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Progress In Electromagnetics Research C
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WIDEBAND CIRCULARLY POLARIED CROSS BOWTIE DIPOLE ANTENNA WITH AXIAL-RATIO BANDWIDTH ENHANCEMENT

By D. Wu, Z.-Y. Zhang, L. Ji, L. Yang, G. Fu, and X.-W. Shi

Full Article PDF (1,740 KB)

Abstract:
A wideband circularly polarized (CP) cross-dipole antenna is proposed for wireless applications. In this design, four parasitic square patches are utilized around the radiation patch to enhance the Axial-ratio (AR) bandwidth. By employing the bowtie-shape dipoles, the proposed antenna can achieve a wide impedance bandwidth. Meanwhile, by integrating with a curved-delay line which provides a 90° phase difference, the proposed antenna can radiate a CP pattern. A prototype is calculated, fabricated, and measured. Good agreement between the simulated and measured results is achieved. The measured results show an impedance bandwidth for VSWR≤2 of 47.73% (1.93-3.14 GHz) and a 3-dB AR bandwidth of 42.8% (2.00-3.09 GHz).

Citation:
D. Wu, Z.-Y. Zhang, L. Ji, L. Yang, G. Fu, and X.-W. Shi, "Wideband circularly polaried cross bowtie dipole antenna with axial-ratio bandwidth enhancement," Progress In Electromagnetics Research C, Vol. 72, 65-72, 2017.
doi:10.2528/PIERC17011503
http://www.jpier.org/pierc/pier.php?paper=17011503

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