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IMPROVEMENTS IN A HIGH GAIN UWB ANTENNA WITH CORRUGATED EDGES

By Z. Wang and H. Zhang

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Abstract:
In this paper, a novel corrugated structure at the edges of the Vivaldi substrate is presented. Compared with the Vivaldi antenna without corrugated structure, the new structure has a better radiation pattern. While compared with the traditional corrugated structure, the new structure has a better front-to-back ratio (F/B ratio). Properly chosen thickness and dielectric constant of substrate ensure a relatively small size while the lower frequency is around 1 GHz. A Vivaldi structure also promises high gain in ultra-wideband (UWB) range. For its planar structure, the antenna is easily fabricated with a low cost. The design of a novel Vivaldi antenna described in this paper operates from 1 GHz to more than 3 GHz with -10 dB return loss and produce the gain with a range of 7 dBi~11 dBi. The current design is one of the most ideal antennas to be used for through-wall radar.

Citation:
Z. Wang and H. Zhang, "Improvements in a High Gain UWB Antenna with Corrugated Edges," Progress In Electromagnetics Research C, Vol. 6, 159-166, 2009.
doi:10.2528/PIERC09011404
http://www.jpier.org/pierc/pier.php?paper=09011404

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