Design and Analysis of Rectangular Microstrip Antenna with Defective Ground for UWB Applications
Keywords:
Slotted Microstrip Patch Antenna, Impedance Bandwidth, Radiation Pattern, Return LossAbstract
This paper presents two designs of rectangular microstrip patch antenna with defective ground plane. In the first proposed design, the geometry operates from 4.57 GHz to 7.91 GHz and provides impedance bandwidth of 53.6%, having stable pattern characteristics over the entire range. The second design is obtained by introducing changes in the shape of the slots in the ground structure in order to get notch in the bandwidth. The antenna operates at three resonant frequencies of 4.45 GHz, 7.32 GHz and 10.31 GHz. Both antennas are designed on a FR4 epoxy substrate of thickness 1.59 mm and relative permittivity of 4.4. and Ansoft HFSS 11 simulation software is used.
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