Electronic device including duplexer including filter having characteristic that is adaptively changed according to state

Patent metadata

Field	Value
Publication number	US-12519493-B2
Application number	US-202217969527-A
Country	US
Kind code	B2
Filing date	Oct 19, 2022
Priority date	Oct 29, 2021
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

An electronic device may include an antenna, a radio frequency front end (RFFE) including a first duplexer including a first filter and a second filter and a second duplexer including a first filter and a second filter and at least one processor, operatively coupled with the RFFE, configured to change a cut-off frequency of the second filter in the first duplexer to a first frequency cutting off the sixth signal in portion of the downlink frequency range of the third frequency band partially overlapping the downlink frequency range of the second frequency band or change a cut-off frequency of the second filter in the second duplexer to a second frequency cutting off the fourth signal in portion of the downlink frequency range of the second frequency band partially overlapping the downlink frequency range of the third frequency band. In addition, various embodiments be possible.

First claim

What is claimed is:

1 . An electronic device comprising:
an antenna; a radio frequency front end (RFFE) comprising:
a first duplexer comprising:
a first filter configured to pass a first signal in uplink frequency range of a first frequency band, and
a second filter configured to pass:
a second signal in downlink frequency range of the first frequency band, and
a fourth signal in downlink frequency range of a second frequency band partially overlapping the downlink frequency range of the first frequency band; and

a second duplexer comprising:
a first filter configured to pass;
a third signal in uplink frequency range of the second frequency band, and
a fifth signal in uplink frequency range of a third frequency band, and

a second filter configured to pass a sixth signal in downlink frequency range of the third frequency band that is separate from the downlink frequency range of the first frequency band and partially overlaps the downlink frequency range of the second frequency band;

at least one processor, comprising processing circuitry; and memory comprising one or more storage media storing instructions to, when executed by the at least one processor individually and/or collectively, cause the electronic device to: while both the first duplexer and the second duplexer are electrically connected with the antenna:
based on controlling the first duplexer from among the first and second duplexers, adjust a cut-off frequency of the second filter in the first duplexer to a first frequency cutting off the sixth signal in a portion of the downlink frequency range of the third frequency band partially overlapping the downlink frequency range of the second frequency band, and/or
based on controlling the second duplexer from among the first and second duplexers, adjust a cut-off frequency of the second filter in the second duplexer to a second frequency cutting off the fourth signal in a portion of the downlink frequency range of the second frequency band partially overlapping the downlink frequency range of the third frequency band.

2 . The electronic device of claim 1 , wherein the instructions, when executed individually and/or collectively by the at least one processor, cause the electronic device to:
while transmitting the third signal and receiving the fourth signal via the antenna, which is electrically connected with both the first duplexer and the second duplexer, adjust the cut-off frequency of the second filter in the second duplexer to the second frequency; and while transmitting the first signal and receiving the second signal and the sixth signal via the antenna, which is electrically connected with both the first duplexer and the second duplexer, adjust the cut-off frequency of the second filter in the first duplexer to the first frequency.

3 . The electronic device of claim 1 , wherein the instructions, when executed individually and/or collectively by the at least one processor, cause the electronic device to:
while the first duplexer, from among the first duplexer and the second duplexer, is electrically connected with the antenna, maintain the cut-off frequency of the second filter in the first duplexer as a third frequency passing both the second signal in the downlink frequency range of the first frequency band and the fourth signal in the downlink frequency range of the second frequency band; and while the second duplexer, from among the first duplexer and the second duplexer, is electrically connected with the antenna, maintain the cut-off frequency of the second filter in the second duplexer as a fourth frequency passing the sixth signal in the downlink frequency range of the third frequency band.

4 . The electronic device of claim 3 , wherein the instructions, when executed individually and/or collectively by the at least one processor, cause the electronic device to:
while transmitting the first signal and receiving the second signal via the antenna, which is electrically connected with the first duplexer from among the first duplexer and the second duplexer, maintain the cut-off frequency of the second filter in the first duplexer as the third frequency; and while transmitting the fifth signal and receiving the sixth signal via the antenna, which is electrically connected with the second duplexer from among the first duplexer and the second duplexer, maintain the cut-off frequency of the second filter in the second duplexer as the fourth frequency.

5 . The electronic device of claim 1 , wherein the RFFE further comprises a switch,
wherein the first duplexer is connectable with the antenna via the switch, wherein the second duplexer is connectable with the antenna via the switch, and wherein the instructions, when executed individually and/or collectively by the at least one processor, cause the electronic device to, while controlling the switch to electrically connect both the first duplexer and the second duplexer with the antenna, adjust the cut-off frequency of the second filter in the first duplexer to the first frequency, and/or the cut-off frequency of the second filter in the second duplexer to the second frequency.

6 . The electronic device of claim 5 , wherein the instructions, when executed individually and/or collectively by the at least one processor, cause the electronic device to:
while controlling the switch to electrically connect the first duplexer from among the first duplexer and the second duplexer with the antenna, maintain the cut-off frequency of the second filter in the first duplexer as a third frequency passing both the second signal in the downlink frequency range of the first frequency band and the fourth signal in the downlink frequency range of the second frequency band; and while controlling the switch to electrically connect the second duplexer from among the first duplexer and the second duplexer with the antenna, maintain the cut-off frequency of the second filter in the second duplexer as a fourth frequency passing the sixth signal in the downlink frequency range of the third frequency band.

7 . The electronic device of claim 5 , wherein the RFFE further comprises:
first impedance matching circuitry, electrically connected with the first duplexer, and electrically connected with the switch; and second impedance matching circuitry, electrically connected with the second duplexer, and electrically connected with the switch, and wherein the instructions, when executed by the at least one processor, cause the electronic device to: while controlling the switch to electrically connect both the first duplexer and the second duplexer with the antenna:
based on controlling the first impedance matching circuitry from among the first impedance matching circuitry and the second impedance matching circuitry, and adjust the cut-off frequency of the second filter in the first duplexer to the first frequency using at least the first impedance matching circuitry, and/or
based on controlling the second impedance matching circuitry from among the first impedance matching circuitry and the second impedance matching circuitry, adjust the cut-off frequency of the second filter in the second duplexer to the second frequency using at least the second impedance matching circuitry.

8 . The electronic device of claim 5 , wherein the RFFE further comprises:
first impedance matching circuitry electrically connected with the second filter in the first duplexer; and second impedance matching circuitry electrically connected with the second filter in the second duplexer, and wherein the instructions, when executed individually and/or collectively by the at least one processor, cause the electronic device to: while controlling the switch to electrically connect both

Assignees

• Samsung Electronics Co Ltd

Inventors

• Moon John
• Kim Taeyoung
• Na Hyoseok
• Yang Dongil

Classifications

• H04B1/0057

  using diplexing or multiplexing filters for selecting the desired band · CPC title

• H04B1/48

  in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter {(H04B1/46 takes precedence)} · CPC title

• H04B1/00

  Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission · CPC title

• H03H7/46

  Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source · CPC title

• H03H7/38

  Impedance-matching networks · CPC title