propagation delay time adjuster for circular waveguides

摘要

1527691 Waveguide delay equalizer COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT - ALCATEL SA 17 Jan 1977 [3 Feb 1976] 10758/77 Heading H1W A delay equalizer for a circular waveguide, to compensate for the greater velocity of higher frequency wave components, comprises a series connection of identical delay equalizer elements, each consisting of input and output circular waveguides 2, 4 connected at an angle, preferably a right angle, progressive reflectors 6, 8 aligned with the waveguides 2, 4 and connected to their junction, the reflectors tapering from the diameter of the waveguides 2, 4 so that higher frequency components entering therein travel farther before reflection and are delayed more, and a semi-reflecting plate 10 inside the junction and disposed symmetrically to the waveguides 2, 4, the plate reflecting half of the incident energy, and transmitting half with a quarter-wavelength phase shift. Any waves returning along the input 2 are out of phase and cancel, whereas those in the output 4 are in phase. The delay equalizer elements may be connected in a rectangular spiral stack arrangement (see Fig. 2, not shown).