Vol. 44

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2014-01-18

Wideband Unidirectional Bowtie Antenna with Pattern Improvement

By Jia-Yue Zhao, Zhi-Ya Zhang, Neng-Wu Liu, Guang Fu, and Shu-Xi Gong
Progress In Electromagnetics Research Letters, Vol. 44, 119-124, 2014
doi:10.2528/PIERL13122007

Abstract

A wideband unidirectional bowtie antenna with stable radiation patterns is proposed and investigated. It is fed by a wideband microstrip balun, using a coupling triangular structure to induce more balanced currents. Particularly, the corners of the conventional triangular bowtie dipole are rounded to achieve an impedance BW of 106.9% for |S11| ≤ -10 dB ranging from 1.97 GHz to 6.49 GHz. Additionally, a special small circular reflector between the ground plane and the bowtie dipole is used to stabilize the radiation patterns. The antenna achieves a stable gain of around 9.5 dBi with a little variation of 1.4 dBi and unidirectional radiation patterns over the whole operating band.

Citation


Jia-Yue Zhao, Zhi-Ya Zhang, Neng-Wu Liu, Guang Fu, and Shu-Xi Gong, "Wideband Unidirectional Bowtie Antenna with Pattern Improvement," Progress In Electromagnetics Research Letters, Vol. 44, 119-124, 2014.
doi:10.2528/PIERL13122007
http://jpier.org/PIERL/pier.php?paper=13122007

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