Abstract
A circularly polarized (CP) slot antenna is implemented utilizing a Y-shaped radiating strip connected to a quarter wave microstrip feed line for better impedance matching. A parasitic strip, and an antipodal Y-shaped strip are used here to obtain wide axial ratio bandwidth. Utilizing of two optimized spring notches and a rectangular slit on the trapered slot ground plane enhanced circularly polarized radiation. The compact antenna (28 × 28 mm2; 0.277λ0 × 0.277λ0, λ0 is free space wavelength at 2.965 GHz) gives wide measured impedance bandwidth (IBW) from 2.965 to 13.461 GHz, center resonating frequency (fr ) 8.213 GHz, IBW 127.8% and a total of 10.496 GHz and measured wide CP band of 2.473 GHz (4.209–6.682 GHz, center CP resonating frequency (f cp) 5.445 GHz, 45.41%). The maximum measured peak gain of this antenna is 4.672 dBi at 6.5 GHz. Implemented antenna is suitable for some part of “S”, “C” and “X” band wireless communication applications.
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