Title :
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
fDate :
Oct. 29 2012-Nov. 1 2012
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;
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
