Antenna compensation system and method in a communications device

• US 20070232367A1
• Filed: 03/31/2006
• Published: 10/04/2007
• Est. Priority Date: 03/31/2006
• Status: Active Grant

• Current Assignee: Silicon Laboratories Incorporated
• Original Assignee: Silicon Laboratories Incorporated
• Inventors: Vancorenland, Peter, Rafi, Aslamali, Kasha, Dan
• Granted Patent: US 8,369,906 B2
• Time in Patent Office: Days
• US Class Current: 455/574
• CPC Class Codes: H04B 1/0458 Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages matching circuits in general H03H

Abstract

A communications device is provided. The communications device includes an antenna port, transmitter circuitry configured to broadcast a radio frequency (RF) output signal across the antenna port, and a controller configured to adjust a signal level of the RF output signal in accordance with antenna compensation information. The antenna port, the transmitter circuitry, and the controller are at least partially integrated on the same integrated circuit.

Claims

1. A communications device comprising:

an antenna port;

transmitter circuitry configured to broadcast a radio frequency (RF) output signal across the antenna port; and

a controller configured to adjust a signal level of the RF output signal in accordance with antenna compensation information;

wherein the antenna port, the transmitter circuitry, and the controller are at least partially integrated on the same integrated circuit.

2. The communications device of claim 1 wherein the controller is configured to access the antenna compensation information within the communications device.

3. The communications device of claim 1 wherein the controller is configured to receive the antenna compensation information from a user.

4. The communications device of claim 1 wherein the controller is configured to adjust the signal level of the RF output signal according to a frequency of the RF output signal.

5. The communications device of claim 1 wherein the controller is configured to increase the signal level of the RF output signal for a first frequency of the RF output signal, and wherein the controller is configured to decrease the signal level of the RF output signal for a second frequency of the RF output signal that differs from a first frequency.

6. The communications device of claim 1 wherein the controller is configured to adjust the signal level of the RF output signal subsequent to completing a calibration mode of operation.

7. The communications device of claim 1 wherein the controller is configured to adjust tuning circuitry coupled to the antenna port during the calibration mode of operation.

8. The communications device of claim 1 wherein the transmitter includes output stage circuitry configured to generate the the RF output signal using an intermediate signal, and wherein the controller is configured to adjust the signal level of the RF output signal by providing a first control signal to the output stage circuitry.

9. The communications device of claim 8 wherein the output stage circuitry includes adjustable level circuitry coupled to a transconductance amplifier and configured to receive the control signal.

10. The communications device of claim 8 wherein the transmitter includes driver circuitry configured to generate the intermediate signal and provide the intermediate signal to the output stage circuitry, and wherein the controller is configured to adjust a signal level of the intermediate signal by providing a second control signal to the driver circuitry.

11. A method performed by a controller in a communication device with transmitter circuitry, the method comprising:

accessing antenna compensation information associated with an antenna coupled to an antenna port of the communications device; and

adjusting a signal level of a radio frequency (RF) output signal generated by the transmitter circuitry in accordance with antenna compensation information.

12. The method of claim 11 further comprising:

adjusting the signal level of the RF output signal by increasing the signal level.

13. The method of claim 11 further comprising:

adjusting the signal level of the RF output signal by decreasing the signal level.

14. The method of claim 11 further comprising:

adjusting the signal level of the RF output signal in accordance with a frequency of the RF output signal.

15. The method of claim 11 further comprising:

accessing the antenna compensation information within the communications device.

16. The method of claim 11 further comprising:

receiving the antenna compensation information from a user

17. The method of claim 11 further comprising:

adjusting the signal level of the RF output signal subsequent to completing a calibration mode of operation.

18. A communication device comprising:

an antenna port coupled to the antenna;

transmitter circuitry including adjustable level circuitry and configured to broadcast a radio frequency (RF) output signal across the antenna port; and

a controller configured to provide a first control signal to the adjustable level circuitry to cause a signal level of the RF output signal to be adjusted using antenna compensation information;

wherein the antenna port, the transmitter circuitry, and the controller are at least partially integrated on the same integrated circuit.

19. The communications device of claim 18 wherein the transmitter circuitry includes a transconductance amplifier, and wherein the adjustable level circuitry is coupled to the transconductance amplifier and is configured to receive the first control signal.

20. The communications device of claim 19 wherein the transmitter circuitry includes driver circuitry configured to generate an intermediate signal and provide the intermediate signal to the transconductance amplifier, and wherein controller is configured to provide a second control signal to the driver circuitry to cause the signal level of the intermediate signal to be adjusted.

21. The communications device of claim 20 wherein the driver circuitry includes RF conditioning circuitry, and wherein the RF conditioning circuitry is configured to receive the second control signal.

22. The communications device of claim 18 wherein the controller is configured to cause the signal level of the RF output signal to be adjusted according to a frequency of the RF output signal.

23. A communications system comprising:

an antenna;

a communications device including;

an antenna port coupled to the antenna;

transmitter circuitry configured to broadcast a radio frequency (RF) output signal across the antenna port; and

a controller configured to adjust a signal level of the RF output signal in accordance with antenna compensation information;

wherein the antenna port, the transmitter circuitry, and the controller are at least partially integrated on the same integrated circuit; and

an input/output system configured to communicate with the communications device.

24. The communications system of claim 23 wherein the controller is configured to access the antenna compensation information within the communications device.

25. The communications system of claim 23 wherein the communications device is configured to receive the antenna compensation information from a user.

26. The communications system of claim 23 wherein the controller is configured to adjust the signal level of the RF output signal according to a frequency of the RF output signal.