PURPOSE: To realize miniaturized a antenna multicoupler satisfying a desired performance even if a different no-load Q is required by making the length of one side of dielectric resonators being components for a transmission filter and a reception filter nearly equal to each other in both the resonators for the transmission filter and the reception filter and adopting a different interval of the resonators from those for the transmission filter and the reception filter.

CONSTITUTION: The input/output coupling is realized by the capacitance between conductor patterns 46 and 47, and between 47 and 50 on a dielectric base 44 and the inter-stage coupling is realized by the capacitance between conductor patterns 47 and 48 between 48 and 49 and between 45 and 50, and the length of one side is the same as that of the transmission filter, and the length of the other sides is varied in response to the required no-load Q, square dielectric resonators hot causing any waste space are combined to form the capacitor coupling type filter. That is, the square type dielectric resonator is adopted, where the length of one side is the same for both the transmission and reception filters and the length of the other sides is varied in response to the required no-load Q for the transmission and reception filters so as to obtain a miniaturized antenna multicoupler.