Title :
Broadband matching of small antennas using negative impedance converters
Author :
Tade, O.O. ; Gardner, P. ; Hall, P.S.
Author_Institution :
Sch. of Electron., Electr. & Comput. Eng., Univ. of Birmingham, Birmingham, UK
Abstract :
Small antennas with wide instantaneous bandwidth are vital in mobile Cognitive radio nodes or transceivers. The fundamental limit of small antennas is a problem which passive matching cannot solve. Non-Foster matching provides a solution to this problem. In this paper, we show a negative impedance converter that provides a negative capacitor up to 1.5GHz and use it to match a small chassis antenna. This improves the Q of the antenna beyond what is achievable with passive matching.
Keywords :
antennas; impedance convertors; impedance matching; broadband matching; negative capacitor; negative impedance converter; passive matching; small antenna; small chassis antenna; Antenna measurements; Broadband antennas; Impedance; Loss measurement; Transmission line measurements; Wideband; Electrically small antenna; cognitive radio; non-Foster matching networks;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6348833
