Title :
Antenna bandwidth enhancement by ferroelectric tunable matching network
Author :
Zheng, Yuliang ; Giere, Andre ; Maune, Holger ; Sazegar, Mohsen ; Jakoby, Rolf
Author_Institution :
Microwave Eng., Tech. Univ. Darmstadt, Darmstadt
Abstract :
This paper extends the design theory of tunable matching network to consider frequency dependent load impedance. It illustrates the theoretical potential and the restriction of bandwidth enhancement for poorly matched monopole antenna by using tunable matching network. The technology of a prototype network using ferroelectric varactors based on barium-strontium-titanate is addressed. The bandwidth enhancement is proven by realization of an in-situ demonstrator.
Keywords :
barium compounds; ferroelectric capacitors; impedance matching; monopole antennas; strontium compounds; varactors; BaSrTiO3; antenna bandwidth enhancement; barium strontium titanate; ferroelectric tunable matching network; ferroelectric varactors; frequency-dependent load impedance; in-situ demonstrator; monopole antenna; Antenna accessories; Bandwidth; Capacitance; Ferroelectric materials; Frequency; Impedance matching; Microwave antennas; Mobile antennas; Q factor; 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.2008.4958534
