Wideband Quasi-Yagi Antenna with Broad-Beam Dual-Polarized Radiation for Indoor Access Points

Authors

  • Son Xuat Ta School of Electronics and Telecommunications Hanoi University of Science and Technology, Ha Noi, Viet Nam
  • Cong Danh Bui Faculty of Electrical and Electronics Engineering Ton Duc Thang University, Ho Chi Minh City, Vietnam
  • Truong Khang Nguyen 2 Division of Computational Physics, Institute for Computational Science Ton Duc Thang University, Ho Chi Minh City, Vietnam 3 Faculty of Electrical and Electronics Engineering Ton Duc Thang University, Ho Chi Minh City, Vietnam

Keywords:

Balanced directors, beamdwidth, cavitybacked reflector, dual polarization, microstrip-slotline transformer, quasi-Yagi antenna

Abstract

This paper presents a wideband, broad beamwidth, dual-polarized antenna for the indoor access points. Its primary radiating elements are two quasi-Yagi antennas, which are arranged orthogonally. The antenna element employs two balanced directors to broaden bandwidth and avoid the structural conflict of the orthogonal installation. A microstrip-slotline transformer is used in the feeding structure for allowing the wideband operation and high port-to-port isolation. The dualpolarized quasi-Yagi antenna is incorporated with a metallic cavity in order to improve the unidirectional radiation in terms of gain, front-to-back ratio, and beamwidth. The final prototype has been fabricated and tested. The antenna yielded a wide impedance bandwidth covering a frequency range from 1.64 to 3.0 GHz (60%) for both ports with port-to-port isolation of a higher than 25 dB. In addition, at both ports, the antenna achieves stable unidirectional radiation with broad beamwidth, high front-to-back ratio, and high radiation efficiency.

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Published

2019-05-01

How to Cite

[1]
Son Xuat Ta, Cong Danh Bui, and Truong Khang Nguyen, “Wideband Quasi-Yagi Antenna with Broad-Beam Dual-Polarized Radiation for Indoor Access Points”, ACES Journal, vol. 34, no. 05, pp. 654–660, May 2019.

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