Title :
Evaluating the efficiency of antennas used as sensors in microwave tissue imaging
Author :
Moussakhani, Kaveh ; Amineh, Reza K. ; Nikolova, Natalia K.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, ON, Canada
Abstract :
A new method is proposed to evaluate the efficiency of antennas used in tissue microwave imaging. In this method, two identical antennas are employed, one transmitting and the other one receiving, in a setup where the scattering parameters are measured. Each antenna is considered as a two-port network and the antenna efficiency is expressed in terms of its equivalent network parameters. A signal flow graph (SFG) is developed for the two-port network formed by the two antennas and the medium between them. A system of equations is derived from the SFG and it is solved for the acquired data. This solution provides the efficiency of the antenna. The accuracy of the efficiency estimated from measured and simulated data is verified through comparison with full-wave simulations.
Keywords :
S-parameters; biological tissues; microwave antennas; microwave imaging; receiving antennas; signal flow graphs; transmitting antennas; two-port networks; SFG; antenna efficiency; equivalent network parameters; microwave tissue imaging; receiving antennas; scattering parameters are; signal flow graph; tissue microwave imaging; transmitting antennas; two-port network; Antenna measurements; Microwave antennas; Microwave imaging; Microwave theory and techniques; Scattering parameters;
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.2013.6711706
