The invention relates to a surface-mounted
microwave circulator. The surface-mounted
microwave circulator comprises a shell and a cover plate on the shell. The shell is of a semi-open cylindrical cavity structure, the side wall of the shell is provided with three openings, a
gasket, a lower ferrite, a center conductor, an upper ferrite, a uniform-
magnetism conducting plate, a permanent
magnet and a temperature compensation plate are sequentially placed in the semi-open cylindrical cavity of the shell, the center conductor penetrates through the openings in the side wall of the shell to stretch out of the cavity, and columnar connectors are welded to the ends of the center conductor to form columnar connector ports. Through the design and
welding installation of the center conductor and the columnar connectors, the flatness of the columnar connectors and the flatness of the bottom of the
circulator can be automatically regulated. The single-
magnet magnetic circuit structure design is adopted in the permanent
magnet of the circulator. On the basis that the performance of a device is not changed by the packaging structure, the reliability of the
microwave circulator is obviously improved, and the
welding percent of pass is obviously increased. The circulator has the advantages of being small in size, good in performance, large in
power handling, wide in temperature range and the like.