Title :
Widely tunable stacked microstrip antenna using varactor diodes
Author :
Nishiyama, Eisuke ; Itoh, Tatsuo
Author_Institution :
Electr. Eng. Dept., UCLA, Los Angeles, CA
Abstract :
A novel tunable stacked microstrip antenna is proposed in this paper, and the characteristics are simulated including a varactor diode loss. Four varactor diodes are embedded along the non-radiating edges of the patch and a reverse DC bias is applied to change the tuning frequency. The gain is low at large capacitance of the varactor. However by staking a parasitic patch on the driven patch, the antenna efficiency remarkably enhances and gain increases. Consequently, the wide tuning range of 2.6-5GHz (63%) is achieved and the capability is confirmed experimentally.
Keywords :
capacitance; microstrip antennas; tuning; varactors; capacitance; frequency 2.6 GHz to 5 GHz; parasitic patch antenna; reverse DC bias; tunable stacked microstrip antenna; tuning frequency; varactor diode loss; Antenna measurements; Antenna radiation patterns; Capacitance; Diodes; Loaded antennas; Microstrip antennas; Patch antennas; Resonant frequency; Tuning; Varactors;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958168
