Topology Optimization of Coaxial-to-WaveguideTransitions
(English)Manuscript (preprint) (Other academic)
We present a new approach to design widebandcoaxial-to-waveguide transitions. In order to maximize the match-ing between a coaxial cable and rectangular waveguides, theapproach decides for each point in a given domain whether tohold a good conductor or a good dielectric. The conductivity isoptimized by a gradient based optimization method that relieson finite-difference time-domain solutions to the 3D Maxwell’sequations. We present transitions with reflection coefficientslower than -15 dB over more than 60% bandwidth both for right-angle and end-launcher transitions. Each transition consists of adielectric substrate holding on one face an optimized conductivitydistribution. The introduced designs are easy to mass produceand require few assembly steps.
topology optimization, finite-difference time- domain (FDTD), adjoint-field problem, waveguides, coaxial cable, transitions design, end-launcher.
IdentifiersURN: urn:nbn:se:umu:diva-102577OAI: oai:DiVA.org:umu-102577DiVA: diva2:808372
submitted 2015 to IEEE transactions on microwave theory and techniques2015-04-282015-04-282015-04-29Bibliographically approved