We propose a single vibration model, The state of the single vibration reflecting the reflector and repeatedly reciprocating was expressed for each step using the single vibration model, and the state of the whole mode was calculated by summing it. By repeating the reflection with the reflector, the energy of the vibration is stored between the reflectors. The formula can be expressed as the sum of the expansion formulas up to the nth order, but the final formula is described in detail so that it can be developed in an easy-to-understand form. And the effect of energy storage is shown in a graph in detail. This energy storage is a peculiar property of wave devices. The energy stored by reflection is stored in the increase in the applied voltage of the input electrode. This form of energy storage is formed by the repeated reflection of the waves and their sum.
Kazuyuki OUCHI (Wed,) studied this question.