volume | PIER Journals

2014-01-18

Wideband Unidirectional Bowtie Antenna with Pattern Improvement

Jia-Yue Zhao,

Dr. Jia-Yue Zhao

National Laboratory of Antennas and Microwave Technology

Xidian University

China

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Zhi-Ya Zhang,

Dr. Zhi-Ya Zhang

School of Electronic Engineering

Xidian University

China

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Neng-Wu Liu,

Dr. Neng-Wu Liu

National Laboratory of Antennas and Microwave Technology

Xidian University

China

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Guang Fu,

Dr. Guang Fu

Xidian University

China

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Shu-Xi Gong

Prof. Shu-Xi Gong

Xidian University

China

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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.

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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

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