Abstract
A compact and circularly polarized microstrip patch antenna design has been proposed for wideband applications. The proposed circularly Polarized Microstrip Patch Antenna with multiple nodes will transmit at frequencies between 5.7 and 6.7 GHZ. The rectangular slots in the patches are used as parasitic elements, which raises the frequency ranges of the antenna. The designed metallic patch has small and complex structure of dimensions 30 x 25 mm. The ground plane with parasitic elements which is known as defected ground plane structure is introduced in the proposed wideband antenna design to increase its performances. The transmission line with defected ground plane structure gives higher effective impedance with the voltage standing wave ratio of value 1. For the uniform substantial distance, a microstrip line with DGS has longer electrical length than a traditional microstrip line. As a result, the DGS aids in the lowering of resonance. This antenna reveals a minimum return loss or S11 of -27 dB and a maximum gain value of 5 dB with suitable radiation pattern which is applicable for wideband applications.
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