Abstract: An input multiplexer, for which the high circuit order bandpass filters are connected by means of a low loss busbar of conducting pieces of optimized length into an IMUX.

Abstract: A busbar arrangement for coupling waveguide filters of output multiplexers wherein the side walls of short-circuited T-shaped or Y-shaped branch regions of the busbar are constructed for coupling the waveguide filters.

Abstract: The present invention provides a non-laser-active solid which is connected to a laser-active solid which has a reflective layer system and is cooled by a cooling member. Parallel isothermal planes are created in laser-active solid which are passed through by laser beam at a shallow angle. In this manner, a compact laser beam amplifier system is created which functions without a costly beam shaping optical system for semiconductor laser, and has a good beam quality even at high power.

Abstract: A waveguide switch having a stator and an electrically conducting movable element, the stator having waveguide paths between waveguide terminal pairs, each path being switchable to conducting or nonconducting with the help of the movable element for high-frequency waves. To permit lower requirements regarding manufacturing tolerances, the movable element is designed as a septum in a gap in the stator and extends in the waveguide path, which is switched to nonconducting, in parallel to its E plane. This divides the waveguide path into two partial waveguides, which run in parallel with one another and, in comparison with the switched-to-conducting state of the waveguide path, have smaller cut-off wavelengths.