The Design of Multipole Filters for use in Millimetre Wave Image Line Integrated Circvits

The design of a class of filters for use in millimetre wave integrated circuits is described. These filters use resonant rings of dielectric image line, the theory of which is briefly described. The synthesis of the circuit elements necessary to realise the filter is explained and a practical tuning element is described. Several theoretical design examples are given and the results from an experimental filter are given.