Title :
Comparison of non-Foster circuit augmentations of a near-field resonant parasitic antenna
Author :
Roberts, Jeffrey S. ; Ziolkowski, Richard W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA
Abstract :
The impedance bandwidth of a metamaterial-inspired, electrically small Egyptian Axe Dipole (EAD) antenna is enhanced by augmenting it internally with a non-Foster circuit. Several different non-Foster implementations have been studied, including a variety of symmetric and asymmetric 2-BJT and 4-BJT based Linvill designs and operational amplifier-based design. The circuit and antenna performance characteristics have been obtained through ANSYS HFSS and Agilent ADS co-simulations. The design goal is a 15% or greater impedance bandwidth from an electrically small, stable, component tolerant, 300 MHz center frequency design.
Keywords :
bipolar transistors; dipole antennas; metamaterial antennas; operational amplifiers; ANSYS HFSS; Agilent ADS cosimulation; BJT based Linvill design; EAD antenna; bipolar junction transistor; frequency 300 MHz; impedance bandwidth; metamaterial-inspired electrically small Egyptian axe dipole antenna; near-field resonant parasitic antenna; nonfoster circuit augmentation; operational amplifier-based design; Bandwidth; Dipole antennas; Impedance; Inductors; Resonant frequency; Wireless communication; Electrically small antennas; impedance bandwidth; metamaterials; non-Foster circuits;
Conference_Titel :
Antennas and Propagation (ISAP), 2014 International Symposium on
Conference_Location :
Kaohsiung
DOI :
10.1109/ISANP.2014.7026525
