Back to results
US 6,600,307 B2Granted
Method and apparatus for measuring true transmitted power using a broadband dual directional coupler
AssigneeSarnoff Corporation
InventorsZygmond Turski, Bernard Dov Geller
Life of this patent
Estimating the term…
Abstract
A dual-directional coupler for measuring true RF power apparent at a radiating element. Incident and reflected power are detected by a pair of detectors. The difference between the two detected voltages is amplified by a differential amplifier to generate a voltage proportional to the true transmitted power.
Claims18
An apparatus for generating an output signal representative of a true transmitted power at a radiating element coupled to an RF feed line, comprising:
- an RF coupling section, formed on a substrate proximate the RF feed line, for coupling RF power incident at the radiating element and RF power reflected at the radiating element;
- a first detector, mounted to the substrate and coupled to the RF coupling section, for providing a first voltage representative of the RF power incident at the radiating element;
- a second detector, mounted to the substrate and coupled to the RF coupling section, for providing a second voltage representative of the RF power reflected at the radiating element;
- and
- a differential amplifier, mounted to the substrate and coupled to the first detector and the second detector, for combining the first voltage and the second voltage to provide an output signal indicative of a true transmitted power at the radiating element.
2 more elements
In a cellular telephone having a radiating element coupled to an RF feed line mounted to a printed circuit board, a dual-directional coupler comprising:
- a substrate mounted to the printed circuit board proximate the RF feed line;
- a coupling section, attached to said substrate, and positioned parallel to said RF feed line, for coupling RF power incident at the radiating element and RE power reflected at the radiating element from the RF feed line;
- and
- a differential amplifier coupled to the coupling section for combining the RF power incident at the radiating element and the RF power reflected at the radiating element to provide an output signal indicative of a true transmitted power at the radiating element.
1 more element
Dependencies are inferred from the claim text.