volume | PIER Journals

2020-07-11

Design and Analysis of a Novel Miniaturized Dual-Band Omnidirectional Antenna for WiFi Applications

Ya-Bing Yang,

Dr. Ya-Bing Yang

Xidian University

China

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Fu-Shun Zhang,

Dr. Fu-Shun Zhang

Xidian University

China

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Yunqi Zhang,

Professor Yunqi Zhang

School of Electronic Engineering

Xi'an University of Posts & Telecommunications

China

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Xu-Ping Li

Dr. Xu-Ping Li

National Key Laboratory of Antennas and Microwave Technology

Xidian University

China

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Progress In Electromagnetics Research M, Vol. 94, 95-103, 2020

doi:10.2528/PIERM20050804 | Google Scholar

Abstract

In this article, a novel dual-band omnidirectional antenna for WiFi applications is presented and investigated. The proposed antenna is mainly composed of two pairs of half-wavelength dipoles with different lengths. It is fed by a microstrip balun, which provides a good impedance matching for desired dual-band operation. The dimension of the proposed antenna is only 50 mm × 10 mm × 1 mm (0.4λ₀ × 0.08λ₀ × 0.008λ₀, and λ₀ is the wavelength of 2.4 GHz). The performance study of this dual-band omnidirectional antenna with different geometric parameters has been conducted. The final design is fabricated and measured, and the results exhibit a good impedance bandwidth of approximately 19.2% for |S₁₁| ≤ -10 dB ranging from 2.24 to 2.70 GHz centered at 2.4 GHz, and over 17.4% for |S₁₁| ≤ -10 dB ranging from 4.73 to 5.6 GHz centered at 5.0 GHz. This antenna also has a stable gain of 2.09~2.87 dBi and omnidirectional radiation patterns over the whole operating band. Dual-band coverage, stable omnidirectional radiation performance, simple structure, and miniaturized dimension make this antenna an excellent candidate for WiFi applications.

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Ya-Bing Yang, Fu-Shun Zhang, Yunqi Zhang, and Xu-Ping Li, "Design and Analysis of a Novel Miniaturized Dual-Band Omnidirectional Antenna for WiFi Applications," Progress In Electromagnetics Research M, Vol. 94, 95-103, 2020.
doi:10.2528/PIERM20050804

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