TY - GEN
T1 - Non-foster circuit matching of a near-field resonant parasitic, electrically small antenna
AU - Roberts, Jeffrey S.
AU - Ziolkowski, Richard W.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/12/23
Y1 - 2015/12/23
N2 - The impedance bandwidth of a near-field resonant parasitic (NFRP) element of an electrically small, metamaterial-inspired Egyptian Axe Dipole (EAD) antenna, can be altered significantly by embedding a non-Foster circuit element into it. The frequency agile behavior of the reactance component internal to the NFRP element of an EAD antenna with a center frequency of 300 MHz is established and a negative impedance converter (NIC) circuit is designed to mimic this behavior. Several other non-Foster circuits have been considered for the NIC implementation and will be discussed in our presentation. A Linvill-based design of the requisite NIC, which contains 4 bipolar junction transistors (BJTs), is presented here. ANSYS HFSS was used for the antenna simulation results; Agilent ADS was used for the circuit simulations. The co-designed, optimized results show an increase in the EAD fractional impedance bandwidth from 0.9% to 46.0%, a factor of over 50 times improvement.
AB - The impedance bandwidth of a near-field resonant parasitic (NFRP) element of an electrically small, metamaterial-inspired Egyptian Axe Dipole (EAD) antenna, can be altered significantly by embedding a non-Foster circuit element into it. The frequency agile behavior of the reactance component internal to the NFRP element of an EAD antenna with a center frequency of 300 MHz is established and a negative impedance converter (NIC) circuit is designed to mimic this behavior. Several other non-Foster circuits have been considered for the NIC implementation and will be discussed in our presentation. A Linvill-based design of the requisite NIC, which contains 4 bipolar junction transistors (BJTs), is presented here. ANSYS HFSS was used for the antenna simulation results; Agilent ADS was used for the circuit simulations. The co-designed, optimized results show an increase in the EAD fractional impedance bandwidth from 0.9% to 46.0%, a factor of over 50 times improvement.
KW - Electrically small antennas
KW - metamaterials
KW - negative impedance converters
KW - non-Foster circuits
UR - https://www.scopus.com/pages/publications/84963858077
UR - https://www.scopus.com/pages/publications/84963858077#tab=citedBy
U2 - 10.1109/IWAT.2015.7365269
DO - 10.1109/IWAT.2015.7365269
M3 - Conference contribution
AN - SCOPUS:84963858077
T3 - 2015 International Workshop on Antenna Technology, iWAT 2015
SP - 89
EP - 91
BT - 2015 International Workshop on Antenna Technology, iWAT 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - International Workshop on Antenna Technology, iWAT 2015
Y2 - 4 March 2015 through 6 March 2015
ER -