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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 11    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 11, November 2011
Investigation on Octagonal Microstrip Antenna for RADAR & Space-Craft applications
Full Text(PDF, 3000)  PP.  
Krishan Kumar, Er. Sukhdeep Kaur
Directional patterns, finite ground plane, microstrip line feed, microstrip antenna, omni-directional patterns, ultra wideband (UWB)
In this paper octagon shape planar microstrip antenna is presented. Octagonal antenna can find applications in Radar and Space-crafts. The antenna is fed by a 50 O microstrip line and printed on a dielectric Fr4 substrate of dimension (22mm X 22 mm) permittivity er =4.4 and height h = 1.6 mm. The optimization on the planar octagonal microstrip has been done to accomplish an -10 dB return loss bandwidth. Moreover, in comparison with a simple rectangular shaped antenna, the proposed design enhances the bandwidth and improves input return loss. Better than 83.54 % radiation efficiency has been achieved in the range 3.1 to 15 GHz. The parameters like substrate dimension, feed size and ground plane which affect the performance of the antenna in terms of its frequency domain and time domain characteristics are investigated.
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