Configurable radio frequency filter

Patent metadata

Field	Value
Publication number	US-12004134-B2
Application number	US-202016930966-A
Country	US
Kind code	B2
Filing date	Jul 16, 2020
Priority date	Sep 10, 2019
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A configurable radio frequency filter is discussed herein. A device can include a filter component that includes multiple filters coupled between a radio frequency integrated circuit (RFIC) and one or more antennas via individual switches. A filter of the filter component may comprise a bandpass filter configured to pass specific frequencies. Filters of the filter component can comprise pass bands that are mutually exclusive or at least partially overlapping. A device can receive a channel allocation in a Citizens Broadband Radio Service (CBRS) band from a Spectrum Access System when initiating a carrier aggregated communication. In response to receiving the channel allocation, the device can select one or more filters of the filter component for filtering signals to and from an antenna component.

First claim

What is claimed is:

1. A system comprising:
a first antenna configured for low-band communication operating in 600 MHz frequencies;
a second antenna configured for mid-band communication operating in 2500 MHz frequencies;
a third antenna configured for high-band communication operating in 26 GHz and 28 GHz frequencies;
a radio frequency integrated circuit (RFIC);
a first bandpass filter selectively coupled between at least one of the first antenna, the second antenna, or the third antenna and the RFIC via a first switch, wherein the first bandpass filter is associated with a first frequency range and comprises at least one of a configurable filter or a fixed filter;
a second bandpass filter selectively coupled between at least one of the first antenna, the second antenna, or the third antenna and the RFIC via a second switch, wherein the second bandpass filter is associated with a second frequency range that is adjacent to the first frequency range or at least partially overlaps the first frequency range;
one or more processors; and
one or more non-transitory computer-readable media storing computer-executable instructions that, when executed, cause the one or more processors to perform operations comprising:
receiving data indicative of a channel allocation; and
sending, based at least in part on the data, a signal to one of the first switch or the second switch to selectively couple either the first bandpass filter or the second bandpass filter between at least one of the first antenna, the second antenna, or the third antenna and the RFIC for a communication between the system and a base station, wherein the communication is a time-division duplexing (TDD) communication.

2. The system of claim 1 , the operations further comprising:
receiving the data from a Spectrum Access System (SAS).

3. The system of claim 1 , wherein the first bandpass filter and the second bandpass filter are associated with a first wireless resource, the operations further comprising:
sending, via a second wireless resource that is different from the first wireless resource, a request for the channel allocation;
receiving the data in response to the request; and
establishing the communication as a carrier aggregated communication using the first wireless resource and the second wireless resource.

4. The system of claim 3 , wherein the first wireless resource is associated with a Citizens Broadband Radio Service (CBRS).

5. The system of claim 1 , wherein the low-band is associated with band 71, the mid-band is associated with band 41, and the high-band is associated with band 258 and band 257.

6. The system of claim 1 , wherein the mid-band is associated with a Citizens Broadband Radio Service (CBRS).

7. The system of claim 1 , wherein the first antenna is associated with transmitting operations and at least one of the second antenna or the third antenna is associated with receiving operations.

8. The system of claim 1 wherein the first antenna is associated with 4G communications and at least one of the second antenna or the third antenna is associated with 5G communications.

9. The system of claim 1 , further comprising a third bandpass filter coupled between at least one of the first antenna, the second antenna, or the third antenna and the RFIC via a third switch.

10. The system of claim 1 , wherein the first bandpass filter comprises a configurable filter.

11. The system of claim 1 , wherein the first bandpass filter comprises a fixed filter and the second bandpass filter comprises a configurable filter.

12. A method comprising:
receiving data indicative of a channel allocation; and
sending, based at least in part on the data, a signal to one of a first switch or a second switch to selectively couple either a first bandpass filter or a second bandpass filter between at least one of a first antenna configured for low-band communication, a second antenna configured for mid-band communication, or a third antenna configured for high-band communication and a radio frequency integrated circuit (RFIC) for a communication between a user equipment and a base station, the communication being a time-division duplexing (TDD) communication and the user equipment including the first antenna, the second antenna, and the third antenna,
wherein the low-band communication is associated with band 71, the mid-band communication is associated with band 41, and the high-band communication is associated with band 258 and band 257,
wherein the first bandpass filter comprises a configurable filter that is associated with a first frequency range and the second bandpass filter is associated with a second frequency range that is adjacent to the first frequency range or at least partially overlaps the first frequency range.

13. The method of claim 12 , further comprising:
receiving the data from a Spectrum Access System (SAS).

14. The method of claim 12 , wherein:
the data is first data,
the channel allocation is a first channel allocation,
the signal is a first signal, and
the communication is a first communication,
the method further comprising:
receiving second data indicative of a second channel allocation; and
sending, based at least in part on the second data, a second signal to a third switch to selectively couple a third bandpass filter between at least one of the first antenna, the second antenna, or the third antenna and the RF IC for a second communication between the user equipment and the base station,
wherein a third frequency range associated with the third bandpass filter at least partially overlaps at least a portion of the first frequency range and the second frequency range.

15. The method of claim 12 , wherein the first bandpass filter and the second bandpass filter are associated with a first wireless resource, the method further comprising:
sending, via a second wireless resource that is different from the first wireless resource, a request for the channel allocation;
receiving the data in response to the request; and
establishing the communication as a carrier aggregated communication using the first wireless resource and the second wireless resource.

16. The method of claim 12 , further comprising:
determining that a data request is above a data threshold;
determining that a Citizens Broadband Radio Service (CBRS) resource is available for the communication; and
establishing the communication as a carrier aggregated communication.

17. A system comprising:
a first antenna configured for low-band communication;
a second antenna configured for mid-band communication that is associated with a Citizens Broadband Radio Service (CBRS);
a third antenna configured for high-band communication;
a radio frequency integrated circuit (RFIC);
a first bandpass filter selectively coupled between at least one of the first antenna, the second antenna, or the third antenna and the RFIC via a first switch, wherein the first bandpass filter is associated with a first frequency range and comprises a fixed filter;
a second bandpass filter selectively coupled between at least one of the first antenna, the second antenna, or the third antenna and the RFIC via a second switch, wherein the second bandpass filter is associated with a second frequency range that is adjacent to the first frequency range or at least partially overlaps the first frequency range and comprises a configurable filter;
one or more processors; and
one or more non-transitory computer-readable media storing computer-executable instructions that, when executed, cause the one or more processors to perf

Assignees

• T Mobile Usa Inc

Inventors

• Lan Wei-Ming

Classifications

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04B1/006 Primary

  using switches for selecting the desired band (H04B1/0057 takes precedence) · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title