Abstract: An electrical branching filter which includes two dielectric filters each containing, in a casing of metallic material, exciting means, exciting rod member and at least one dielectric resonator disposed between said exciting means and said exciting rod member, while the exciting rod members of the two dielectric filters are connected to each other through connecting means so as to form coupling means, with input and output connectors being respectively connected to a junction between said exciting rod members and to one end of each of said exciting means.

Abstract: There is disclosed a dielectric resonator which comprises a block of any desired shape prepared from any known dielectric material. The dielectric block has one or more apertures. The aperture in the dielectric block may be in the form of a through-hole or a cavity or blind-hole. In the case of employment of a pluraity of apertures in the dielectric block, they may be of the same size or of different size and of the same type of aperture or of different types of aperture. Various types of microwave filters using one or more dielectric resonators referred to above are also disclosed.