The waveguide-planar transition comprises a hollow metal tube of rectangular section, part of which, adjacent to its first end, forms a rectangular waveguide, and part, adjacent to its second end, serving as a screen of a micro-strip line, comprising a dielectric plate located between the wide walls of said pipe in parallel to its narrow walls with thin metal conductors located on its front and back sides; a conductor disposed on the reverse side of the dielectric plate starting from the boundary; located at a distance from the first end of the pipe to the second end of the pipe; is continuous and shortens its wide walls and forms an earthen electrode and a boundary of a micro-strip line; conductor on the front side of the dielectric plate from the above boundary to the second end of the pipe forms a signal conductor of the micro-strip line. The conductor on the front side of the dielectric plate from the above boundary to the second end of the pipe forms a signal conductor of the microsband line, the conductor on the front side of the dielectric plate is extended from the above boundary of the microsband line towards the first end of the pipe at a distance of the order of 0.3 from the wavelength at the central frequency of the working frequency band of the transition. The conductor on the back side of the dielectric plate continues in the same direction and coincides with the projection of the conductor on the front side of the dielectric plate on its back side, and two identical L-shaped probes directed oppositely towards opposite wide walls of the pipe are connected to the ends of the said extended conductors, the extremities of which are located along the axis of the pipe in the direction towards the said boundary of the microstrip line.
The utility model refers to monolithic circuits of hybrid-integral devices of centimeter and millimeter wavelength ranges. Transitions of this type are usually used as part of communication devices, radar, etc., made by hybrid-integral technology.
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