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Bandwidth and Gain Improvement of a Circularly Polarized Dual-Rhombic Loop Antenna

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bandwidth issues

Overview This paper presents a novel way to improve the performance of a Circularly Polarized (CP) dual-rhombic loop antenna. The bandwidth is enhanced by adding a pair of parasitic rhombic loops inside the dual-rhombic loop while the gain is increased with the help of a short backfire antenna. Good impedance matching is obtained by introducing a broadband balun. The addition of the parasitic elements leads to a bandwidth of 46% for axial ratio (AR) Â¡Ãœ2 dB with an impedance bandwidth of 50% for VSWRÂ¡Ãœ2. The dual-rhombic loop excited short backfire antenna achieves an AR (Â¡Ãœ3 dB) bandwidth of 45% with an antenna gain of 11 dBi.

Further White Paper Details
Publisher	Georgia Institute of Technology	File Format	PDF
Date Published	February 2006
Format	White Papers
Topics	Bandwidth Issues, Broadband

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