US 5,917,386 A · Printed circuit transformer hybrids for RF mixers

Abstract

A high frequency partial transformer hybrid includes a first divided circular conductive element affixed to one side of an insulated substrate and a second split circular conductive element affixed to the other side of the substrate juxtaposed to the first element. Plated-through holes in the substrate interconnect pads on the first and second elements. Connection tabs on the elements are adapted to be connected to conductors on a printed circuit board when the substrate is orthogonally supported in a rectangular recess in the substrate. In a transformer hybrid embodiment, a third continuous circular conductive element is supported on an additional substrate in alignment with and insulated from the second element. The third element also includes connection tabs that are connectable to the conductors on the printed circuit board.

Claims6

Dependent claims

In a wideband RF mixer of the type including symmetric inductive means having first second and third windings, means for coupling a symmetrical wideband RF signal to said first and second windings and means for deriving an IF signal from said third winding the improvement comprising:

said first and second windings comprising a first annular conductive element divided into first and second portions and a second annular split conductive element juxtaposed to said first element and separated therefrom by an insulating substrate, with said first and second portions being electrically interconnected with said second element;
a third annular continuous conductive element for said third winding;
and
an additional insulating substrate interposed between said second element and said third element.

1 more element

Dependencies are inferred from the claim text.

Printed circuit transformer hybrids for RF mixers

Life of this patent

Printed circuit transformer hybrids for RF mixers

Life of this patent

Abstract

Claims6