M. Veereshappa and Dr. S.N Mulgi
A simple square slots loaded unipolar rectangular microstrip antenna is proposed for quad-band operation. The proposed antenna is simple in its geometry and has been constructed from conventional rectangular microstrip antenna by loading four equal slots with same dimensions on the radiating patch. A ground plane of height equal to the length of microstripline on the top and bottom surface of the substrate is used. The quad bands are achieved between 4 to 16 GHz with ominidirectional radiation characteristics. The antenna also rejects the interference signals gives peak a gain of 11.96 dB in its operating band. The antenna is simple in its geometry and easy to fabricate. The proposed antenna may find application in microwave communication systems.
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