Title :
A Wideband Sequential-Phase Fed Circularly Polarized Patch Array
Author :
Changjiang Deng ; Yue Li ; Zhijun Zhang ; Zhenghe Feng
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
This communication presents a wideband circularly polarized (CP) 2 × 2 patch array using a sequential-phase feeding network. By combining three operating modes, both axial ratio (AR) and impedance bandwidths are enhanced and wider than those of previous published sequential-fed single-layer patch arrays. These three CP operating modes are tuned and matched by optimizing the truncated corners of patch elements and the sequential-phase feeding network. A prototype of the proposed patch array is built to validate the design experimentally. The measured -10-dB impedance bandwidth is 1.03 GHz (5.20-6.23 GHz), and the measured 3-dB AR bandwidth is 0.7 GHz (5.25-5.95 GHz), or 12.7% corresponding to the center frequency of 5.5 GHz. The measured peak gain is about 12 dBic and the gain variation is less than 3 dB within the AR bandwidth.
Keywords :
antenna radiation patterns; broadband antennas; microstrip antenna arrays; CP operating modes; axial ratio; frequency 5.5 GHz; impedance bandwidths; sequential-fed single-layer patch arrays; sequential-phase feeding network; wideband sequential-phase fed circularly polarized patch array; Arrays; Bandwidth; Dielectric resonator antennas; Frequency measurement; Gain; Impedance; Microstrip antenna arrays; Broadband antenna; circular polarization; microstrip array; sequential rotation;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2321380