Conference Proceeding

Efficient CAD of discontinuities between elliptical and circular waveguides

Ist. di Elettronica, Perugia Univ.
IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium 07/1998; DOI:10.1109/MWSYM.1998.700816 ISBN: 0-7803-4471-5 In proceeding of: Microwave Symposium Digest, 1998 IEEE MTT-S International, Volume: 3
Source: IEEE Xplore

ABSTRACT Elliptical waveguides are currently finding several applications,
since they provide Improved flexibility with respect to circular
waveguides and better manufacturability and higher Q with respect to
rectangular waveguides. Effective CAD of components involving elliptical
waveguides requires the efficient evaluation of the scattering
parameters at the discontinuity occurring between elliptical and
circular or rectangular waveguides. In this study we present analytical
formulas for the efficient CAD of a junction between a circular and an
elliptical waveguide of larger cross-section. With respect to current
approaches, based on the numerical evaluation of the coupling integrals,
the analytical formulas permit a significant reduction of computer time
of more than one order of magnitude. We have implemented the above
formulas and results have been tested against published data and
compared with those obtained by numerical integration: in all cases an
almost perfect agreement is observed

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Keywords

analytical formulas
 
circular
 
computer time
 
coupling integrals
 
discontinuity
 
Effective CAD
 
efficient CAD
 
efficient evaluation
 
elliptical
 
elliptical waveguide
 
Elliptical waveguides
 
formulas
 
higher Q
 
Improved flexibility
 
larger cross-section
 
perfect agreement
 
rectangular waveguides