Title :
EM-ANN modelling and optimal chamfering of 90/spl deg/ CPW bends with air-bridges
Author :
Watson, P.M. ; Gupta, K.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Abstract :
Electromagnetically-trained artificial neural network (EM-ANN) models for coplanar waveguide (CPW) 90/spl deg/ bends with air-bridges are presented. The optimal chamfer is determined for a conventional CPW bend where both the slot and strip are chamfered. Also, a novel compensated CPW bend is introduced where only the strip is chamfered. Optimum value of this chamfer is found to be the maximum chamfer allowed by air-bridge placement. This novel compensated CPW bend is shown to reduce the return loss from that in the conventional optimally chamfered CPW bend by 3 to 7 dB.
Keywords :
MMIC; circuit CAD; coplanar waveguides; integrated circuit design; integrated circuit modelling; neural nets; waveguide discontinuities; CPW bends; EM-ANN modelling; IC design; MMICs; air-bridges; coplanar waveguide bends; electromagnetically-trained artificial neural network; optimal chamfering; return loss; Artificial neural networks; Bridge circuits; Coplanar waveguides; Electromagnetic modeling; Electromagnetic waveguides; Insertion loss; MMICs; Optical waveguides; Scattering parameters; Strips;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.596668
