US 2018/0019722 A1 · Hybrid Coupler with Phase and Attenuation Control

Abstract

An RF hybrid coupler with phase and attenuation control that efficiently combines the functions of phase shifting and attenuation within a circuit. Embodiments include a hybrid coupler connected to parallel resistance-reactance (RX) circuits, where the reactance X may be a capacitor C or an inductor L; a hybrid coupler connected to parallel RX circuits (which may be variable), each of which is in turn series coupled to an inductive element L which corrects for attenuation range collapse while providing for fairly flat phase shift and attenuation performance as a function of frequency; and two hybrid couplers in a combined phase shifter and attenuator configuration, each with opposite frequency-dependent slopes and cascaded in series such that the slopes substantially cancel each other out, resulting in flat responses versus frequency.

Claims58

Dependent claims

A hybrid coupler with phase and attenuation control, including:

(a) a hybrid coupler having an RF input port, an RF output port, a first termination port, and a second termination port;
(b) a first parallel resistance-reactance circuit coupled between the first termination port and RF ground;
and
(c) a second parallel resistance-reactance circuit coupled between the second termination port and RF ground.

1 more element

Dependencies are inferred from the claim text.

Hybrid Coupler with Phase and Attenuation Control

Life of this patent

Hybrid Coupler with Phase and Attenuation Control

Life of this patent

Abstract

Claims58