An Ultra-Wideband Circularly Polarized Asymmetric- $S$ Antenna With Enhanced Bandwidth and Beamwidth Performance

An Ultra-Wideband Circularly Polarized Asymmetric- $S$ Antenna With Enhanced Bandwidth and Beamwidth Performance

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chicago cubs earrings This paper introduces an ultra-wideband circularly polarized (CP) asymmetric-S antenna with wide axial ratio beamwidth (ARBW) for C-band applications.The proposed antenna is realized by bending a linearly polarized dipole into asymmetric-S shape with variable trace width, which achieves CP radiation.Unlike the reported symmetric-S antenna, the proposed antenna is constituted with two unequal curved arms to enhance the bandwidth and beamwidth performances.Compared with the symmetric-S antenna, the proposed antenna demonstrates much wider AR bandwidth and wider ARBW over broader frequency range.A prototype is fabricated to verify the design principle.

The measured and simulated results are very consistent and both indicate that the proposed antenna has a wide impedance bandwidth (VSWR <; 2) of 70.2% (3.58 to 7.46 GHz), and a wide 3-dB AR bandwidth of 84.8% (2.

75 to 6.8 GHz).Moreover, maximum ARBW of 153° is achieved, Jeans and a 3-dB ARBW of more than 100° is maintained within a wide operation bandwidth of 46.3% (3.65-5.

85 GHz).