Abstract
In this paper, a compact and wideband open-slot circularly polarized antenna is proposed. The proposed antenna based on microstrip line fed inverted L-shaped radiator and modified ground plane. The ground plane is modified by incorporating an inverted L-shaped grounded strip and etched a rectangular portion from the lower right corner. Therefore, a wideband circular polarization(CP) coverage is obtained within a compact size. The magnitude and phase differences between the two field components (E X , E Y ) can be controlled effectively by properly tuning the dimensions of the horizontal section of the inverted-L shaped radiator. Which is helpful to minimize the axial ratio (AR) values (≤3dB) to widening the ARBW over the C-band. The overall dimensions of the prototype is only 22×22×1.6 mm3. The simulated impedance bandwidth (IBW) is 17.86% (5.15-6.16GHz) and a 3-dB AR bandwidth is 24.61% (5.06-6.48GHz). A peak gain of 3.8dB is achieved within the ARBW. The proposed antenna is suitable for circular polarization applications in C band.
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