A Low-Profile Hybrid-Fed Dual-Polarized Antenna with High Isolation and High Cross-Polar Discrimination

Authors

  • M. Ciydem Dept. of Electrical and Electronics Engineering, Faculty of Engineering Gazi University, 06570 Maltepe, Ankara, Turkey
  • E. A. Miran Dept. of Electrical and Electronics Engineering, Middle East Technical University, 06520 Balgat, Ankara, Turkey

Keywords:

5G base station, cross-polar discrimination, dual-polarization, hybrid feeds, isolation, low-profile, massive MIMO, sub-6 GHz, wideband patch antenna

Abstract

This work presents a wideband hybrid-fed ±45º linear dual-polarized patch antenna design for sub- 6 GHz 5G base stations. Two polarizations are created by a slot-coupling with rectangular H-slot (+45) and a capacitive coupling with modified L-probe (−45). Antenna exhibits wideband −10 dB impedance bandwidths of 40.7% and 35.6% for slot-fed and probe-fed ports, respectively. Due to the special design of suspended stacked patches with hybrid-fed excitations, high port isolation (< −47 dB) and high cross-polar discrimination (> 38 dB) are achieved. Symmetric and directional radiation patterns with stable gain are obtained in E and H planes for each polarization. Compared to its bandwidth, antenna is low-profile (10.6 mm) with front-to-back ratio greater than 22 dB. Simulations and experimental results are reported and discussed.

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Author Biographies

M. Ciydem, Dept. of Electrical and Electronics Engineering, Faculty of Engineering Gazi University, 06570 Maltepe, Ankara, Turkey

Mehmet Ciydem was born in 1971 in Ankara, Turkey. He received his B.Sc., M.Sc. and Ph.D. degrees all in Electrical Engineering from Middle East Technical University (METU), Ankara, Turkey with high honors. After working in defense industry (Aselsan, Havelsan, TAI) for many years, he founded Engitek Ltd. company in 2009 where he is President. He is an Associate Professor of electromagnetic theory and communications lecturing occasionally in several universities (Bilkent Univ., Gazi Univ., Karatay Univ., Hacettepe Univ., and Army War Academy). His research interests are in the areas of electromagnetics, wave propagation, antennas, RF/ microwave engineering, radar and communication systems.

E. A. Miran, Dept. of Electrical and Electronics Engineering, Middle East Technical University, 06520 Balgat, Ankara, Turkey

Emre A. Miran was born in Izmir, Turkey in 1990. He received the B.S. degree in Electrical and Electronics Engineering from Dokuz Eylul University, Izmir, Turkey, in 2012. He is currently pursuing the Ph.D. degree in Electrical and Electronics Engineering Department at Middle East Technical University (METU), Ankara, Turkey. He was Teaching/Research Assistant at Micro/mm-wave Research Laboratory between 2012-2017. Then, he joined Engitek Ltd. as a Senior RF/Antenna Design Engineer. His research interest mainly includes the fields of electromagnetics, antenna design, RF system design, and radar imaging.

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Published

2021-11-06

How to Cite

[1]
M. . Ciydem and E. A. . Miran, “A Low-Profile Hybrid-Fed Dual-Polarized Antenna with High Isolation and High Cross-Polar Discrimination”, ACES Journal, vol. 36, no. 09, pp. 1164–1172, Nov. 2021.

Issue

2021: Vol 36 Iss 9

Section

Articles