DocumentCode :
1002975
Title :
A leaky-wave antenna using an artificial dielectric medium
Author :
Bahl, I.J. ; Gupta, K.C.
Author_Institution :
Indian Institute Technology, Kanpur, India
Volume :
22
Issue :
1
fYear :
1974
fDate :
1/1/1974 12:00:00 AM
Firstpage :
119
Lastpage :
122
Abstract :
A narrow-beam antenna using an artificial dielectric medium with effective permittivity less than unity has been investigated theoretically and experimentally. Complex propagation constant for a wave propagating along the structure is evaluated by solving the dispersion relation. The analysis indicates the presence of a leaky-wave mode. The radiation pattern is calculated by using Kirchhoff-Huygens integration method. Experimental results for an antenna of this type designed for operation at 
band are reported and compared with theoretical calculations. Beam position varies from 
to 
when the frequency is changed from 8.6 to 11.5 GHz. Over this frequency range the half-power beamwidth varies from 
to 
. An expression for the half-power beamwidth of a leakywave antenna of finite length has been derived and discussed in the Appendix.
band are reported and compared with theoretical calculations. Beam position varies from to when the frequency is changed from 8.6 to 11.5 GHz. Over this frequency range the half-power beamwidth varies from to . An expression for the half-power beamwidth of a leakywave antenna of finite length has been derived and discussed in the Appendix.Keywords :
Artificial dielectric materials/devices; Leaky-wave antennas; Antennas and propagation; Dielectrics; Dispersion; Frequency; Geometry; Leaky wave antennas; Propagation constant; Refractive index; Tellurium; Wires;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1974.1140715
Filename :
1140715
Link To Document :
