University of Oulu

Marko Sonkki, Sami Myllymäki, Jussi Putaala, et al., “Dual Polarized Dual Fed Vivaldi Antenna for Cellular Base Station Operating at 1.7–2.7 GHz,” International Journal of Antennas and Propagation, vol. 2017, Article ID 1304359, 8 pages, 2017.

Dual-polarized dual fed vivaldi antenna for cellular base station operating at 1.7-2.7 GHz

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Author: Sonkki, Marko1; Myllymäki, Sami2; Putaala, Jussi2;
Organizations: 1Centre for Wireless Communications (CWC), University of Oulu, Oulu, Finland
2Microelectronics Research Unit, University of Oulu, Oulu, Finland
3Nokia Networks, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.1 MB)
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Language: English
Published: Hindawi, 2017
Publish Date: 2018-07-05


The paper presents a novel dual polarized dual fed Vivaldi antenna structure for 1.7–2.7 GHz cellular bands. The radiating element is designed for a base station antenna array with high antenna performance criteria. One radiating element contains two parallel dual fed Vivaldi antennas for one polarization with 65 mm separation. Both Vivaldi antennas for one polarization are excited symmetrically. This means that the amplitudes for both antennas are equal, and the phase difference is zero. The orthogonal polarization is implemented in the same way. The dual polarized dual fed Vivaldi is positioned 15 mm ahead from the reflector to improve directivity. The antenna is designed for 14 dB impedance bandwidth (1.7–2.7 GHz) with better than 25 dB isolation between the antenna ports. The measured total efficiency is better than 0.625 dB (87%) and the antenna presents a flat, approximately 8.5 dB, gain in the direction of boresight over the operating bandwidth whose characteristics promote it among the best antennas in the field. Additionally, the measured cross polarization discrimination (XPD) is between 15 and 30 dB and the 3 dB beamwidth varies between 68° and 75° depending on the studied frequency.

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Series: International journal of antennas and propagation
ISSN: 1687-5869
ISSN-E: 1687-5877
ISSN-L: 1687-5869
Volume: 2017
Pages: 1 - 8
Article number: 1304359
DOI: 10.1155/2017/1304359
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by Finnish Funding Agency for Innovation and Nokia Networks.
Copyright information: Copyright © 2017 Marko Sonkki et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.