Abstract: An electrical phase shifting circuit element of the reflection type including a quadrature coupler branch network, a matched pair of selectively coupled transmission lines and an electrical switching element corresponding to each pair of transmission lines, all being separated distributively from each other and a ground plane by a dielectric material, is disclosed. One end of one transmission line of each pair is connected to a corresponding phase splitting port of the quadrature coupler and another end of the other transmission line of each pair is coupled to the switching element which is preferably a pin diode. The pin diodes may be governed by a common switching signal to electrically connect and disconnect the another ends of the other transmission lines to the ground plane.

Abstract: A T-shaped rectangular waveguide branching filter includes an electrically conductive projection or protrusion of approximately triangular cross section which is formed at a predetermined portion within the branching filter for preliminary impedance matching of a predetermined accuracy as observed from each of the input/output ports of the branching filter, and an electrically conductive rod which may be selectively advanced toward or retracted from the first input/output port and extends through the electrically conductive protrusion of triangular cross section so that, by selectively advancing or retracting the conductive rod, a particular impedance match corresponding to each of the input/output ports as observed from any one of the input/output ports may be achieved for efficiently deriving the signal applied to one of the input/output ports from either one of the other input/output ports.

Abstract: A four port magic tee device has three ports defined by an H arm and two parallel side arms which meet at a common junction of the device, and has a fourth (E) port at the junction. Extending over the fourth port is a section of waveguide which acts as a coupling and matching structure by providing a chamber which is coupled to that port. That arrangement enables the E arm of the magic tee device to be reduced to zero length, if desired. In contrast, the E arm of a conventional magic tee of comparable performance must be of some finite length.

Abstract: The present invention provides a polarization coupler which is capable of coupling or separating dual linear polarized microwave signals having frequencies which extend over extremely wide frequency bands. The present polarization coupler (11) comprises a main waveguide (12) and a side-arm waveguide (13) with a plurality of septa (16) arranged at the junction to reflect energy of a first polarization (E.sub.1) between the main and side-arm waveguide while energy of a second polarization (E.sub.2) passes the junction unaffected.

Abstract: A linear accelerator for generating a beam of charged particles accelerated within a wide energy range without modifying the microwave energy injected into the accelerator structure, this accelerator structure comprising a bunching section and an accelerating section respectively constituted by a plurality of resonant cavities, the cavities of the bunching section being electromagnetically coupled in such a manner that two adjacent cavities are phase-shifted of .pi. one with respect to the other, these bunching and accelerating sections being respectively supplied by a microwave generator delivering a microwave signal w divided, by means of a combined coupler and phase shifter, into two microwave signals w.sub.1, w.sub.2 respectively injected into the accelerating and bunching sections with predetermined amplitudes and phases.