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公开(公告)号：US12143145B2
公开(公告)日：2024-11-12
申请号：US17939657
申请日：2022-09-07
Applicant: Apple Inc.
Inventor： Christof Pfannenmüller , Dominic Koehler , Julian W Zuber , Oliver Georg Dorn , Bjoern Lenhart , Harald Pretl , Rastislav Vazny , Christian F Tanzer
Abstract: Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test signal at an output of the duplexer. The test signal may include a radio frequency signal having less power than the wanted signal to avoid interference, or a digital signal that is added to or extracted from the wanted signal when the wanted signal does not have a radio frequency. A processor of the communication device causes the duplexer to operate in a tuning state (e.g., to transmit signals having a transmission frequency and receive signals having a receive frequency). The measurement system determines a difference or ratio in power between the test signal at the duplexer output and the duplexer input, and adjusts the tuning state based on the difference or ratio (e.g., to decrease or minimize the difference or ratio).
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Patent Agency Ranking
公开(公告)号：US20240080008A1
公开(公告)日：2024-03-07
申请号：US17939616
申请日：2022-09-07
Applicant: Apple Inc.
Inventor： Christof Pfannenmüller , Dominic Koehler , Julian W Zuber , Oliver Georg Dorn , Bjoern Lenhart , Harald Pretl , Rastislav Vazny , Christian F Tanzer
CPC classification number: H03H7/487 , H04B1/1027 , H04B1/40
Abstract: Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test signal at an output of the duplexer. The test signal may include a radio frequency signal having less power than the wanted signal to avoid interference, or a digital signal that is added to or extracted from the wanted signal when the wanted signal does not have a radio frequency. A processor of the communication device causes the duplexer to operate in a tuning state (e.g., to transmit signals having a transmission frequency and receive signals having a receive frequency). The measurement system determines a difference or ratio in power between the test signal at the duplexer output and the duplexer input, and adjusts the tuning state based on the difference or ratio (e.g., to decrease or minimize the difference or ratio).
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公开(公告)号：US20240088921A1
公开(公告)日：2024-03-14
申请号：US17945023
申请日：2022-09-14
Applicant: Apple Inc.
Inventor： Bjoern Lenhart , Christof Pfannenmüller , Dominic Koehler , Harald Pretl , Rastislav Vazny
CPC classification number: H04B1/0057 , H04B1/04 , H04B1/10
Abstract: A communication device includes a duplexer differentially coupled to a receiver and a transmitter. The duplexer may include phase shifters on the differential lines to provide differential received signals to the receiver and receive differential transmission signals from the transmitter for transmission. For example, the phase shifter are positioned such that single-ended received signals may be converted to differential received signals and convert the differential transmission signals to single-ended transmission signals for transmission. Moreover, the phase shifters may provide the single-ended transmission signals to antennas for transmission and to the differential lines of the receiver for cancellation/isolation. Furthermore, the phase shifters may provide the differential received signals to the receiver for reception and provide the single-ended received signals to the differential lines of the transmitter for cancellation/isolation. Accordingly, the duplexer may convey communication signal while reducing signal interference by providing improved isolation.
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公开(公告)号：US20240088538A1
公开(公告)日：2024-03-14
申请号：US17932275
申请日：2022-09-14
Applicant: Apple Inc.
Inventor： Christof Pfannenmüller , Dominic Koehler , Harald Pretl , Rastislav Vazny
Abstract: An electronic device may include isolation circuitry coupled between a transmitter, a receiver, and one or more antennas. The isolation circuitry may include a 90 degree hybrid coupler configured receive a transmission (TX) signal from the transmitter, split the TX signal into a first portion and a second portion, and phase-shift a portion such that the portions are +90 degrees out-of-phase. The isolation circuitry may include phase shifters that phase-shift the portions such that the portions are in-phase prior to propagating to the antenna. The phase shifters may receive a first portion and a second portion of a receiver (RX) signal from splitter circuitry. The phase shifters may phase-shift the portions such that the portions are out-of-phase by −90 degrees. The 90 degree hybrid coupler may phase-shift the first portion and/or the second portion such that the portions are in-phase and constructively combine prior to propagating to the receiver.
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公开(公告)号：US20240097639A1
公开(公告)日：2024-03-21
申请号：US17945826
申请日：2022-09-15
Applicant: Apple Inc.
Inventor： Christof Pfannenmüller , Joonhoi Hur , Dominic Koehler , Harald Pretl , Rastislav Vazny
Abstract: A differential double balanced duplexer (dDBD) includes a transmitter and a first balun are coupled to a first impedance tuner that produces a first impedance that blocks received signals at a first frequency range from travelling across the first balun and into the transmitter, and a second impedance that passes transmitted signals at a second frequency range to travel across the first balun to the antenna. The dDBD also includes a receiver and a second balun coupled to a second impedance tuner that produces a first impedance that allows the received signals at the first frequency range to travel across the second balun and into the receiver, and a second impedance that blocks the transmitted signals at the second frequency range from travelling across the second balun and into the receiver. As such, the dDBD allows for increased isolation and decreased insertion loss.
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公开(公告)号：US20240080063A1
公开(公告)日：2024-03-07
申请号：US17939657
申请日：2022-09-07
Applicant: Apple Inc.
Inventor： Christof Pfannenmüller , Dominic Koehler , Julian W Zuber , Oliver Georg Dorn , Bjoern Lenhart , Harald Pretl , Rastislav Vazny , Christian F Tanzer
CPC classification number: H04B1/50 , H03H7/487 , H04B1/0475 , H04B1/1027
Abstract: Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test signal at an output of the duplexer. The test signal may include a radio frequency signal having less power than the wanted signal to avoid interference, or a digital signal that is added to or extracted from the wanted signal when the wanted signal does not have a radio frequency. A processor of the communication device causes the duplexer to operate in a tuning state (e.g., to transmit signals having a transmission frequency and receive signals having a receive frequency). The measurement system determines a difference or ratio in power between the test signal at the duplexer output and the duplexer input, and adjusts the tuning state based on the difference or ratio (e.g., to decrease or minimize the difference or ratio).
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