Title :
Scattering by a lossy dielectric cylinder in a rectangular waveguide
Author :
Gesche, Roland ; Löchel, Norbert
Author_Institution :
Dept. of Theor. Electr. Eng., Tech. Univ. of Darmstadt, West Germany
fDate :
1/1/1988 12:00:00 AM
Abstract :
Electromagnetic fields in a rectangular waveguide containing a lossy dielectric cylinder are investigated by means of the orthogonal expansion method. The calculated results are provided by measurement. Resonance effects become visible through the frequency responses of the scattering parameters and understandable by patterns due to magnetic fields and Poynting vectors. The lowest resonance is nonsymmetric and can be used to realize tunable bandstop filters with a relative 3-dB bandwidth of about 0.04 and an attenuation of more than 40 dB
Keywords :
S-parameters; dielectric-loaded waveguides; electromagnetic field theory; frequency response; rectangular waveguides; waveguide theory; EM fields; Poynting vectors; S-parameters; frequency responses; lossy dielectric cylinder; magnetic fields; orthogonal expansion method; rectangular waveguide; scattering parameters; tunable bandstop filters; Dielectric losses; Dielectric measurements; Electromagnetic fields; Electromagnetic measurements; Electromagnetic scattering; Electromagnetic waveguides; Frequency; Magnetic field measurement; Magnetic resonance; Rectangular waveguides;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
