TY - GEN
T1 - Stability of tunnel diode based negative impedance circuit
AU - Tang, Qi
AU - Xin, Hao
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/12
Y1 - 2014/11/12
N2 - Recently there are increasing interests in incorporating negative impedance converter (NIC) circuits into electrically small antennas to surpass the Chu limit and into metamaterial unit structures to eliminate the strong dispersion. Most of the works are transistor based (e.g. Linvill's NIC circuit) or operational amplifier based (at low frequency). Our previous work has demonstrated some challenging issues remain in these designs, such as the limitation on operation frequency, parasitics, noise and stability. An alternative method to realize NIC circuit is by combining negative resistances and passive lumped elements. The configuration is firstly proposed 80 years ago (L. C. Verman, Proc. IRE, 19, 676-681, 1931), however, without a stability analysis. The negative resistance can be implemented by tunnel diodes, which has the advantages of high operational frequency and low-noise level.
AB - Recently there are increasing interests in incorporating negative impedance converter (NIC) circuits into electrically small antennas to surpass the Chu limit and into metamaterial unit structures to eliminate the strong dispersion. Most of the works are transistor based (e.g. Linvill's NIC circuit) or operational amplifier based (at low frequency). Our previous work has demonstrated some challenging issues remain in these designs, such as the limitation on operation frequency, parasitics, noise and stability. An alternative method to realize NIC circuit is by combining negative resistances and passive lumped elements. The configuration is firstly proposed 80 years ago (L. C. Verman, Proc. IRE, 19, 676-681, 1931), however, without a stability analysis. The negative resistance can be implemented by tunnel diodes, which has the advantages of high operational frequency and low-noise level.
UR - http://www.scopus.com/inward/record.url?scp=84916218128&partnerID=8YFLogxK
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U2 - 10.1109/USNC-URSI.2014.6955513
DO - 10.1109/USNC-URSI.2014.6955513
M3 - Conference contribution
AN - SCOPUS:84916218128
T3 - 2014 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2014 - Proceedings
SP - 131
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 -