Title :
An experimental technique for measuring the unloaded Q of resonant antenna structures
Author :
Weiss, Steven J.
Author_Institution :
US Army Res. Lab., Adelphi, MD, USA
Abstract :
The measurement technique places a resonant antenna structure; such as a patch or dielectric resonator antenna on a large reflecting plane. Two auxiliary antennas are employed in the measurement process. Antenna number 1 acts as a transmitting antenna and is oriented at an angle of approximately 45 degrees with respect to the x-y plane. Antenna number 2 acts as a receiving antenna and is oriented along the z-direction normal to the ground plane and is placed directly above the patch antenna. This orientation places it in a near minimum of the specular beam. Both antennas are properly polarized with respect to the desired radiation field of the patch antenna.
Keywords :
Q-factor measurement; antenna radiation patterns; antenna testing; dielectric resonator antennas; electromagnetic wave polarisation; electromagnetic wave reflection; electromagnetic wave scattering; microstrip antennas; receiving antennas; transmitting antennas; auxiliary antennas; dielectric resonator antenna; large reflecting plane; patch; polarization; radiation field; receiving antenna; resonant antenna structures; transmitting antenna; unloaded Q measurement; Antenna measurements; Dielectric measurements; Dielectric resonator antennas; Measurement techniques; Patch antennas; Q measurement; Receiving antennas; Reflector antennas; Resonance; Transmitting antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552432
