The calculation and analysis of coupling impedance in resonance generators with O-type distributed interaction

Expressions are obtained for the effective volume for a quasi-optical and a cavity resonator having periodic structures in the form of a reflecting grating and a double diffraction grating. The derivation is based on a rigorous formulation of the internal boundary-value problem. This makes it possible to carry out a detailed, comparative, quantitative analysis of the natural oscillations of the electrodynamic systems over a range of frequencies. In addition, a series of practical recommendations is made for developig resonance generators with O-type elongate interaction.