Patent ID: 6198912
Filing Date: 2001-03-06
Classification: H03D

Abstract:
Microwave frequency converter comprising:at least two adjacent rectangular cavities, respectively for a local oscillator signal and for a radio frequency signal, having an intercommunicating hole between said at least two adjacent rectangular cavities;a dielectric plate in the radiofrequency cavity on which a coplanar line is placed perpendicularly to the direction of arrival of the radiofrequency signal;at least two mixer diodes operatively connected to the coplanar line in the rectangular radiofrequency cavity, both diodes being illuminated by the radiofrequency signal;a coupler coupling, through said intercommunicating hole, the local frequency signal to a central metal strip of the coplanar line;a metal short-circuit plate closing the rectangular radiofrequency cavity at the bottom;two opposite walls of the rectangular radiofrequency cavity each provided with a central groove which extends up from the bottom to near the center of the rectangular radiofrequency cavity, and into which the dielectric plate, having a surface substantially orthogonal to the direction of arrival of the radiofrequency signal, is inserted and two outer metal strips of said coplanar line are welded to the cavity walls.