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Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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SINGLE-FEED TRIPLE-BAND CIRCULARLY POLARIZED SPIDRON FRACTAL SLOT ANTENNA

By T. N. Thi, S. Trinh-Van, G. Kwon, and K. C. Hwang

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Abstract:
In this paper, the design of a single-feed triple-band circularly polarized Spidron fractal slot antenna is presented. The proposed antenna is composed of a Spidron fractal slot, a Z-shaped slit, and two L-shaped slits to realize triple-band circular polarization operation. A simple 50 Ω microstrip line is utilized to feed the proposed antenna. A conducting reflector is also used to reduce back radiation, thereby enhancing the forward antenna gain. The proposed antenna has total dimensions of 40.7 mm × 40.7 mm × 18.52 mm (0.42λ × 0.42λ × 0.19λ) and was fabricated and tested. The experimental results show that the proposed antenna has -10 dB reflection coefficient bandwidths from 2.76 GHz to 3.13 GHz and from 3.56 GHz to 6.22 GHz. The measured 3 dB axial ratio bandwidths are 2.28% (3.04-3.11 GHz) for the lower band, 7.15% (4.18-4.49 GHz) for the middle band, and 2.6% (4.93-5.06 GHz) for the upper band. The peak gains within the -10 dB reflection coefficient bandwidths are 3.41 dBic and 6.29 dBic, respectively.

Citation:
T. N. Thi, S. Trinh-Van, G. Kwon, and K. C. Hwang, "Single-Feed Triple-Band Circularly Polarized Spidron Fractal Slot Antenna," Progress In Electromagnetics Research, Vol. 143, 207-221, 2013.
doi:10.2528/PIER13090501
http://www.jpier.org/PIER/pier.php?paper=13090501

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