Fast Solution of Multiple Slot-Coupled Waveguide Junctions Using the CBFM
Journal article, 2015

A method for the fast analysis of a large number of waveguides coupled through rectangular apertures of arbitrary size and placement is presented. To enable the analysis of weakly excited slots, an accurate method-of-moments approach employing basis functions corresponding to a modal expansion of the electric field in the slot cavities is utilized, which includes both polarizations of the electric field at the slot apertures, as well as the transverse variation of the field across the slot. The characteristic basis function method (CBFM) reduces the memory requirements significantly and speeds up the computation, and is used to analyze a junction with two branch waveguides with very weakly excited slots, showing excellent agreement with the commercial FEKO software. The runtime of the program is considerably faster than FEKO for these geometries.

Microwave propagation

Waveguide slots


Moment method

Aperture admittance


Carl Toft

Chalmers, Signals and Systems

Rob Maaskant

Chalmers, Signals and Systems, Communication and Antenna Systems, Antennas

Johan Wettergren

Forum for Electromagnetic Research Methods and Application Technologies (FERMAT)

Areas of Advance

Information and Communication Technology

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

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