Granted Patent B1

US 8,717,104 · App. 13/372,934 · Granted May 6, 2014

Abstract

Claims (24)

1. A system for compensating impedance mismatch at an output terminal of a power amplifier, the system comprising:

a plurality of samplers to measure a first set of parameters associated with an amplified signal being generated by the power amplifier; and

a processing unit to:

vary an impedance of an impedance element based on the first set of parameters, wherein the impedance element is connected to the output terminal of the power amplifier, and

calculate a second set of parameters associated with a transmission line based on the first set of parameters.

2. The system of claim 1 , wherein the amplified signal comprises a forward travelling signal and a reverse travelling signal.

3. The system of claim 2 , wherein the first set of parameters comprises a set of complex voltages associated with a linear combination of the forward travelling signal and the reverse travelling signal.

4. The system of claim 2 , wherein the second set of parameters include voltage amplitude of the forward travelling signal and reverse travelling signal.

5. The system of claim 1 , wherein each of the plurality of samplers correspond to a high impedance complex voltage sensing device.

6. The system of claim 1 , wherein the processing unit varies a gain of the power amplifier based on the first set of parameters.

7. The system of claim 1 , wherein the plurality of samplers and the impedance element are connected to the output terminal of the power amplifier through a transmission line.

8. The system of claim 1 , wherein the power amplifier is an RF power amplifier.

9. A method for compensating impedance mismatch at an output terminal of a power amplifier, the method comprising:

generating an amplified signal;

measuring a first set of parameters associated with the amplified signal;

varying an impedance of an impedance element, based on the first set of parameters, wherein the impedance element is connected to the output terminal of the power amplifier; and

calculating a second set of parameters associated with a transmission line based on the first set of parameters.

10. The method of claim 9 further comprising transmitting the first set of parameters to a processing unit.

11. The method of claim 9 further comprising generating an actuating signal based, at least in part, on the first set of parameters.

12. The method of claim 11 further comprising varying a gain of the power amplifier based on the actuating signal.

13. The method of claim 11 , wherein the actuating signal is generated based at least in part on the second set of parameters and the transmission line connecting the impedance element to the output terminal of the power amplifier.

14. The method of claim 13 , wherein the amplified signal comprises a forward travelling signal and a reverse travelling signal.

15. The method of claim 14 wherein the second set of parameters include a voltage amplitude of the forward travelling signal and reverse travelling signal.

16. The method of claim 14 , wherein the first set of parameters include a voltage magnitude associated with the forward travelling signal and the reverse travelling signal.

Assignments (9)