Broadband feeding networks based on directional filters for two-beam antenna arrays

ABSTRACT

An alternative approach for the design of feeding networks designated for two-beam antenna arrays that ensure similar radiation patterns in a very broad frequency range has been proposed. The presented concept is based on directional filters that are utilized for smooth change of excitation signals of two broadband radiating elements and a broadband directional coupler used for ensuring quadrature excitations between two identical parts of the antenna arrays. The proposed concept has been confirmed by measurements of two-beams antenna arrays operating in frequency ratio f_H/f_L ≈ 2:1 and 3:1.

KEYWORDS:

• Multibeam antennas
• frequency-selective beamforming networks
• directional filters

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially granted by the National Science Centre Poland contract no. DEC-2011/03/D/ST7/01783 and in part by the Dept. of Electronics (under statutory research).

Notes on contributors

Kamil Staszek

Kamil Staszek received the MSc and PhD degrees in electronics engineering from the AGH University of Science and Technology, Cracow, Poland, in 2011 and 2015, respectively. He is currently with the Department of Electronics, AGH University of Science and Technology. His main research interests include multiport measurement techniques and design of the broadband passive components. He has coauthored more than 30 journals and more than 25 conference papers.

Slawomir Gruszczynski

Slawomir Gruszczynski received the MSc degree and the PhD degree in electronics and electrical engineering from the Wroclaw University of Technology, Poland, in 2001 and 2006, respectively. Since 2001 to 2006 he has been with Telecommunications Research Institute, Wroclaw Division. From 2005 to 2009, he worked at the Institute of Telecommunications, Teleinformatics and Acoustics, Wroclaw University of Technology. In 2009, he joined the Faculty of Informatics, Electronics and Telecommunications at AGH University of Science and Technology where he became a Head of the Department of Electronics in 2012. He has coauthored 42 journal and 56 conference scientific papers. He is a member of the IEEE, and a member of Young Scientists’ Academy at Polish Academy of Sciences (PAN) and Committee of Electronics and Telecommunications at Polish Academy of Sciences (PAN).

Krzysztof Wincza

Krzysztof Wincza received the MSc degree and the PhD degree in electronics and electrical engineering from the Wroclaw University of Technology, Poland, in 2003 and 2007, respectively. In 2007, he joined the Institute of Telecommunications, Teleinformatics and Acoustics, Wroclaw University of Technology. In 2009, he joined the Faculty of Electronics at AGH University of Science and Technology becoming an Assistant Professor. Dr Wincza was the recipient of The Youth Award presented at the 10th National Symposium of Radio Sciences (URSI) and the Young Scientist Grant awarded by the Foundation for Polish Science in 2001 and 2008, respectively. He has coauthored 42 journal and 56 conference scientific papers.