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

fYear

2008

fDate

16-20 Dec. 2008

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APMC.2008.4958534

Filename

4958534