Title :
Low cost stacked circular polarized microstrip antenna
Author :
Assailly, S. ; Terret, C. ; Daniel, J.P. ; Mahdjoubi, K.
Author_Institution :
Lab. Antennes et Microelectron., Rennes Univ., France
Abstract :
A stacked broadband microstrip antenna with circular polarization, composed of two electromagnetically coupled square patches printed on low-loss polypropylene substrate and separated by an air layer, is investigated. Experimental and theoretical results on the input impedance are presented. The bandwidth of the antenna is about 14.4% for a voltage standing-wave ratio of 1.7. The gain in the whole bandwidth is about 9.5 dB. The cross-polar level in both the E and H planes (due to the TM/sub 11/ mode) is better than 20 dB. In circular polarization, an axial ratio of less than 2 dB was measured in the bandwidth in a range of +or-60 degrees around the maximum radiation direction.<>
Keywords :
electric impedance; electromagnetic wave polarisation; microstrip antennas; polymers; substrates; 9.5 dB; EM coupled square patches; air layer; bandwidth; circular polarization; cross-polar level; input impedance; low-loss polypropylene substrate; stacked broadband microstrip antenna; voltage standing-wave ratio; Antenna feeds; Bandwidth; Broadband antennas; Coaxial components; Costs; Electromagnetic coupling; Electromagnetic wave polarization; Impedance; Microstrip antennas; Probes;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134765
