Title :
Broadband Circularly Polarized Printed Antenna With Branched Microstrip Feed
Author :
Yuan-Ming Cai ; Ke Li ; Ying-Zeng Yin ; Wei Hu
Author_Institution :
Sci. & Technol. on Antennas & Microwave Lab., Xidian Univ., Xi´an, China
Abstract :
A novel broadband circularly polarized antenna is presented in this letter. It consists of a triangular monopole and a slot etched on the ground plane. By employing a branched microstrip feedline to excite the monopole and the slot in parallel, the broadband circular polarization performance of the proposed antenna is realized with overall size of 38 × 54 mm 2. The measured 3-dB axial-ratio bandwidth is 46.8% ( 2.13 ~ 3.43 GHz), and the impedance bandwidth for S 11leqslant -10 dB is 73.0% ( 1.99 ~ 4.28 GHz). Good agreement between the simulated and measured results is also achieved, validating our design concept. The surface current analysis and a parametric study of the design are also carried out to explain the mechanism of circular polarization .
Keywords :
antenna feeds; broadband antennas; microstrip antennas; monopole antennas; bandwidth 1.99 GHz to 4.28 GHz; bandwidth 2.13 GHz to 3.43 GHz; branched microstrip feedline; broadband circular polarization performance; broadband circularly polarized printed antenna; circular polarization mechanism; ground plane; surface current analysis; triangular monopole; Antenna measurements; Bandwidth; Broadband antennas; Microstrip; Microstrip antennas; Polarization; Branched microstrip feed; broadband; circularly polarized;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2314317
