna With Conical Radiation Pattern , 2013, IEEE Transactions on Antennas and Propagation.

[3]  Kwok Wa Leung,et al.  Linear-/Circular-Polarization Designs of Dual-/Wide-Band Cylindrical Dielectric Resonator Antennas , 2012, IEEE Transactions on Antennas and Propagation.

[4]  Homayoon Oraizi,et al.  A Novel Low-Cost Circularly Polarized Rotated Stacked Dielectric Resonator Antenna , 2014, IEEE Antennas and Wireless Propagation Letters.

[5]  R. Chair,et al.  Aperture fed wideband circularly polarized rectangular stair shaped dielectric resonator antenna , 2006, IEEE Transactions on Antennas and Propagation.

[6]  Kwok Wa Leung,et al.  Design of dual-band circularly polarized dielectric resonator antenna using a higher-order mode , 2012, 2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC).

[7]  Kwok Wa Leung,et al.  Singly-Fed Dual-Band Circularly Polarized Dielectric Resonator Antenna , 2014, IEEE Antennas and Wireless Propagation Letters.

[8]  H. Ng,et al.  Dielectric Resonator Antennas , 2005 .

[9]  Kwok Wa Leung,et al.  Wideband Circularly Polarized Trapezoidal Dielectric Resonator Antenna , 2010, IEEE Antennas and Wireless Propagation Letters.