Title :
An L-band tunable microstrip antenna using multiple varactors
Author :
Zhang Jin ; Mortazawi, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
A tunable rectangular microstrip antenna at L-band is designed, fabricated and measured. 8 varactors are placed at the two radiating edges of the antenna. The resonant frequency is tuned from 1.45 to 1.8 GHz (tunability of 24%). The return loss is less than -12 dB over the entire tuning range and the maximum gain is 7.58 dB. Multiple varactor loaded antennas achieve higher gain than single varactor loaded ones reported previously.
Keywords :
UHF antennas; antenna radiation patterns; equivalent circuits; microstrip antennas; tuning; varactors; 1.45 to 1.8 GHz; L-band antennas; equivalent circuit; figure of merit; multiple varactors; radiating edges; radiation patterns; rectangular microstrip antenna; return loss; tunable rectangular microstrip antenna; Bandwidth; Capacitance; Equivalent circuits; Frequency; L-band; Loaded antennas; Microstrip antennas; Semiconductor diodes; Tuning; Varactors;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220325
