Eev Limited

Keith Squibb

An output of a magnetron operating in the TM.sub.01 /mode has a ceramic output window which is planar. As ceramic material may have a higher dielectric constant than glass a longer output probe can be used which, combined with the fact that the window is planar, gives good mode purity thus reducing heating and arcing in the window. Ceramic also has a higher melting point than glass which means that cooling of the window is less critical.

Magnetron having an TM.sub.01 output coupling probe passing through a

A magnetron is tuned by a co-axial transmission line co-axial with the axis of the magnetron and a radial transmission line linking the co-axial line to a plurality of sampling points symmetrically positioned on the end of the magnetron. A fraction of the R.F. power in the magnetron passes into the transmission lines and vice versa, so by altering the resonant frequency of the transmission lines the frequency of the RF power in the magnetron can be controlled.

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Chelmsford, United Kingdom

Keith Squibb