US 5,801,600 A · Variable differential phase shifter providing phase variation of two output signals relative to one input signal

Abstract

A variable differential phase shifter is provided. The device provides a continuous variation in phase between two outputs derived from a single input. The device is suitable for application at signal frequencies around 900 MHz, and is constructed in the form of an inner (38) and outer (37) sleeve capacitively coupled to an inner conductive rod (24) and outer conductive tube (26) respectively, wherein the inner (38), and outer (37) sleeves are connected to an input and can be moved in fixed relative relation thereby varying the phase relationship between the two outputs which are connected to the inner rod (24) and outer tube (26). A dielectric layer (25 and 27) may be provided around the inner rod (24) and outer tube (26). An unequal power division version of the device is provided for by the inclusion of a dielectric tube surrounding a portion of the inner rod.

Claims20

Dependent claims

A variable differential phase shifter comprising:

a coaxial line comprising an inner conductive rod and an outer conductive tube coupled at ends thereof to first and second outputs;
an inner sleeve capacitively coupled to the inner conductive rod and slideable therealong;
and
an outer sleeve capacitively coupled to the outer conductive tube and slideable therealong;
the inner and outer sleeves being connected to an input and being slideable along said coaxial line in fixed relationship relative to each other to vary the phase relationship of the signals output at the first and second outputs with respect to a signal supplied to the input.

2 more elements

Dependencies are inferred from the claim text.

Variable differential phase shifter providing phase variation of two output signals relative to one input signal

Life of this patent

Variable differential phase shifter providing phase variation of two output signals relative to one input signal

Life of this patent

Abstract

Claims20