MICROWAVE BANDPASS FILTER Russian patent published in 2001 - IPC

FIELD: microwave devices; filtering high-power and high-frequency modes. SUBSTANCE: filter has 3-dB directional coupler, two absorbing loads, two Chebyshev rejection filters whose inputs are connected to working sides of directional coupler and outputs, to absorbing loads; device output is ballast side of directional coupler. Amplitude-frequency responses of two Chebyshev rejection filters are transformed into passband responses to ensure high steepness of amplitude-frequency response slopes and high-precision matching both in passband and in filter transmission band. EFFECT: minimized level of out-of-band radiation of miscellaneous radio-transmitting devices. 3 dwg