Abstract
2 ABSTRACT: This paper presents a novel design of partial ground plane rectangular microstrip antenna for dual band operation. The magnitude of each operating band is found to be 95% and 15.57%. This dual band can be converted into triple bands by placing a stub along the width of the rectangular patch on the right side from the microstripline. The magnitudes of triple bands are found to be 105%, 13.57% and 17.46%. However, the triple bands can be converted into dual bands by placing two stubs simultaneously along the width of the rectangular patch on left and right side of microstripline. The dual bands are merged with single band and antenna gives a highest impedance bandwidth of 137% with a gain of 6.59dB by increasing the length of the stubs from 2 mm to 4 mm. This operating frequency band of the antennas covers the frequency ranges used for WiMAX, WLAN, Bluetooth, IEEE 802.11a applications. When the length of the stubs is kept at 2 mm the antenna shows the property of notch band towards the higher side and for 8 mm towards the lower side of the frequency spectrum. The proposed antennas are simple in their structure and have been realized using low cost glass epoxy substrate material.
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