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In this paper, a CPW-fed compact antenna with tri-band reject characteristics is presented and experimentally verified. A curved ground plane is introduced to enhance the bandwidth to 250 MHz. The sectoral patch antenna has a T-strip and Y-slot to reject WLAN (4.78 ∼ 5.68 GHz) and WiMAX (3.385 ∼ 3.97 GHz), respectively. L-strips are placed in the ground plane to increase the bandwidth as well as the plane to reject uplink satellite frequency in the X-band (7.93 ∼ 8.74 GHz). In all notch bands, high VSWR values are observed. The structure is compact with a size of 15 × 12 × 0.8 mm3. To study the effect of strip/slot on VSWR, parametric analysis is done. The notch frequency is theoretically calculated by an empirical formula. The measured result validates the simulated and calculated notch frequencies. [ABSTRACT FROM AUTHOR]

This paper proposes a co-planar waveguide-fed circularly polarized L-band antenna for GNSS Applications. The Fibonacci series inspired us to decide the physical dimensions of the radiating structure. The proposed antenna with the dimensions of 60 × 40 × 0.8 mm3 is fabricated by etching out several slots from the patch and ground plane as well. The circular polarization (CP) behavior is observed from different shaped slots in the ground plane as well as in radiating patches. The experimental and simulation results revealed good agreement over the entire operating frequency range. [ABSTRACT FROM AUTHOR]