Radio frequency power amplifier control device

Patent metadata

Field	Value
Publication number	US-11863219-B2
Application number	US-202117453167-A
Country	US
Kind code	B2
Filing date	Nov 1, 2021
Priority date	Aug 20, 2019
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

The present disclosure relates to a radio frequency power amplifier (RFPA) control device. The RFPA control device may include an input signal processing module configured to process an input signal into two signals. A first signal may be used for signal detection, and a second signal may be used for signal amplification. The RFPA control device may also include a delay module. The delay module may be disposed between the input signal processing module and an adjustment module. The delay module may be configured to determine a delay of the second signal such that the second signal and the control signal roughly simultaneously reach the adjustment module.

First claim

What is claimed is:

1. A control device for a radio frequency power amplifier, coupled to a radio frequency power amplification module of the radio frequency power amplifier via a signal connection, the control device comprising:
an input signal processing module, configured to obtain, based on an input signal, a first signal for generating a control signal and a second signal for signal amplification;
a signal processing and control module configured to obtain the control signal based on the first signal;
an adjustment module configured to adjust the second signal based on the control signal; and
a delay module configured to delay a transmission of the second signal to the adjustment module, wherein
the signal processing and control module is further configured to impose an adjustable delay on the control signal to adjust a moment that the control signal reaches the adjustment module.

2. The control device of claim 1 , wherein the signal processing and control module includes:
an input signal detection sub-module configured to detect at least one feature of the first signal; and
a signal processing and control sub-module configured to generate the control signal based on the at least one feature of the first signal.

3. The control device of claim 2 , wherein the control signal is configured to control a degree of the adjustment of at least one feature of the second signal.

4. The control device of claim 3 , wherein the signal processing and control sub-module is configured to:
obtain an amplification function that is nonlinear of the radio frequency power amplification module;
determine, based on the amplification function, a correction function; and
generate the control signal by determining the degree of the adjustment of the at least one feature of the second signal based on the correction function.

5. The control device of claim 2 , wherein the input signal detection sub-module includes at least one of a detector, a diode, or a phase discriminator.

6. The control device of claim 1 , wherein:
the input signal processing module includes one of a power divider configured to divide the input signal into the first signal and the second signal, and a couper configured to extract a portion of signal from the input signal as the first signal.

7. The control device of claim 1 , wherein the adjustment module is configured to implement a nonlinear correction of the radio frequency power amplification module by adjusting at least one feature of the second signal based on the control signal.

8. The control device of claim 1 , wherein the delay module is disposed between the input signal processing module and the adjustment module.

9. The control device of claim 1 , wherein the delay module is configured to adjust a time difference between a moment that the second signal reaches the adjustment module and a moment that the control signal reaches the adjustment module by adjusting a delay of the transmission of the second signal.

10. The control device of claim 9 , wherein the delay of the transmission of the second signal to the adjustable module is longer than 0.2 microseconds.

11. The control device of claim 9 , wherein the time difference between the moment that the second signal reaches the adjustment module and the moment that the control signal reaches the adjustment module is less than 0.05 microseconds.

12. The control device of claim 1 , wherein the delay module includes at least one of an LC filter, a surface acoustic wave filter, or a delay line.

13. The control device of claim 1 , wherein the signal processing and control module is configured to cooperate with the delay module to ensure that the control signal and the second signal simultaneously reach the adjustment module.

14. The control device of claim 1 , wherein a total transmission time from a moment that the first signal is transmitted to the signal processing and control module to a moment that the control signal is transmitted to the adjustment module is composed of a first transmission time, a second transmission time, a third transmission time, and a fourth transmission time, wherein:
the first transmission time is a time that the signal processing and control module detects the first signal;
the second transmission time is a time that the signal processing and control module processes the first signal and generates the control signal;
the third transmission time is a time of transmitting the control signal to the adjustment module; and
the fourth transmission time is the adjustable delay imposed on the control signal.

15. The control device of claim 14 , wherein the adjustable delay is used to change a time difference between the total transmission time and a delay of the second signal such that the second signal and the control signal roughly simultaneously reach the adjustment module.

16. The control device of claim 1 , wherein the adjustment module includes at least one of a controllable attenuator or a phase shifter.

17. The control device of claim 1 , wherein
the radio frequency power amplification module is configured to receive and amplify the adjusted second signal to generate an output signal, and
the control device includes an output signal processing module configured to obtain, based on the output signal, a first output signal for signal detection and a second output signal for a load.

18. The control device of claim 17 , wherein the signal processing and control module is configured to
detect at least one feature of the first output signal; and
generate the control signal based on the first signal and the at least one feature of the first output signal.

19. A method for controlling a radio frequency power amplifier, implemented on a computing device including at least one processor, at least one storage device, and a communication platform connected to a network, comprising:
obtaining, by an input signal processing module, a first signal for signal detection, and a second signal for signal amplification based on an input signal;
generating, by a signal processing and control module, a control signal based on the first signal;
transmitting, by a delay module, the second signal to an adjustment module according to a delay;
adjusting, by the adjustment module, the second signal based on the control signal, wherein
an adjustable delay is imposed, by the signal processing and control module, on the control signal to adjust a moment that the control signal reaches the adjustment module.

Assignees

• Shanghai United Imaging Healthcare Co Ltd

Inventors

• Cao Bin
• Chu Xu
• Chen Jifeng
• Zhang Peng
• Wang Yinqi

Classifications

• H03F2201/3212

  Using a control circuit to adjust amplitude and phase of a signal in a signal path · CPC title

• H03F2200/451

  the amplifier being a radio frequency amplifier · CPC title

• H03F2200/393

  A measuring circuit being coupled to the output of an amplifier · CPC title

• H03F2200/228

  A measuring circuit being coupled to the input of an amplifier · CPC title

• H03F2200/105

  A non-specified detector of the power of a signal being used in an amplifying circuit · CPC title