-
公开(公告)号：US12176877B2
公开(公告)日：2024-12-24
申请号：US17480885
申请日：2021-09-21
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Joonhoi Hur , Rastislav Vazny
Abstract: Embodiments presented herein relate to isolating a receiver circuit of an electronic device from a transmission signal and from a noise signal at a frequency range of a received 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 and the one or more antennas may be balanced such that the receiver circuit is effectively removed from the transceiver circuitry and isolated from the transmission signal. The impedance of the variable impedance devices and the one or more antennas may also be configured to isolate the receiver circuit from a noise signal generated at the transmission circuit having a frequency in the range of the receive signal.
-
公开(公告)号：US20230075465A1
公开(公告)日：2023-03-09
申请号：US17468482
申请日：2021-09-07
Applicant: Apple Inc.
Inventor： Andreas Menkhoff , Andreas Boehme , Bernhard Sogl , Jochen Schrattenecker , Joonhoi Hur
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.
-
公开(公告)号：US20230006629A1
公开(公告)日：2023-01-05
申请号：US17366692
申请日：2021-07-02
Applicant: Apple Inc.
Inventor： Björn Lenhart , Joonhoi Hur , Harald Pretl , Rastislav Vazny
Abstract: This disclosure provides techniques for impedance matching. A radio frequency (RF) device includes a power detector to determine a transmitter leakage and a post-processing unit to determine a receiver leakage, and determines if isolation is acceptable based on the leakages. The RF device may include a device for measuring antenna impedance. Otherwise, the RF device may select multiple tuner settings (e.g., capacitor values) for test signals to be transmitted and received at a target frequency, determine multiple sets of leakage values, determine multiple reflection coefficients based on the multiple sets of leakage values, and determine an estimated antenna impedance at the target frequency based on the reflection coefficients. The RF device then determines impedance tuner settings based on the measured or estimated antenna impedance. Alternatively, the RF device determines impedance tuner settings using an inverse machine-learning model based on a determined matching impedance.
-
公开(公告)号：US20220381900A1
公开(公告)日：2022-12-01
申请号：US17332221
申请日：2021-05-27
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Andreas Menkhoff , Bernhard Sogl , Jochen Schrattenecker , Rastislav Vazny
Abstract: An electronic device may include a voltage standing wave ratio (VSWR) sensor disposed along a radio-frequency transmission line between a signal generator and an antenna. The VSWR sensor may gather VSWR measurements from radio-frequency signals transmitted by the signal generator over the transmission line. Control circuitry may identify a variation in the VSWR measurements over time and may compare the variation to a threshold value to determine whether an external object in the vicinity of the antenna is animate or inanimate. The control circuitry may reduce the maximum transmit power level of the antenna when the external object is animate and may maintain or increase the maximum transmit power level when the external object is inanimate. This may serve to maximize the wireless performance of the electronic device while also ensuring that the device complies with regulatory limits on radio-frequency energy exposure.
-
公开(公告)号：US20220302900A1
公开(公告)日：2022-09-22
申请号：US17833544
申请日：2022-06-06
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Rastislav Vazny , Ronald W. Dimpflmaier
Abstract: Systems, methods, and devices for reducing insertion loss and/or swapping transmitter (TX) and receiver (RX) frequencies in an electrical balance duplexer (EBD) used in a transceiver device for frequency division duplexing (FDD) applications are provided. Feed-forward receiver path from the antenna to a low noise amplifier (LNA) and a feed-forward path from the antenna to a power amplifier (PA) of the EBD may be used for reducing insertion loss of the RX and TX signals. In some embodiments, switches may be used to selectively alter operational modes for varied levels of isolation and/or swapping of TX and RX frequencies.
-
Patent Agency Ranking
公开(公告)号：US20220116009A1
公开(公告)日：2022-04-14
申请号：US17480885
申请日：2021-09-21
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Joonhoi Hur , Rastislav Vazny
Abstract: Embodiments presented herein relate to isolating a receiver circuit of an electronic device from a transmission signal and from a noise signal at a frequency range of a received 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 and the one or more antennas may be balanced such that the receiver circuit is effectively removed from the transceiver circuitry and isolated from the transmission signal. The impedance of the variable impedance devices and the one or more antennas may also be configured to isolate the receiver circuit from a noise signal generated at the transmission circuit having a frequency in the range of the receive signal.
-
公开(公告)号：US20220116008A1
公开(公告)日：2022-04-14
申请号：US17067017
申请日：2020-10-09
Applicant: Apple Inc.
Inventor： Oliver Georg Dorn , Joonhoi Hur , Rastislav Vazny
Abstract: Embodiments presented herein relate to isolating a receiver circuit of an electronic device from a transmission signal and from a noise signal at a frequency range of a received 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 and the one or more antennas may be balanced such that the receiver circuit is effectively removed from the transceiver circuitry and isolated from the transmission signal. The impedance of the variable impedance devices and the one or more antennas may also be configured to isolate the receiver circuit from a noise signal generated at the transmission circuit having a frequency in the range of the receive signal.
-
公开(公告)号：US20220038122A1
公开(公告)日：2022-02-03
申请号：US17481114
申请日：2021-09-21
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.
-
公开(公告)号：US10938542B1
公开(公告)日：2021-03-02
申请号：US16582769
申请日：2019-09-25
Applicant: Apple Inc.
Inventor： Nedim Muharemovic , Joonhoi Hur , Rastislav Vazny
IPC: H04L25/03 , H04B1/525 , H04B1/04 , H04B1/16 , H04B1/58 , H03H7/40 , H04L5/14 , H03H7/42 , H03H11/28 , H03H11/34
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.
-
公开(公告)号：US10833723B2
公开(公告)日：2020-11-10
申请号：US16356855
申请日：2019-03-18
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Rastislav Vazny , Ronald William Dimpflmaier
Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which isolation between transmission signals and received signals in a transceiver may be maintained during downlink carrier aggregation. More specifically, in some embodiments, the transceiver may be implemented to include an electrical balance duplexer that isolates a signal component of a signal transmitted via the transceiver from a receiver signal path of the transceiver. The transceiver may also include analog interference cancellation circuitry implemented to isolate a noise component of the signal transmitted via the transceiver from the receiver signal path (e.g., from one or more downlink receiver channels). As such, the transceiver may operate using inter-band, non-contiguous downlink carrier aggregation, intra-band, non-contiguous downlink carrier aggregation, intra-band, contiguous carrier aggregation, and/or the like.
-
-
-
-
-
-
-
-
-
Search Results
80
records
(took 0.026 seconds)
