Remote compensators for mobile devices

Patent metadata

Field	Value
Publication number	US-11515608-B2
Application number	US-202016802323-A
Country	US
Kind code	B2
Filing date	Feb 26, 2020
Priority date	Feb 27, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

Remote compensators for mobile devices are provided. In certain embodiments, a mobile device includes a cable-side circulator, an antenna, receive amplifier circuitry that amplifies a receive signal from the antenna and provides an amplified receive signal to the cable-side circulator, transmit amplifier circuitry that amplifies a transmit signal from the cable-side circulator, and a first antenna-side circulator and a second antenna-side circulator each coupled between the transmit amplifier circuitry and the antenna. The first antenna-side circulator and the second antenna-side circulator operate to compensate the receive signal for transmit leakage arising from the transmit amplifier circuitry.

First claim

What is claimed is:

1. A mobile device comprising:
a cable-side circulator including an output configured to provide a transmit signal and an input configured to receive an amplified receive signal;
an antenna;
receive amplifier circuitry configured to amplify a receive signal from the antenna and to provide the amplified receive signal to the cable-side circulator;
transmit amplifier circuitry including a power amplifier configured to amplify the transmit signal from the cable-side circulator; and
a first antenna-side circulator and a second antenna-side circulator connected in series with the power amplifier between the output of the cable-side circulator and the antenna, the first antenna-side circulator and the second antenna-side circulator configured to control the input of the cable-side circulator to compensate the amplified receive signal for transmit leakage arising from the transmit amplifier circuitry.

2. The mobile device of claim 1 wherein the transmit amplifier circuitry includes an input connected to the cable-side circulator and an output connected to the second antenna-side circulator, the first antenna-side circulator connected between the second antenna-side circulator and the antenna.

3. The mobile device of claim 2 further comprising a combiner configured to generate the receive signal at an output and coupled to the first antenna-side circulator at a first input, and a phase shifter coupled between the second antenna-side circulator and a second input of the combiner.

4. The mobile device of claim 1 further comprising a front-end system and a cable connecting the front-end system to the cable-side circulator, the cable configured to carry the transmit signal and the amplified receive signal.

5. A remote compensator for a mobile device, the remote compensator comprising:
a cable-side circulator coupled to a cable port, the cable-side circulator including an output configured to provide a transmit signal and an input configured to receive an amplified receive signal;
receive amplifier circuitry configured to amplify a receive signal from an antenna port to provide the amplified receive signal to the cable-side circulator;
transmit amplifier circuitry including a power amplifier configured to amplify the transmit signal from the cable-side circulator; and
a first antenna-side circulator and a second antenna-side circulator connected in series with the power amplifier between the output of the cable-side circulator and the antenna port, the first antenna-side circulator and the second antenna-side circulator configured to control the input of the cable-side circulator to compensate the amplified receive signal for transmit leakage arising from the transmit amplifier circuitry.

6. The remote compensator of claim 5 wherein the transmit amplifier circuitry includes an input connected to the cable-side circulator and an output connected to the second antenna-side circulator, the first antenna-side circulator connected between the second antenna-side circulator and the antenna port.

7. A method of remote compensation in a mobile device, the method comprising:
amplifying a receive signal from an antenna to generate an amplified receive signal using receive amplifier circuitry;
providing the amplified received signal from the receive amplifier circuitry to a cable by way of an input of a cable-side circulator;
amplifying a transmit signal from an output of the cable-side circulator using transmit amplifier circuitry including a power amplifier; and
compensating the receive signal for transmit leakage arising from the transmit amplifier circuitry using a first antenna-side circulator and a second antenna-side circulator connected in series with the power amplifier between the output of the cable-side circulator and the antenna, including controlling the input of the cable-side circulator using the first antenna-side circulator and the second antenna-side circulator.

8. The method of claim 7 wherein the second antenna-side circulator includes an input connected to an output of the power amplifier, a first output connected to an input of the first antenna-side circulator, and a second output connected to an input of a phase shifter, the method further comprising generating a phase-shifted radio frequency signal by phase shifting a first radio frequency signal from the second output of the second antenna-side circulator.

9. The method of claim 8 further comprising combining the phase-shifted radio frequency signal and a second radio frequency signal from an output of the first antenna-side circulator using a combiner.

10. The method of claim 9 further comprising providing a 180 degree phase shift using the phase shifter.

11. The mobile device of claim 1 further comprising an antennas-side multiplexer connected between the antenna and the first antenna-side circulator.

12. The mobile device of claim 1 wherein the second antenna-side circulator is directly connected between the first antenna-side circulator and an output of the power amplifier.

13. The mobile device of claim 1 further comprising a phase shifter, the second antenna-side circulator including an input connected to an output of the power amplifier, a first output connected to an input of the first antenna-side circulator, and a second output connected to an input of the phase shifter.

14. The mobile device of claim 13 wherein the first antenna-side circulator further includes a first output connected to the antenna.

15. The mobile device of claim 14 further comprising a combiner including a first input connected to an output of the phase shifter, a second input connected to a second output of the first antenna-side circulator, and an output connected to an input of the receive amplifier circuitry.

16. The mobile device of claim 15 wherein the phase shifter provides a 180 degree phase shift.

17. The remote compensator of claim 5 wherein the second antenna-side circulator is directly connected between the first antenna-side circulator and an output of the power amplifier.

18. The remote compensator of claim 5 further comprising a phase shifter, the second antenna-side circulator including an input connected to an output of the power amplifier, a first output connected to an input of the first antenna-side circulator, and a second output connected to an input of the phase shifter.

19. The remote compensator of claim 18 wherein the first antenna-side circulator further includes a first output connected to the antenna port.

20. The remote compensator of claim 5 further comprising a combiner including a first input connected to an output of the phase shifter, a second input connected to a second output of the first antenna-side circulator, and an output connected to an input of the receive amplifier circuitry.

Assignees

• Skyworks Solutions Inc

Inventors

• Pehlke David Richard

Classifications

• H01Q21/30

  Combinations of separate antenna units operating in different wavebands and connected to a common feeder system · CPC title

• H03F2200/451

  the amplifier being a radio frequency amplifier · CPC title

• H03F3/195 Primary

  in integrated circuits · CPC title

• H03F3/245

  with semiconductor devices only · CPC title

• H04B7/0426

  Power distribution · CPC title