Bandwidth and gain enhancement of rectangular MSA by using parasitic patch and capacitive feeding technique for wideband application

A new wideband capacitive fed microstrip antenna using parasitic patch for wideband applications is proposed. The objective of the work is to design a wideband rectangular microstrip antenna for covering wireless Mobile Applications. To enhance the impedance bandwidth, capacitive gap-coupled mechanism has been proposed. The proposed antenna geometry describes a coplanar capacitive fed microstrip antenna printed over a FR4 substrate of thickness 1.6mm, air gap 9.0mm and permittivity r = 4.4. The capacitive feed strip used here is basically formed from a microstrip transmission line. The proposed antenna exhibits a much higher impedance bandwidth in the range of 1.49-2.45GHz an impedance bandwidth of 60.75% for return loss of less than 10dB. The proposed antenna possesses the bandwidth 960MHz with a good gain of 5.3dB overall the GPS (1575MHz) PCS (1900MHz), mobile (1800/1900MHz), UTMS (2100MHz) and Bluetooth (2400MHz) operation. HFSS high frequency simulator is employed to analyze the proposed antenna and simulated results on the return loss, VSWR, bandwidth and Gain of the proposed antenna are presented at various parasitic structure.