Title :
Stability of non-Foster circuits for broadband impedance matching of electrically small antennas
Author :
Elfrgani, Aseim M. ; Rojas, Roberto G.
Author_Institution :
Dept. Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
Non-Foster circuits are promising for numerous microwave and antenna applications because they are not limited by the gain-bandwidth product. However, the stability of these circuits is a key issue for their design. In this paper we introduce a three-step scheme to systematically stabilize a non-Foster circuit (NFC) topology that can be used in numerous applications. To demonstrate the stabilization procedure, a NFC to match electrically small antenna is examined. The circuit is stabilized using conventional controllers. Measurements have been performed and results are showing improvement in the antenna gain up to 14 dB.
Keywords :
capacitors; impedance matching; inductors; logic gates; microwave antennas; monopole antennas; negative impedance convertors; network synthesis; network topology; NFC topology; broadband impedance matching; electrically small monopole antennas; gain 14 dB; microwave applications; negative capacitors; negative impedance converters; negative impedance inverters; negative inductors; systematic non foster circuit topology stability; the gain-bandwidth product; Antenna measurements; Broadband antennas; Circuit stability; Loaded antennas; Stability criteria; Transfer functions; Electrically small antenna; Matching Networks; Non-Foster Circuits; Stability;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2015 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/RWS.2015.7129764
