Design procedure for a wideband high power multi-way SIW radial divider/combiner

ABSTRACT

In this paper, a wideband 12-way high power radial power divider/combiner is designed based on substrate integrated waveguide (SIW) technology. Broadband performance is achieved by using a stepped-core coaxial line at the central port and wideband SIW-to-grounded coplanar waveguide transitions at the radial ports. Due to the high power-handling capability of this structure, it is suitable for both power combining and power dividing applications. A prototype of the proposed combiner at X-band was designed, fabricated and tested. The measured insertion loss at output ports is approximately 10.7 ± 0.5 dB and the phase imbalance is ±1.8°. The isolation between the adjacent ports is better than 12.6 dB all over the X-band (40% bandwidth) and it can handle input power in the multi hundred-KW range (>266 KW), which is a huge advantage.

KEYWORDS:

• Substrate integrated waveguide (SIW)
• radial power divider
• wideband structure
• high power handling capability

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Robab Kazemi

Robab Kazemi (Member, IEEE) received the B.S. degree in electrical engineering from the Amir Kabir University of Technology (Tehran Polytechnic), Tehran, Iran, in 2004, and the M.S. and Ph.D. degrees in elctrical engineering-communications from the K. N. Toosi University of Technology, Tehran, in 2007 and 2012, respectively. From 2010 to 2011, she was a Visiting Research Scholar with the Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, TN, USA, where she was a Visiting Assistant Professor in 2013 and 2016. She is currently an Assistant Professor of electrical engineering with the University of Tabriz, Tabriz, Iran. Her current research interests include the design of passive microwave circuits, UWB antennas, antennas for medical applications, and electromagnetics.

Ali Hassanpour

Ali Hassanpour received the M.S. degree in electrical engineering-communications from the University of Tabriz, Tabriz, Iran in 2019.