Transient response of an open resonator in the time domain

In the present paper a time response of a quasi-optical open resonator when exciting it by a pulse signal with a radiofrequency filling has been investigated using an inverse Fourier transformation. The radiofrequency filling corresponds to millimeter wavelengths region. Fourier image of the time response of the resonator is calculated from a product of two frequency's functions. One of these functions is the Fourier image of a pulse signal at the resonator input, and the second is a calculated or measured amplitude - phase characteristic of the resonator. When calculating the amplitude- phase characteristic of the resonator (a complex transfer coefficient) a plane - layered model of the resonator was used.