A high-frequency filter using a dielectric resonator includes an insulating substrate on which an input linear conductor and an output linear conductor are formed in parallel to each other, and a dielectric resonator which is coupled to the substrate. The dielectric resonator is arranged so that the direction of the center magnetic field of the dielectric resonator becomes approximately parallel to the substrate and becomes approximately at right angles to the linear conductors. With such an arrangement, a high-frequency filter, in which fine adjustment of a coupling factor and a resonance frequency is easy while maintaining Q of the dielectric resonator to be high, whose size can be reduced, and which can be mounted inexpensively is provided.

High-frequency filter

Filter miniaturization is achieved by utilizing a dielectric resonator as the resonant circuit in each individual filter of a multichannel microwave filter bank. The filter circuits are mutually isolated and compactly stored in a multiple compartment filter housing structure. The housing structure consists of a center conductor, multiple conductive sheet members spaced transversely along the center conductor and multiple conductive sheet members parallel to and radiating from the center conductor. All conductive sheet members are interlocked to form a multiplicity of individual compartments that envelope the center conductor. The center conductor and the proximal edges of the parallel conductive sheet members define a coaxial microwave transmission line from which input microwave signal energy is coupled by means of coupling loops or probes to each individual filter circuit.

Lammers Uve H W

Papers

Multichannel microwave filter