University of Oulu

M. Sonkki, D. He, Z. Siddiqui, M. E. Leinonen and K. Guan, "Wideband Dual-Polarized Patch Antenna with Capacitive Coupling for mm-Wave Bands," 2020 14th European Conference on Antennas and Propagation (EuCAP), Copenhagen, Denmark, 2020, pp. 1-4, doi: 10.23919/EuCAP48036.2020.9135634

Wideband dual-polarized patch antenna with capacitive coupling for mm-Wave bands

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Author: Sonkki, Marko1; He, Danping2; Siddiqui, Zeeshan1;
Organizations: 1Centre for Wireless Communications (CWC), University of Oulu, Oulu, Finland
2State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, China
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2020-11-13


This paper presents a planar wideband dual-polarized antenna structure integrated on PCB (Printed Circuit Board). The patch itself is fed by a capacitive coupling with two smaller patches, one for each polarization. Whereas the simulations predicts 24–40 GHz, -10 dB impedance bandwidth. The measured one shows 24.75–42.75 GHz bandwidth. The results are corresponding to 50% relative -10 dB impedance bandwidth. The patch antenna is on the ground plane of size 4.7 mm x 4.7 mm, and the corners of the ground plane are cut to gain better XPD (cross polarization discrimination). The manufactured prototype antenna is measured and simulated with a 50 Ω coaxial line. Simulated total efficiency and XPD are presented as a function of frequency. The total efficiency is better than -0.8 dB (83%) efficiency, whereas the simulated XPD is better than 14 dB. The simulated 3D radiation patterns are presented at 24 GHz, 32 GHz, and 40 GHz with gains of 2.8 dBi, 5.0 dBi, and 4.3 dBi, respectively.

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ISBN: 978-88-31299-00-8
ISBN Print: 978-1-7281-3712-4
Pages: 1 - 4
Article number: 19766742
DOI: 10.23919/EuCAP48036.2020.9135634
Host publication: 2020 14th European Conference on Antennas and Propagation (EuCAP)
Conference: European Conference on Antennas and Propagation
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work has been supported by Academy of Finland project “Antenna Design at mm-Waves and Highly Directive Lens Antenna Simulations for sub-THz Band by Using Ray Tracing Platform” (grant no. 323857), and the National Natural Science Foundation of China project “mmWave Antenna Array Design for Wireless Channel Sounding” (grant no. 61911530771). The work is partly supported by the Academy of Finland project 6Genesis Flagship (grant no. 318927).
Academy of Finland Grant Number: 323857
Detailed Information: 323857 (Academy of Finland Funding decision)
318927 (Academy of Finland Funding decision)
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