Title :
A dual-band circularly-polarized stacked patch antenna with a small frequency-ratio
Author :
Changjiang Deng ; Yue Li ; Zhenghe Feng ; Wenming Li ; Da Zhang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A novel dual-band circularly-polarized (CP) stacked patch antenna is presented in this paper. The antenna consists of two layers of FR4 substrates separated by an air gap. The dual-band circular polarization is achieved from aperture-coupled elements by a rotated square patch and a circular patch, which are etched on the top and bottom sides of the upper substrate. Computed results show that the -10 dB reflection coefficient bandwidths are 15.4% centered at 2.18 GHz and 14.2% centered at 2.5 GHz, respectively. The 3 dB axial-ratio (AR) bandwidths are 2.75% and 2.6%, which are within the reflection coefficient bandwidths. The frequency ratio of dual bands is 1.148.
Keywords :
electromagnetic wave polarisation; electromagnetic wave reflection; microstrip antennas; multifrequency antennas; AR bandwidth; FR4 substrate layers; air gap; aperture-coupled element; axial-ratio bandwidth; circular patch; dual-band CP stacked patch antenna; dual-band circularly-polarized stacked patch antenna; dual-band frequency ratio; frequency 2.18 GHz; frequency 2.5 GHz; reflection coefficient bandwidth; rotated square patch; Bandwidth; Dual band; Microstrip antennas; Patch antennas; Polarization; Substrates;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6711130
