A novel reconfigurable patch antenna with both frequency and polarization diversities for wireless communications

A novel reconfigurable patch antenna that applies the PASS concept is presented in this paper to obtain both frequency and polarization diversities for wireless communications. With single patch and single feed, the antenna operates at two different frequencies with a frequency ratio of 1.055, similar radiation pattern and opposite circular polarizations. Experiments are carried out to demonstrate the feasibility of the design, and satisfactory axial ratios of 1.86 dB and 1.99 dB are obtained. The presented methodology is very promising in antenna design for satellite and mobile communications, which require multi-frequency operation to enhance the channel capacity, and different polarizations to prevent crosstalk between the channels.

[1]  Jennifer T. Bernhard.  Reconfigurable antennas and apertures: state of the art and future outlook , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  Y. Rahmat-Samii,et al.  Patch antenna with switchable slot (PASS): Dual‐frequency operation , 2001 .

[3]  J.T. Bernhard,et al.  A novel radiation pattern and frequency reconfigurable single turn square spiral microstrip antenna , 2003, IEEE Microwave and Wireless Components Letters.

[4]  Y. Rahmat-Samii,et al.  A reconfigurable patch antenna using switchable slots for circular polarization diversity , 2002, IEEE Microwave and Wireless Components Letters.