US 4,361,821 A · Capacitor coupling arrangement for UHF resonant structure

Abstract

Precise capacitive coupling to a coil is provided by a coil form having a central winding portion for a coil and having transverse flanges at the ends of the winding portion. The flanges are shaped and dimensioned to fit in a structure or resonant cavity, and have facing grooves for receiving and holding a sheet of insulating material in a plane substantially parallel to the coil winding portion. A metallic plate of predetermined size and location is positioned on the insulating sheet, and provided with a connection to an external circuit. The metallic plate provides capacitive coupling to a coil wound on the winding portion. This coupling is of predetermined magnitude and repeatable consistency, since identical coil forms can be made to hold their respective insulating sheets and metallic plates in the same location.

Claims11

Dependent claims

An improved coil and capacitor assembly for use in ultrahigh frequency radio circuits and the like comprising:

a. an insulating form extending along an axis for receiving a coil;
b. first and second insulating flanges positioned at opposite ends of said form, each of said flanges having a groove positioned on a surface at corresponding facing locations that are equally spaced from said axis;
c. an insulating member positioned in and extending between said grooves;
d. a metallic plate positioned on said insulating member on a surface thereof facing said insulating coil form to provide capacitive coupling;
e. and means for connecting said metallic plate to an external circuit.

2 more elements

Dependencies are inferred from the claim text.

Capacitor coupling arrangement for UHF resonant structure

Life of this patent

Capacitor coupling arrangement for UHF resonant structure

Life of this patent

Abstract

Claims11