A dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators in stages, the resonator being filled with a dielectric material between its inner and outer conductors, comprising at least one stage in which the outer conductor of the .lambda./4 coaxial dielectric
A plurality of coaxial type dielectric resonators 1A, 1B each having a dielectric 5 filled between an inner conductor 4 and an outer conductor 3 a dielectric block 2 for capacitor coupling between resonators and between the resonators and input/output terminals. The dielectric block has
