Available technologies, Electrical and Electronic components, Engineering, Information and communications technology (ICT), Telecommunication


A real-time tunable power splitter based on RGW works from 14 GHz to 22 GHz and can tune the power division ratio from 50/50 to 75/25

The challenge in microwave power splitters/ dividers      

  • Microwave power splitters have been used for a long time in microwave engineering to split a microwave signal into equal or unequal portions for several applications such as reconfigurable antenna systems, phased array radar
  • Reconfigurability of antenna arrays is crucial for several millimeter wave applications
  • Reconfigurable switch/splitter/combiner is introduced using Ridge Gap Waveguide (RGW) which has emerged as a preferred waveguide technology for millimeter wave frequencies
  • Reconfigurable power dividers are usually done using printed technology and using diodes. They require at least 2 fixed dividers/combiners and 2 variable phase shifters, requiring ferrites which are expensive and lossy. This increases the cost of the variable power divider and the space it requires
  • Most of the reconfigurable power dividers in the market are working at frequencies below 12 GHz and are using microstrip technology
  • There is a need for a wider bandwidth, compact in size, lower in losses and simpler reconfigurable power splitter/divider

New design of reconfigurable power splitter using RGW technology

  • This invention offers a 3-port reconfigurable power divider which can reconfigure the power-split-ratio during operation using Ridge Gap Waveguide technology
  • This splitter can also work as a wideband waveguide switch (ON/OFF) with high resolution
  • The splitter depends on using a flat metallic sheet between two RGWs and controlling the sheet deflection using a mechanism integrated in the pins regions where the electromagnetic fields are negligible
  • The splitter achieves a flat 3 dB power splitting from 14 GHz to 22 GHz and can tune the power division ratio from 50/50 to 75/25
  • The power split ratio may be changed with matching level better than 15 dB on the same band when a force acts on the sheet ends
  • This technology was developed by Prof. Ahmed Kishk and Mohamed Nasr (Electrical and Computer Engineering, Concordia University)

Competitive advantages

  • Wideband, with a bandwidth percentage of more than 40%), that can operate in harsh environments because of the metallic waveguide
  • Lossless since no diodes, dielectric substrates or ferrite are needed for it to operate
  • Usable as a low insertion loss waveguide switch since it can achieve power-split-ratios from 50 dB to -50 dB
  • Compact and cheaper than its counterparts in the market since it doesn’t cascade several devices to achieve variable power division

Market applications 

Telecom systems:

  • Reconfigurable beamforming networks
  • Reconfigurable antenna systems
  • Phased array radar
  • High-efficiency power amplification

Business opportunity

  • Technology available for licensing
  • Provisional patent application filed


If you are interested by this technology, please contact :
Dareen Toumi, Technology Analyst, Engineering
dtoumi@aligo.ca, (514) 618-9297


Concordia University

Main inventors


Ahmed Kishk, Professor, Electrical and Computer Engineering

Prof. Ahmed Kishk received the M.Eng. and Ph.D. degrees from the Department of Electrical Engineering, University of Manitoba, Winnipeg, MB, Canada, in 1983 and 1986, respectively. In 1981, he joined the Department of Electrical Engineering, University of Manitoba. He was the Chair of the Physics and Engineering Division, Mississippi Academy of Science, Jackson, MS, USA, from 2001 to 2002. Since 2011, he has been the Trier 1 Canada Research Chair in Advanced Antenna Systems. He is currently a Professor with Concordia University, Montréal, QC, Canada. Dr. Kishk was a Distinguish Lecturer of the Antennas and Propagation Society from 2013 to 2015. From 1990 to 1993, he was an Associate Editor of the IEEE Antennas and Propagation Magazine. He was an Editor of the IEEE Antennas and Propagation Magazine from 1993 to 2014. He was a Co-Editor of the “Special Issue on Advances in the Application of the Method of Moments to Electromagnetic Scattering Problems” of the ACES Journal. He was also an Editor and the Editor-in-Chief of the ACES Journal in 1997 and from 1998 to 2001, respectively


Mohamed Nasr, Researcher, Electrical and Computer Engineering

Dr. Nasr received the B.Sc. (Hons.) and M.Sc. degrees in electronics and communications engineering from Cairo University, Giza, Egypt in 2010 and 2014, respectively, and the Ph.D. degree in electrical and computer engineering from Concordia university, Montreal, QC, Canada in 2019. From 2011 to 2015, he was teaching and research assistant with Electronics and Communications Department in Cairo University. From 2015 to 2019, he was teaching and research assistant with Concordia University. His research interests include reconfigurable beamforming networks, passive microwave devices, computational techniques in electromagnetics and inverse scattering techniques. Dr. Nasr is the recipent of Schlumberger award of excellence, Concordia entrance and accelerator awards in 2008, 2015 and 2019 respectively.

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