Title :
Non-Foster matching of Electrically Small Antennas. Stability considerations
Author :
Ugarte-Muñoz, Eduardo ; Segovia-Vargas, Daniel ; González-Posadas, Vicente ; Martín, José Luis Jiménez-
Author_Institution :
Dept. of Signal Theor. & Commun., Carlos III Univ. of Madrid, Leganes, Spain
Abstract :
Stability is the biggest problem in the matching of Electrically Small Antennas (ESAs) using non-Foster reactances realized by Negative Impedance Converters (NICs). However, it is not usually studied properly. In this paper we propose the Normalized Determinant Function (NDF) as a powerful method to test the stability of the systems formed by the NIC and the ESA, and we will show how conventional design can lead us to unstable solutions.
Keywords :
antennas; impedance convertors; electrically small antenna matching; negative impedance converter; nonFoster reactance; nonfoster matching; normalized determinant function; stability; Broadband antennas; Capacitors; Circuit stability; Impedance; Stability criteria;
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.2012.6348830
