Reconfigurable Single Port Antenna With Circular Polarization Diversity

• Published in: IEEE transactions on antennas and propagation Vol. 57; no. 2; pp. 555 - 559
• Main Authors: Khaleghi, A., Kamyab, M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-02-2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna diversity; Antennas; Applied sciences; Business and industry local networks; Channels; Circular polarization; Diversity reception; Exact sciences and technology; Fading; Feeds; Ground plane; Impedance matching; Indoor; microstrip antennas; Networks and services in france and abroad; parasitic antennas; Patch antennas; Pins; Polarization; Radiocommunications; reconfigurable antennas; Switches; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Transmission and modulation (techniques and equipments); Wideband; Wireless LAN; Performance evaluation; Polarization diversity; Wireless LAN; reconfigurable antennas; Circular polarization; parasitic antennas; Wireless telecommunication; Optimization; Antenna gain; Impedance matching; Indoor installation; Wide band; Radiation pattern; Axial ratio; Reconfigurable architectures; Capacitive coupling; Circular antenna; Antenna radiation patterns; Fading channels; Antenna diversity; Return loss; Rayleigh channels; Printed antenna; microstrip antennas; Diversity reception
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2008.2011394

New design of a single feed reconfigurable circular patch antenna with polarization pattern diversity is presented. The radiating circular patch, printed on a thin substrate, is supported by non conductive posts on a conducting ground plane and is excited with a capacitively coupled feed. Wideband impedance matching is achieved. The pattern diversity is generated using two switch parasitic pins between the circular patch and the ground plane. By optimizing the position of the switching elements, two orthogonal patterns with the right-hand circular polarization (RHCP) and the left-hand circular polarization (LHCP) are generated. These patterns are used for diversity reception in indoor fading channel for wireless LAN applications. Detailed design of the antenna is described. Experimental results for return loss, radiation patterns, radiation efficiency, antenna gain, axial ratio and the diversity performance in Rayleigh fading channel are presented.