TY - JOUR
T1 - Radiation and scattering from ferrite-tuned cavitybacked slot antennas
T2 - Theory and experiment
AU - Polycarpou, Anastasis C.
AU - Balanis, Constantine
AU - Aberle, James
AU - Birtcher, Craig
N1 - Funding Information:
Manuscript received October 2, 1997; revised June 12, 1998. This work was supported by the Advanced Helicopter Electromagnetics Industrial Associates Program and NASA Grant NAG-1-1082. The authors are with the Department of Electrical Engineering, Telecommunications Research Center, Arizona State University, Tempe, AZ 85287 USA. Publisher Item Identifier S 0018-926X(98)07053-7.
PY - 1998
Y1 - 1998
N2 - A three-dimensional finite-element method hybridized with the spectral/spatial domain method of moments is presented for the analysis of ferrite-tuned cavity-backed slot antennas. The cavity, which is partially filled with magnetized ferrite layers, is flush mounted on an infinite ground plane with possible dielectric or magnetic overlay. The antenna operates primarily in the ultrahigh-frequency band. The finite-element method is used to solve for the electric-field distribution inside the cavity, whereas the spectral-domain approach is used to solve for the exterior region. An asymptotic extraction of the exponential behavior of the Green's function followed by a spatial evaluation of the resulting integral is used to improve computational speed. Radar cross section, input impedance, return loss, gain, and efficiency of ferrite-tuned cavity-backed slots (CBS) are calculated for various biasing conditions. Numerical results are compared with experimental data.
AB - A three-dimensional finite-element method hybridized with the spectral/spatial domain method of moments is presented for the analysis of ferrite-tuned cavity-backed slot antennas. The cavity, which is partially filled with magnetized ferrite layers, is flush mounted on an infinite ground plane with possible dielectric or magnetic overlay. The antenna operates primarily in the ultrahigh-frequency band. The finite-element method is used to solve for the electric-field distribution inside the cavity, whereas the spectral-domain approach is used to solve for the exterior region. An asymptotic extraction of the exponential behavior of the Green's function followed by a spatial evaluation of the resulting integral is used to improve computational speed. Radar cross section, input impedance, return loss, gain, and efficiency of ferrite-tuned cavity-backed slots (CBS) are calculated for various biasing conditions. Numerical results are compared with experimental data.
KW - Ferrites
KW - Hybrid methods
KW - Slot antennas
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U2 - 10.1109/8.719973
DO - 10.1109/8.719973
M3 - Article
AN - SCOPUS:0032163071
SN - 0018-926X
VL - 46
SP - 1297
EP - 1306
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 9
ER -