A FREQUENCY DEMULTIPLEXER

摘要

A frequency demultiplexer comprising an input part (106) with an input port (101), a low pass filter (125) and a band-pass filter (108) with output ports (120, 145). The input part (106), the low-pass filter (125) and the band-pass filter (108) comprise open waveguide sections, and the band-pass filter (108) comprises gap-coupled resonators (130, 135, 140). The input part (106) and the low-pass filter (125) connect to the same resonator (130), the connection (121) of the low-pass filter (125) being at a first maximum distance (L1) from a centre point (N) of the resonator and the connection (116) of the output port (101) being at a second maximum distance (L2) from said centre point (N) of the resonator. The centre point (N) corresponds to a wave node of a wavelength λ, where λ=2 d/M, M is a positive integer value and d is the shortest end-to-end distance along the resonator.

主权项

1. A frequency demultiplexer comprising an input part (106) with an input port (101), a low pass filter (125) with an output port (120), and a band-pass filter (108) with an output port (145), with the input part (106), the low-pass filter (125) and the band-pass filter (108) comprising open waveguide sections, and the band-pass filter (108) comprising a plurality of gap-coupled resonators (130, 135, 140), with the input part (106) and the low-pass filter (125) both being connected at respective connection points (116, 121) to one and the same of said gap-coupled resonators (130), the connection point (121) of the low-pass filter (125) being located at a first maximum distance (L1) from a centre point (N) of the resonator and the connection point (116) of the input part (106) being located at a second maximum distance (L2) from said centre point (N) of the resonator, said centre point (N) corresponding to a wave node of a wavelength λ, where λ=2 d/M, M is a positive integer value and d is the shortest end-to-end distance along the resonator.