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公开(公告)号：US20220291338A1
公开(公告)日：2022-09-15
申请号：US17200311
申请日：2021-03-12
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Bernhard Sogl , Jochen Schrattenecker , Andreas Menkhoff , Bin Xiao , Lucas Calderin , Andre Hanke , Harald Pretl , Rastislav Vazny
Abstract: An electronic device may include a processor and wireless circuitry with transmit and receive antennas. Radar circuitry may use the transmit and receive antennas to perform spatial ranging on external objects farther than a threshold distance (e.g., 1-2 cm) from the transmit antenna. The wireless circuitry may include a voltage standing wave ration (VSWR) sensor coupled to the transmit antenna to detect the presence of objects within the threshold distance from the transmit antenna. This may serve to cover a blind spot for the radar circuitry near to the transmit antenna. The VSWR sensor may gather background VSWR measurements when other wireless performance metric data for the wireless circuitry is within a predetermined range of satisfactory values. The background VSWR measurements may be subtracted from real time VSWR measurements to perform accurate and robust ultra-short range object detection near to the transmit antenna.
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公开(公告)号：US20220078059A1
公开(公告)日：2022-03-10
申请号：US17015513
申请日：2020-09-09
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Björn Lenhart , Joonhoi Hur , Rastislav Vazny
IPC: H04L27/26
Abstract: Embodiments disclosed herein relate to reducing or substantially eliminating an insertion loss caused by isolating a transmit circuit from a receive circuit of an electronic device. To do so, an isolation circuit may be disposed between the transmit circuit and the receive circuit. The isolation circuit may have a first signal path and a second signal path. A first portion of the signal may propagate along the first signal path and a second portion of the signal may propagate along the second signal path. A phase shifter may be disposed on the first signal path to shift a phase of the first portion to match a phase of the second portion. The phase-shifted first portion may be combined with the second portion to reduce or substantially eliminate an insertion loss caused by the isolation circuit.
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公开(公告)号：US20210409063A1
公开(公告)日：2021-12-30
申请号：US16916914
申请日：2020-06-30
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Joonhoi Hur , Rastislav Vazny
Abstract: An electrical balance duplexer has multiple impedance gradients and multiple impedance tuners. The electrical balance duplexer transmits an outgoing signal from a transmitter during a transmission mode when a first set of impedance gradients of the multiple impedance gradients is operating in a first impedance state and a first set of impedance tuners of the multiple impedance tuners is operating in a second state. The electrical balance duplexer isolates the outgoing signal from a receiver during the transmission mode when a second set of impedance gradients of the multiple impedance gradients and a second set of impedance tuners of the multiple impedance tuners are operating in the second impedance state.
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公开(公告)号：US11177837B1
公开(公告)日：2021-11-16
申请号：US16899741
申请日：2020-06-12
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Rastislav Vazny
Abstract: A duplexer may be used to isolate a transmitter and a receiver that share a common antenna. By using impedance gradients to provide impedances that cause balance-unbalance transformers (balun) of the duplexer to cut-off access to the common antenna rather than duplicate the antenna impedance, the duplexer is balanced. Such cut-offs may have a lower insertion loss than a duplexer that merely duplicates the antenna impedance to separate the differential signals of the receiver and transmitter from the common mode signal.
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公开(公告)号：US20210184825A1
公开(公告)日：2021-06-17
申请号：US17188574
申请日：2021-03-01
Applicant: Apple Inc.
Inventor： Nedim Muharemovic , Joonhoi Hur , Rastislav Vazny
Abstract: An electrical balance duplexer (EBD) may be used to isolate a transmitter and receiver that share a common antenna. By using impedance gradients to provide impedances that cause balance-unbalance transformers (balun) of the EBD to cut-off access to the common antenna rather than duplicate the antenna impedance, the EBD is balanced. Such cut-offs may have a lower insertion loss than an EBD that merely duplicates the antenna impedance to separate the differential signals of the receiver/transmitter from the common mode signal.
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Patent Agency Ranking
26.发明申请公开(公告)号：US20200343935A1
公开(公告)日：2020-10-29
申请号：US16927748
申请日：2020-07-13
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Rastislav Vazny , Ronald W. Dimpflmaier
Abstract: Systems, methods, and devices for operating in either frequency division duplexing (FDD) or time division duplexing (TDD) for wireless communications using the same electrical balance duplexer (EBD) circuitry in a transceiver device are provided. A series of switches may selectively couple components of the EBD, such as a low noise amplifier (LNA), a power amplifier (PA), and balancing impedance, to ground based on selected operation mode (e.g., FDD or TDD) while reducing insertion loss of the receiver (RX) and transmitter (TX) signals. Tuned matching network blocks for the LNA and PA may be used in addition to the series of switches to provide impedance matching for additional reduction of insertion loss.
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公开(公告)号：US12052047B2
公开(公告)日：2024-07-30
申请号：US18319664
申请日：2023-05-18
Applicant: Apple Inc.
Inventor： Andreas Menkhoff , Andreas Boehme , Bernhard Sogl , Jochen Schrattenecker , Joonhoi Hur
CPC classification number: H04B1/40 , H03K5/01 , H03K2005/00013
Abstract: An electronic device may include wireless circuitry. The wireless circuitry may include a quadratic phase generator for outputting a perfectly interpolated constant amplitude zero autocorrelation (CAZAC) sequence for a transmit path. The quadratic phase generator may include a numerically controlled oscillator, a switch controlled based on a value output from the numerically controlled oscillator, a first integrator stage, and a second integrator stage connected in series with the first integrator stage. The numerically controlled oscillator may receive as inputs a chirp count and a word length. The switch may be configured to switchably feed one of two input values that are a function of the chirp count and the word length to the first integrator stage. The quadratic phase generator may output full-bandwidth chirps or reduced-bandwidth chirps. Bandwidth reduction can be achieved by scaling the two input values of the switches.
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公开(公告)号：US11817896B2
公开(公告)日：2023-11-14
申请号：US17582872
申请日：2022-01-24
Applicant: Apple Inc.
Inventor： Nedim Muharemovic , Joonhoi Hur , Rastislav Vazny
CPC classification number: H04B1/48 , H03F3/245 , H03H7/42 , H03F2200/294 , H03F2200/451
Abstract: Embodiments disclosed herein relate to isolating a receiver circuit of an electronic device from a transmission signal and leakage of the transmission signal. To do so, an isolation circuit is disposed between the receiver circuit and a transmission circuit. The isolation circuit may include multiple variable impedance devices and one or more antennas. The impedances of the variable impedance devices may be balanced such that a signal at a particular frequency or within a particular frequency band can pass through or is blocked by the isolation circuit. The isolation circuit may include one or more double balanced duplexers to achieve the improved isolation. The isolation circuit may also increase bandwidth available for wireless communications of the electronic device.
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公开(公告)号：US20230353188A1
公开(公告)日：2023-11-02
申请号：US18218867
申请日：2023-07-06
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Joonhoi Hur , Rastislav Vazny
CPC classification number: H04B1/50 , H04B1/0053 , H03H11/344 , H03F3/245 , H03H11/342 , H03F2200/294 , H03F2200/451
Abstract: An electrical balance duplexer has multiple impedance gradients and multiple impedance tuners. The electrical balance duplexer transmits an outgoing signal from a transmitter during a transmission mode when a first set of impedance gradients of the multiple impedance gradients is operating in a first impedance state and a first set of impedance tuners of the multiple impedance tuners is operating in a second state. The electrical balance duplexer isolates the outgoing signal from a receiver during the transmission mode when a second set of impedance gradients of the multiple impedance gradients and a second set of impedance tuners of the multiple impedance tuners are operating in the second impedance state.
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公开(公告)号：US11700029B2
公开(公告)日：2023-07-11
申请号：US17836615
申请日：2022-06-09
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Joonhoi Hur , Rastislav Vazny
CPC classification number: H04B1/50 , H03F3/245 , H03H11/342 , H03H11/344 , H04B1/0053 , H03F2200/294 , H03F2200/451
Abstract: An electrical balance duplexer has multiple impedance gradients and multiple impedance tuners. The electrical balance duplexer transmits an outgoing signal from a transmitter during a transmission mode when a first set of impedance gradients of the multiple impedance gradients is operating in a first impedance state and a first set of impedance tuners of the multiple impedance tuners is operating in a second state. The electrical balance duplexer isolates the outgoing signal from a receiver during the transmission mode when a second set of impedance gradients of the multiple impedance gradients and a second set of impedance tuners of the multiple impedance tuners are operating in the second impedance state.
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