The electroforming of components and instruments for millimetre wavelengths

An account is given of the use of electroforming techniques as an accurate and economical method for the manufacture of waveguide components and instruments. Particular reference is made to those for millimetre wavelengths, but some of the techniques can, with advantage, be applied to those for the centimetre wavebands. The development of improved methods and processes, including periodic-reverse-current plating, is described. Methods of manufacture using both permanent and disposable formers are discussed and especial attention is given to the design of the electroformed pieces for ease of subsequent machining. Examples of this technique are given and some electrical and mechanical data are quoted.