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ULTRA-WIDEBAND (UWB) DIFFERENTIAL-FED ANTENNA WITH IMPROVED RADIATION PATTERNS

By J. H. Wang and Y.-Z. Yin

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Abstract:
This study proposes a differential-fed microstrip antenna, which is characterized with an ultra-wideband of 120% (3-12 GHz), improved radiation patterns, stable gains, and compact size. Two symmetrical trapezoid shaped slots and four triangle-cut corners on the ground are used to improve the impedance matching over the UWB frequency band. To clarify the improved radiation characteristics, the simulated radiation patterns of the proposed antenna are compared with the conventional single-ended feed UWB antennas. The measured results show that, in the entire frequency band, the designed antenna exhibits a stable radiation patterns and the gain variation is less than 2 dB. Furthermore, the polarization purity are increased compared with the conventional ones, especially in the high frequency band.

Citation:
J. H. Wang and Y.-Z. Yin, "Ultra-Wideband (UWB) Differential-Fed Antenna with Improved Radiation Patterns," Progress In Electromagnetics Research C, Vol. 53, 1-10, 2014.
doi:10.2528/PIERC14060801

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