Experimental determination of attenuation in corrugated circular waveguides |
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| Authors: | Olver AD Clarricoats PJB Chong SL |
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| Affiliation: | Queen Mary College, University of London, Department of Electrical & Electronic Engineering, London, UK; |
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| 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. |
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