Negative impedance converters for broadband antenna matching

Author

Tade, O.O. ; Gardner, Peter ; Hall, Peter S.

Author_Institution

Sch. of Electron., Electr. & Comput. Eng., Univ. of Birmingham, Birmingham, UK

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

613

Lastpage

616

Abstract

The need for small antennas with wide instantaneous bandwidth is well established in mobile Cognitive radio nodes or transceivers. The fundamental limit of small antennas is a problem which passive matching cannot solve. However, non-Foster matching provides a means of getting around this problem. In this paper, we show a negative impedance converter that provides a negative capacitor up to 1.5GHz and we show how it can be used to match a small chassis antenna. This improves the instantaneous bandwidth of the antenna beyond what is achievable with passive matching.

Keywords

broadband antennas; capacitors; impedance convertors; broadband antenna matching; instantaneous bandwidth; mobile cognitive radio nodes; negative capacitor; negative impedance converters; nonFoster matching; passive matching; small chassis antenna; transceivers; Antenna measurements; Broadband antennas; Capacitors; Stability analysis; Transmission line measurements; Wideband; Electrically small antenna; cognitive radio; impedance matching;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2012 42nd European

Conference_Location

Amsterdam

Print_ISBN

978-1-4673-2215-7

Electronic_ISBN

978-2-87487-026-2

Type

conf

Filename

6459295