DocumentCode :
1187061
Title :
Deembedding of lossy Foster networks
Author :
Kajfez, Darko
Author_Institution :
Dept. of Electr. Eng., Univ. of Mississippi, University, MS, USA
Volume :
53
Issue :
10
fYear :
2005
Firstpage :
3199
Lastpage :
3205
Abstract :
Data-processing procedures are described, which should be useful for measurement of the radiation Q factors of small antennas such as microstrip patch antennas or dielectric-resonator antennas. Typical values of radiation Q factors are quite low, of the order of ten or even smaller. Two equivalent Foster-type networks are proposed, modified for the presence of losses: one for the single resonance behavior, and another for the dual resonance behavior. The individual network elements are determined by optimization. A least squares procedure is described that can provide a good estimate for the starting values of the optimization.
Keywords :
Q-factor; dielectric resonator antennas; equivalent circuits; least squares approximations; microstrip antennas; optimisation; data processing procedures; deembedding; dielectric-resonator antennas; dual resonance behavior; least squares procedure; lossy Foster networks; microstrip patch antennas; optimization; radiation Q factors; single resonance behavior; small antennas; Antenna measurements; Bandwidth; Coaxial components; Dielectric measurements; Frequency measurement; Least squares approximation; Microstrip antennas; Microwave antennas; Power transmission lines; Resonance; Dielectric-resonator antennas; Foster equivalent networks; low-; microstrip antennas; resonators;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2005.855143
Filename :
1516325
Link To Document :
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