Title :
Experimental determination of attenuation in corrugated circular waveguides
Author :
Olver, A.D. ; Clarricoats, P.J.B. ; Chong, S.L.
Author_Institution :
Queen Mary College, University of London, Department of Electrical & Electronic Engineering, London, UK
Abstract :
The attenuation of the HE11 mode in a brass corrugated circular waveguide of internal diameter 8 cm is measured in the frequency range 8¿10 GHz by means of a resonant-cavity technique. Attenuation values of the order of 4 dB/m are observed. The mean attenuation level exceeds the theoretical value for a perfect corrugated waveguide by about 25%, which is within the experimental accuracy. The attenuation measured is substantially less than that predicted for the H11 mode in a smooth-wall waveguide of comparable size and is, in fact, close to that predicted for the H01 mode.
Keywords :
attenuation measurement; circular waveguides; guided electromagnetic wave propagation; microwave measurement; 8 to 10 GHz; ]; attenuation; attenuation measurement; circular waveguides; corrugated circular waveguide; guide electromagnetic wave propagation; microwave measurement; radiation characteristics; resonant cavity technique;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730310
