406 Broadband Microstrip Antennas
Pr |
radiated power |
S |
side length of the triangular patch |
s |
gap spacing |
tan d |
loss tangent |
t |
conductor thickness |
W |
width of the rectangular patch |
We |
effective width of the rectangular patch |
Wi , Wj |
i th and j th port widths |
w |
width of the microstrip line, stub or slot |
x |
feed point |
Z ij |
multiport impedance matrix |
Z in |
input impedance |
Z 0 |
characteristics impedance |
Z 0 ( f ) |
frequency-dependent characteristic impedance |
b |
propagation constant |
DL |
edge extension in length |
DW |
edge extension in width |
D |
air gap |
eo |
free-space permitivity |
ee |
effective dielectric constant |
ee ( f ) |
frequency-dependent effective dielectric constant |
eeq |
equivalent dielectric constant for two layers |
er |
dielectric constant |
h |
efficiency |
h0 |
free-space impedance |
l |
wavelength in dielectric |
l0 |
free-space wave length |
m 0 |
free-space permeability |
m r |
permeability of the material |
f |
azimuthal angle |
u |
elevation angle |
v |
angular frequency |
About the Authors
Girish Kumar received a Ph.D. in electrical engineering from the Indian Institute of Technology (IIT) in Kanpur, India, in 1983. From 1983 to 1985, he was a research associate at the University of Manitoba in Winnipeg, Canada. From 1985 to 1991, he was an assistant professor in the electrical engineering department at the University of North Dakota in Grand Forks, North Dakota. Since 1991, he has been in the electrical engineering department at IIT in Bombay, India, where currently he is a professor. His research interests are in the areas of MSAs and arrays, broadband antennas, MICs, and EMI/EMC. He has successfully completed much research and sponsored projects in these fields. He has published more than 100 papers in journals and conference proceedings. Dr. Kumar is a senior member of the IEEE and a fellow of IETE, India.
K. P. Ray received an M. Tech. in microwave electronics from University of Delhi, South Campus, Delhi, India, in 1985. He joined SAMEER in Mumbai, India, in the same year and has been working on the design of different types of antenna elements and arrays, the high-power generation of RF and microwaves, and other microwave components and systems. He received a Ph.D. from the electrical engineering department of IIT in Bombay, India, in 1999; his thesis was in the field of MSAs. He has been a visiting faculty member at IIT in Bombay, and has been deputed to GTRI in Atlanta, Georgia, under the UNDP program. He has published more than 50 research papers in journals and conference proceedings. Currently, he is the head of the RF and microwave power system division in SAMEER. He is a member of the IEEE, a fellow of the IETE, and a life member of the Instrument Society of India.
