# US 2013/0157717 A1 · Wireless communications circuitry with a triplexer for separating radio-frequency signals in adjacent frequency bands > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157717 A1 - Document ID: US20130157717A1 - Status: Published application - Kind: A1 - Application number: 13/631,332 - Filed: 2012-09-28 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Apple Inc. - Inventors: Qishan Yu; James T. Yang - Web page: https://patentgrep.com/patent/US20130157717A1 ## CPC - H04B 1/44: Transmit/receive switching - H04B 1/0057: {using diplexing or multiplexing filters for selecting the desired band} - H04B: TRANSMISSION ## Abstract A wireless electronic device may be used to communicate using multiple wireless standards in adjacent frequency bands. The wireless standards may include Wi-Fi® and cellular standards such as Long Term Evolution (LTE). The wireless electronic device may be provided with wireless communications circuitry that handles Wi-Fi® and cellular signals in adjacent frequency bands such as the Wi-Fi® 2.4 GHz frequency band and LTE bands 38 and 40. The wireless communications circuitry may include a triplexer interposed between transceiver circuitry and an antenna. The triplexer may be used to handle radio-frequency signals in adjacent frequency bands by separating the radio-frequency signals into signals associated with each frequency band. The triplexer may include filters that each pass signals in a respective one of the frequency bands between the transceiver circuitry and the antenna. ## Claims ### Claim 1 A wireless electronic device, comprising: an antenna; a first transceiver circuit; a second transceiver circuit; and a triplexer coupled to the antenna, wherein the triplexer comprises: a first filter configured to pass radio-frequency signals in a first frequency band between the antenna and the first transceiver circuit; a second filter configured to pass radio-frequency signals in a second frequency band between the antenna and the first transceiver circuit; and a third filter configured to pass radio-frequency signals in a third frequency band between the antenna and the second transceiver circuit. ### Claim 2 (depends on 1) The wireless electronic device defined in claim 1 wherein the first transceiver circuit comprises a cellular transceiver circuit. ### Claim 3 (depends on 2) The wireless electronic device defined in claim 2 wherein the third frequency band is adjacent to the first and second frequency bands, wherein the cellular transceiver circuit comprises a Long-Term Evolution transceiver circuit, and wherein the first filter is configured to pass radio-frequency signals in Long-Term Evolution Band 40. ### Claim 4 (depends on 3) The wireless electronic device defined in claim 3 wherein the second filter is configured to pass radio-frequency signals in Long-Term Evolution Band 38. ### Claim 5 (depends on 4) The wireless electronic device defined in claim 4 wherein the third filter is configured to pass Wi-Fi signals in a 2.4 GHz frequency band. ### Claim 6 (depends on 2) The wireless electronic device defined in claim 2 wherein the second transceiver circuit comprises a Wi-Fi transceiver circuit. ### Claim 7 (depends on 6) The wireless electronic device defined in claim 6 further comprising: a diplexer coupled between the triplexer and the antenna, wherein the diplexer is configured to pass radio-frequency signals in at least the first, second, and third frequency bands between the antenna and the triplexer and wherein the diplexer is configured to pass radio-frequency signals in a fourth frequency band between the antenna and the Wi-Fi transceiver. ### Claim 8 (depends on 7) The wireless electronic device defined in claim 7 wherein the diplexer comprises: a low pass filter configured to pass the radio-frequency signals in at least the first, second, and third frequency bands between the antenna and the triplexer; and a high pass filter configured to pass the radio-frequency signals in the fourth frequency band between the antenna and the Wi-Fi transceiver. ### Claim 9 (depends on 8) The wireless electronic device defined in claim 8 wherein the third frequency band comprises a 2.4 GHz Wi-Fi band, wherein the fourth frequency band comprises a 5 GHz Wi-Fi band, wherein the Wi-Fi transceiver is configured to wirelessly communicate in the 2.4 GHz frequency band using the third filter of the triplexer, and wherein the Wi-Fi transceiver is configured to wirelessly communicate in the 5 GHz frequency band using the high pass filter of the diplexer. ### Claim 10 (depends on 1) The wireless electronic device defined in claim 1 wherein the first filter comprises a high pass filter, wherein the second filter comprises a low pass filter, and wherein the third filter comprises a band pass filter. ### Claim 11 A method of operating a wireless electronic device having an antenna, the method comprising: with a triplexer, passing radio-frequency signals received by the antenna in a first frequency band to a first transceiver circuit; with the triplexer, passing radio-frequency signals received by the antenna in a second frequency band to the first transceiver circuit; and with the triplexer, passing radio-frequency signals received by the antenna in a third frequency band to a second transceiver circuit. ### Claim 12 (depends on 11) The method defined in claim 11 wherein the first transceiver circuit comprises a cellular transceiver circuit, the method further comprising: with the cellular transceiver circuit, receiving the radio-frequency signals in the first frequency band; and with the cellular transceiver circuit, receiving the radio-frequency signals in the second frequency band. ### Claim 13 (depends on 12) The method defined in claim 12 wherein the second transceiver circuit comprises a Wi-Fi transceiver circuit, the method further comprising: with the Wi-Fi transceiver circuit, receiving the radio-frequency signals in the third frequency band. ### Claim 14 (depends on 13) The method defined in claim 13 further comprising: with a diplexer having first and second filters that are coupled between the antenna and the triplexer, passing radio-frequency signals between the antenna and the triplexer in at least the first, second, and third frequency bands using the first filter; and with the second filter, passing radio-frequency signals in a fourth frequency band between the triplexer and the Wi-Fi transceiver. ### Claim 15 (depends on 11) The method defined in claim 11 wherein the triplexer comprises a low pass filter, a band pass filter, and a high pass filter, wherein passing the radio-frequency signals in the first frequency band comprises passing the radio-frequency signals in the first frequency band with the low pass filter, wherein passing the radio-frequency signals in the second frequency band comprises passing the radio-frequency signals in the second frequency band with the high pass filter, and wherein passing the radio-frequency signals in the third frequency band comprises passing the radio-frequency signals in the third frequency band with the band pass filter. ### Claim 16 Wireless communications circuitry, comprising: an antenna; and a triplexer, comprising: a first filter configured to pass cellular radio-frequency signals in a first frequency band from an antenna to a first triplexer port; a second filter configured to pass cellular radio-frequency signals in a second frequency band from the antenna to a second triplexer port; and a third filter configured to pass Wi-Fi radio-frequency signals in a third frequency band from the antenna to a third triplexer port. ### Claim 17 (depends on 16) The wireless communications circuitry defined in claim 16 further comprising: cellular transceiver circuitry coupled to the first and second triplexer ports; and Wi-Fi transceiver circuitry coupled to the third triplexer port. ### Claim 18 (depends on 17) The wireless communications circuitry defined in claim 17 further comprising: an additional antenna; and switching circuitry coupled to the antenna via the first and second triplexer ports, the additional antenna, and the cellular transceiver circuitry, wherein the switching circuitry is operable in a first configuration in which the cellular transceiver circuitry is coupled to the antenna and in a second configuration in which the cellular transceiver circuitry is coupled to the additional antenna. ### Claim 19 (depends on 18) The wireless communications circuitry defined in claim 18 further comprising: a diplexer coupled between the triplexer and the antenna, wherein the diplexer is configured to pass radio-frequency signals in at least the first, second and third frequency bands from the antenna to the triplexer and wherein the diplexer is further configured to pass radio-frequency signals in a fourth frequency band from the antenna to the Wi-Fi transceiver circuitry. ### Claim 20 (depends on 16) The wireless communications circuitry defined in claim 16 wherein the first frequency band comprises a first cellular frequency band, wherein the second frequency band comprises a second cellular frequency band, wherein third frequency band comprises a Wi-Fi frequency band, and wherein the Wi-Fi frequency band is adjacent to the first and second cellular frequency bands.