Abstract
This paper focuses on design of simple rectangular microstrip patch antenna (RMSA) and gap coupled RMSA. A simple rectangular microstrip antenna is simulated initially with length 25.5mm and width 25.5mm of the patch. The length of the ground plane is 30mm and the width of the ground plane is 30mm. Four resonating frequency for simple RMSA are 5.21Ghz, 5.78Ghz, 7.09Ghz and 8.78Ghz with return loss −13.25dB, −19.80dB, −10.5dB and −14.79dB respectively. The length and width of both the patch in gap coupled RMSA is 25.5mm and 25.5mm respectively. The length and width of the ground plane is 30mm and 60mm respectively. Three resonating frequency for gap coupled RMSA is 5.42Ghz, 7.46Ghz and 8.73Ghz with return loss −15dB, −26.23dB and −14.6dB. Gain for simple RMSA at 5.21Ghz, 5.78Ghz, 7.09Ghz and 8.78Ghz is 1.9dBi, −0.56dBi, −0.84dBi and 1.37dBi respectively. Substrate used is flame retardant (FR-4). Gain of gap coupled RMSA at 5.42Ghz, 7.46Ghz and 8.73Ghz is 4.22dBi, 4.39dBi and 5.73dBi respectively. Height of substrate is 1.6 mm and loss tangent is 0.02. Software used for simulation is integral equation 3-dimensional (IE3D).
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