Coaxial hybrid junction device having impedance matched terminations

Claim 1

In a coaxial hybrid junction device of the type having an outer conductor, a pair of center conductors extending side-by-side within the outer conductor for a distance of approximately a quarter wavelength lambda (-)/4, where lambda is the wavelength at the mean frequency in the operational band of the device, the side-by-side conductors being insulated one from the other, an insulative member lining the interior of the outer conductor for the quarter wavelength distance, the insulative lining member having a central longitudinal apertuRe in which the side-by-side conductors are situated, the insulative sleeve being thick compared to the insulation between the center conductors, and coaxial connectors mounted on the outer conductor, each coaxial connector having its center pin connected to a different end of the center conductors, the improvement comprising plugs positioned in the outer conductor at opposite ends of the lining member, each plug being connected to the outer conductor and being at the same electrical potential therewith, each plug having two channels in it diverging from the central aperture in the adjacent end of the lining member and providing a slanting passage from the central aperture in the lining member to a different one of the coaxial connectors, and the center conductor connected to each coaxial connector extending through a different one of the slanting channels to form a coaxial line which provides an electrically smooth path for coupling signals into and out of the hybrid junction.