The resonance diaphragms are widely used in the antenna and microwave equipment as matching elements, filters, decoupling elements etc. As a rule the single-element resonance diaphragms or their serves along the direction of the wave propagation are used. Using the multielement resonance diaphragms may cause additional resonance couplings, changing the resonance frequency, matching the input and output of power electron microwave devices.

This paper focuses on the theoretical description of the wave propagation or excitation of oscillations in the resonance system with a limited number of the resonance diaphragms.