Abstract
Due to their smaller size and light weighted structures patch antennas are accustomed in modern communication Technology. With additional size in reduction, micro strip antennas are commonly used in handsets, GPS receivers etc. This paper presents a novel design of fractal shape patch antenna using U-slot on patch and defected ground structure. Due to slots on patch and ground, tri-band resonating response is attained with maximum gain and directivity of 4.22dB and 6.51dBi showing high impedance bandwidth and radiation efficiency. The antenna showed good VSWR of 1.63 to 1.02 thus, showing high efficiency. As evident in the simulation results, the proposed antenna has been found useful for W-LAN, GSM, Radio Satellite, Fixed Satellite Services (RSS) & (FSS) and satellite communication systems.
Highlights
The increasing demand of wireless communication and multimedia services has resulted in growing efforts of designing and accomplishment of micro strip patch structures due their cost efficiency and small size
Length of slot is 6mm and width of the slot is 1mm. to further reduce size and for efficient frequency response defected ground structure technique is used by adding U and H slot on a ground plane as shown in fig 2 and figure 3
The dimensions of conventional patch antenna with the central resounding frequency of 3.346GHz would require dimensions of 27.94×21.00=585 mm2 while as for proposed design, only by dimensions of 16x21= 361mm2 it is achieved, resulting in shrinking the size up to 61.70%, which is more significant than formerly published methodologies
Summary
The increasing demand of wireless communication and multimedia services has resulted in growing efforts of designing and accomplishment of micro strip patch structures due their cost efficiency and small size. Applications of such antennas comprise but not restricted to personal communication systems, military applications, jets aircrafts and much more. Several techniques have been proposed to reduce the patch antenna size but at the cost of lower gain, lower directivity and reduced bandwidth. In this paper we have proposed a miniaturized fractal shape patch antenna with u-slots on patch and defected ground structure with good impedance bandwidth, gain and directivity. The proposed antenna is showing multi frequency response which can be used for various applications systems
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