# US 2022/0045653 A1 · Multi-frequency band communication based on filter sharing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0045653 A1 - Document ID: US20220045653A1 - Status: Published application - Kind: A1 - Application number: 17/481,092 - Filed: 2021-09-21 - Published: 2022-02-10 - Earliest claimed: 2020-06-30 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Saihua Lin; Hongrui Wang; Sohrab Emami-Neyestanak - Web page: https://patentgrep.com/patent/US20220045653A1 ## CPC - H03F 1/223: {with MOSFET's} - H03F 3/195: in integrated circuits - H03F 3/213: in integrated circuits - H03F 3/72: Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal - H04B 1/0053: {with common antenna for more than one band} - H03F 2200/294: the amplifier being a low noise amplifier [LNA] - H03F 2200/451: the amplifier being a radio frequency amplifier - H03F 2203/7209: the gated amplifier being switched from a first band to a second band - H04B 1/48: in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter {(H04B1/46 takes precedence)} - H04B 1/525: with means for reducing leakage of transmitter signal into the receiver - H03F: AMPLIFIERS - H04B: TRANSMISSION ## Abstract The present disclosure relates to systems and methods for operating transceiver circuitry to transmit or receive signals on various frequency ranges. To do so, a transmitter or a receiver of the transceiver circuitry is selectively coupled to or uncoupled from an antenna of the transceiver circuitry. Additionally, radio frequency filters may be individually or collectively coupled to and/or uncoupled from the antenna to filter different frequencies in the transmitting or receiving signals. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A device, comprising: one or more antennas; transmission circuitry; receiver circuitry; a first filter communicatively coupled to the one or more antennas; a second filter communicatively coupled to the receiver circuitry; a first switch configured to couple the transmission circuitry to the first filter and the one or more antennas; and a second switch configured to couple the first filter and the one or more antennas to the second filter and the receiver circuitry. ### Claim 22 (depends on 21) The device of claim 21, comprising a controller configured to transmit a transmit signal on a first frequency band by closing the first switch to couple the transmission circuitry to the first filter and the one or more antennas, and opening the second switch to uncouple the first filter and the one or more antennas from the second filter and the receiver circuitry. ### Claim 23 (depends on 22) The device of claim 22, wherein the controller is configured to transmit the transmit signal on a second frequency band non-overlapping with the first frequency band by closing the first switch to couple the transmission circuitry to the first filter and the one or more antennas, and closing the second switch to couple the first filter and the one or more antennas to the second filter and the receiver circuitry. ### Claim 24 (depends on 23) The device of claim 23, wherein the controller is configured to select between the first frequency band and the second frequency band based on an indication of a communication mode. ### Claim 25 (depends on 23) The device of claim 23, comprising a third switch configured to couple the second filter to a ground terminal, the controller configured to transmit the transmit signal on the second frequency band by closing the third switch to couple the second filter to the ground terminal. ### Claim 26 (depends on 3) The device of claim 3, comprising additional receiver circuitry, a third filter communicatively coupled to the additional receiver circuitry, and a third switch configured to couple the one or more antennas and the first filter to the third filter and the additional receiver circuitry, the controller configured to receive a receive signal on a third frequency band non-overlapping with the first frequency band and the second frequency band. ### Claim 27 (depends on 26) The device of claim 26, wherein the first frequency band comprises frequencies between 24 Gigahertz (GHz) and 33 GHz, the second frequency band comprises frequencies between 37 GHz and 43 GHz, and the third frequency band comprises frequencies between 43 GHz and 48 GHz. ### Claim 28 (depends on 21) The device of claim 21, wherein the first filter comprises an inductor coupled in parallel with a capacitor. ### Claim 29 An electronic device, comprising: a first switch configured to couple one or more antennas and a first filter to a first low noise amplifier via a second filter; a second switch configured to couple the one or more antennas and the first filter to a power amplifier; and a controller configured to cause the first switch to close to transmit, via the one or more antennas, one or more transmit signals corresponding to a first frequency range; cause the second switch to close to receive, via the one or more antennas, one or more receive signals corresponding to the first frequency range; and cause the first switch and the second switch to open to receive, via the one or more antennas, one or more receive signals corresponding to a second frequency range. ### Claim 30 (depends on 29) The electronic device of claim 29, wherein the controller is configured to cause the first switch and the second switch to close to transmit, via the one or more antennas, one or more transmit signals corresponding to the second frequency range. ### Claim 31 (depends on 29) The electronic device of claim 29, comprising a third switch configured to couple the one or more antennas and the first filter to a second low noise amplifier via a third filter. ### Claim 32 (depends on 29) The electronic device of claim 29, wherein the controller is configured to receive a status indicating which of the first frequency range or the second frequency range to use. ### Claim 33 (depends on 31) The electronic device of claim 31, wherein the first frequency range comprises frequencies between 24 Gigahertz (GHz) and 33 GHz and the second frequency range comprises frequencies between 37 GHz and 43 GHz. ### Claim 34 (depends on 29) The electronic device of claim 29, wherein the controller is configured to couple the second filter to the one or more antennas and the first filter at least in part by coupling the second filter to a reference voltage terminal. ### Claim 35 (depends on 29) The electronic device of claim 29, wherein the second filter is configured to attenuate a range of frequencies based at least in part on an impedance characterizing circuitry of the second filter. ### Claim 36 A method, comprising: receiving, via processing circuitry, an indication of an operational state of one or more antennas, the one or more antennas coupled to a first filter and configured to couple to a second filter; and causing, via the processing circuitry, the one or more antennas to transmit signals of a first frequency band or of a second frequency band based on selective coupling of the one or more antennas to the second filter, of the first filter to a transmitter, or a combination thereof, the selective coupling being based on the operational state of the one or more antennas. ### Claim 37 (depends on 36) The method of claim 36, wherein causing, via the processing circuitry, the one or more antennas to transmit signals of the first frequency band or of the second frequency band comprises causing, via the processing circuitry, the first filter to be communicatively coupled to the transmitter and the second filter to be communicatively coupled to the one or more antennas to transmit signals using the second frequency band. ### Claim 38 (depends on 36) The method of claim 36, wherein causing, via the processing circuitry, the one or more antennas to transmit signals of the first frequency band or of the second frequency band comprises causing, via the processing circuitry, the first filter to be communicatively coupled to the transmitter and the second filter to be communicatively decoupled from the one or more antennas to transmit signals of the first frequency band. ### Claim 39 (depends on 36) The method of claim 36, wherein the indication of the operational state comprises an indication of a frequency band and an indication of a transmission or reception operation. ### Claim 40 (depends on 36) The method of claim 36, comprising receiving, via the processing circuitry, an indication that there is no subsequent transmission or reception operation, and decreasing, via the processing circuitry, an amount of power supplied to a power amplifier coupled to the transmitter based on the indication.