Title :
A Study of Ultrawideband Antennas for Near-Field Imaging
Author :
Jafari, Hamed M. ; Deen, M. Jamal ; Hranilovic, Steve ; Nikolova, Natalia K.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont.
fDate :
4/1/2007 12:00:00 AM
Abstract :
A compact ultrawideband (UWB) antenna has been designed for UWB cancer detection systems. The numerical analysis and experimental characterization of a printed monopole antenna fed by a 50-Omega coplanar waveguide (CPW) and operating in a lossy coupling medium is presented. A detailed 3D model of the antenna and the biological environment has been constructed and simulated in XFDTD and HFSS. The near-field pattern of the antenna in the proximity of a multilayer human body model and the effect of the human body on the input matching of the antenna are studied. Experimental results show that the return loss is below -9.6 dB from 3.4 GHz to 9.9 GHz
Keywords :
antenna feeds; antenna radiation patterns; biomedical imaging; cancer; coplanar waveguides; finite difference time-domain analysis; microstrip antenna arrays; microwave imaging; monopole antenna arrays; ultra wideband antennas; 3.4 to 9.9 GHz; HFSS; UWB imaging; XFDTD; cancer detection system; coplanar waveguide; finite difference time domain analysis; high frequency structural simulator; lossy coupling medium; multilayer human body model; near-field pattern; printed monopole antenna feed; ultrawideband antenna; Biological system modeling; Cancer detection; Coplanar waveguides; Humans; Impedance matching; Nonhomogeneous media; Numerical analysis; Pattern matching; Ultra wideband antennas; Ultra wideband technology; Coplanar waveguide; ultrawideband (UWB) antenna; ultrawideband (UWB) imaging;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2007.893405
