TY - GEN
T1 - Study of power efficiency of non-foster impedance matching for electrically small antenna
AU - Yu, Xiaoju
AU - Tang, Qi
AU - Liang, Min
AU - Xin, Hao
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/12
Y1 - 2014/11/12
N2 - Electrically small antenna has attracted much attention because of its potential application in compact wireless communication and sensing systems. Matching is needed before any practical application for an electrically small antenna (ka < 1, k - wavelength number, a - radius of the smallest sphere that can surround the antenna) because it has an input impedance consisting of large reactance and small radiation resistance. An electrically small antenna matched by a lossless passive matching network, according to the Bode-Fano limit, has a narrow bandwidth limitation determined by the high-Q-factor property. A non-Foster element provides a negative reactance slope versus frequency which can cancel the corresponding positive reactance slope of the input impedance of an electrically small antenna. Thus by adding an active matching circuit properly designed with non-Foster element, the electrically small antenna may have a larger impedance bandwidth. Other than the antenna bandwidth, the power efficiency involving DC power dissipation of the antenna system can also be important.
AB - Electrically small antenna has attracted much attention because of its potential application in compact wireless communication and sensing systems. Matching is needed before any practical application for an electrically small antenna (ka < 1, k - wavelength number, a - radius of the smallest sphere that can surround the antenna) because it has an input impedance consisting of large reactance and small radiation resistance. An electrically small antenna matched by a lossless passive matching network, according to the Bode-Fano limit, has a narrow bandwidth limitation determined by the high-Q-factor property. A non-Foster element provides a negative reactance slope versus frequency which can cancel the corresponding positive reactance slope of the input impedance of an electrically small antenna. Thus by adding an active matching circuit properly designed with non-Foster element, the electrically small antenna may have a larger impedance bandwidth. Other than the antenna bandwidth, the power efficiency involving DC power dissipation of the antenna system can also be important.
UR - http://www.scopus.com/inward/record.url?scp=84916229495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84916229495&partnerID=8YFLogxK
U2 - 10.1109/USNC-URSI.2014.6955512
DO - 10.1109/USNC-URSI.2014.6955512
M3 - Conference contribution
AN - SCOPUS:84916229495
T3 - 2014 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2014 - Proceedings
SP - 130
BT - 2014 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2014 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2014
Y2 - 6 July 2014 through 11 July 2014
ER -