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Frequency dependent capacitive - inductive model for axially coupled π/2 standing wave biperiodic structures

In the paper the axially coupled π/2 biperiodic, standing wave accelerating structure is analysed. Two models for chain coupled cavities are considered, firstly the model with inductive coupling between the cavities and secondly the capacitive-inductive model with frequency dependence of the coupling element. It is shown by comparison with experimental results, that the second model is better suited to describe dispersion relation of the structure. Calculation methods of the parameters of dispersion curves for both types of coupling are given together with experimental results.