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Accounting impact of the multipactor discharge in a coaxial-waveguide transitions for space communication

DOI 10.18127/j00338486-201811-27


I.Sh. Bakhteev – Ph.D.(Eng.), Senior Engineer, NIKA-Microwave, Ltd (Saratov)
A.A. Dovgan – Senior Research Scientist, NIKA-Microwave, Ltd (Saratov)
A.S. Kondrashov – Ph.D.(Eng.), Deputy General Product Engineer, JSC «Russian Space Systems» (Moscow)
V.P. Meshchanov – Honored Scientist of RF, Dr.Sc.(Eng.), Professor, Director of NIKA-Microwave, Ltd (Saratov)
N.F. Popova – Ph.D.(Eng.), Deputy Director of NIKA-Microwave, Ltd (Saratov)
V.M. Rozhkov – Ph.D.(Eng.), Head of Department, JSC «Russian Space Systems» (Moscow)

This paper presents a method for calculating multipactor and corona discharges under reduced pressure, based on the addition of methods of numerical electrodynamic with equations describing the emission of electrons from the surface of metals and their diffusion in a gaseous medium. The advantages of this approach are expressed in greater accuracy in determining the threshold power levels of the onset of multipactor and corona discharges. This technique can be useful in the design of passive microwave components for space communication systems operating at elevated power levels.
Based on this technique, a numerical calculation of the coaxial-waveguide transition model for the WR229 channel with an operating frequency of 3.65 GHz was made. The obtained results showed the onset of a multipactor discharge at a power of more than 796 W, as well as the onset of a corona discharge with a minimum threshold power of 207 W at a reduced pressure of 4.5 mm Hg.

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May 29, 2020

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