Title :
Realizing non-Foster circuits for antennas
Author :
Stefanopoulos, S. ; Koulouridis, Stavros
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Patras, Rio-Patras, Greece
Abstract :
We discuss the process for realizing non-Foster active networks for antenna matching. Negative Impedance Converters (NICs) have recently gained a lot of attention, since they allow for overcoming fundamental limitations of small antennas. Here, we employ four NICs to match a patch antenna to 50-Ohm feeding. Each circuit is tested for its stability when loaded with the full network and we employ a method for reducing the open loop gain by introducing losses in the feedback loops of the network.
Keywords :
active networks; microstrip antennas; negative impedance convertors; NIC; antenna matching; feedback loop; negative impedance converters; non-Foster active network; open loop gain; patch antenna; resistance 50 ohm; Broadband antennas; Capacitors; Circuit stability; Impedance; Stability criteria; Nyquist criterion; active matching; negative impedance; stability;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6711638
