Title :
Improvement in calculation of some surface integrals: application to junction characterization in cavity filter design
Author :
Guillot, Philippe ; Couffignal, Patrick ; Baudrand, Henri ; Theron, Bernard
Author_Institution :
Lab. d´´Electron., ENSEEIHT, Toulouse, France
fDate :
12/1/1993 12:00:00 AM
Abstract :
A rigorous method which makes it possible to reduce a surface integral to a contour integral is developed. The application of this formulation to the study of a circular-to-rectangular waveguide junction reduces the time of computation of the scattering parameters by more than 50%. The method is used to calculate the electromagnetic coupling of circular cavities by a rectangular iris. This approach, together with an optimization procedure, has allowed the direct design of a filter without any further mechanical adjustments. The results obtained are in good agreement with experimental data
Keywords :
S-parameters; cavity resonators; integral equations; microwave filters; optimisation; passive filters; waveguide couplers; cavity filter design; circular cavities; circular-to-rectangular waveguide junction; contour integral; electromagnetic coupling; junction characterization; optimization procedure; rectangular iris; scattering parameters; surface integrals; Electromagnetic coupling; Electromagnetic fields; Electromagnetic waveguides; Filters; Iris; Rectangular waveguides; Surface waves; Transmission line matrix methods; Waveguide discontinuities; Waveguide junctions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
