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Published June 2002 | Published
Book Section - Chapter Open

A millimeter-wave perpendicular coax-to-microstrip transition


A novel transition from coaxial cable to microstrip is presented in which the coax connector is perpendicular to the substrate of the printed circuit. Such a right-angle transition has practical advantages over more common end-launch geometries in some situations. The design is compact, easy to fabricate, and provides repeatable performance of better than 14 dB return loss and 0.4 dB insertion loss from DC to 40 GHz.

Additional Information

© 2002 IEEE. The authors wish to express their thanks to the staff of UltraSource Inc. for fabrication of the adapter and to Quinstar for machining the test block. Thanks are also due to Niklas Wadefalk of Caltech for laboratory assistance. The research described in this paper was carried out in part by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

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