Multipactor Threshold Comparative Study Between Groove Gap and RectangularWaveguide Technologies
This paper presents a comparative study of the
different multipactor thresholds obtained in Rectangular Waveguide
(RW) and Groove Gap Waveguide (GGW) technologies.
Firstly, a technique developed by the authors has been used
to analyse theoretically the multipactor level in RWs. Results
have been compared with those from an available commercial
software, obtaining negligible differences. Second, by using an
accurate electron tracking code, the breakdown power levels in
the equivalent GGW have been predicted, showing a reduction
of the multipactor power threshold. Third, two aluminum WR-
90 symmetric E-plane RW transformers, one of them with the
central section in GGW technology, have been designed and
their multipactor breakdown power levels have been predicted
at five different frequencies. Finally, both transformers have been
manufactured and tested in an extensive multipactor campaign.
The measured results agree well with simulations, thereby fully
validating the obtained results.