Dielectric Wafer Filters in Waveguide

Filters comprising dielectric wafers in TE10 mode rectangular, and TE01 mode circular or semi-circular waveguides are described. Their suitability for use in overmoded guides and for high power levels is explained. Design procedures and a computer optimisation process are formulated which allow wafers of standard thickness to be used. Examples of applications in a band-branching unit for a circular waveguide millimetric communications system, and a high power diplexer are given. Good agreement between computed and measured results has been obtained and constructional details and performance figures are presented.