公开(公告)号：US11368181B2

公开(公告)日：2022-06-21

申请号：US16916914

申请日：2020-06-30

Applicant: Apple Inc.

Inventor： Oliver Georg Dorn ,  Joonhoi Hur ,  Rastislav Vazny

IPC: H04B1/50 ,  H04B1/00 ,  H03H11/34 ,  H03F3/24

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.

公开(公告)号：US20220182079A1

公开(公告)日：2022-06-09

申请号：US17582872

申请日：2022-01-24

Applicant: Apple Inc.

Inventor： Nedim Muharemovic ,  Joonhoi Hur ,  Rastislav Vazny

IPC: H04B1/00 ,  H04L5/14

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.

公开(公告)号：US11356078B2

公开(公告)日：2022-06-07

申请号：US17073590

申请日：2020-10-19

Applicant: Apple Inc.

Inventor： Joonhoi Hur ,  Rastislav Vazny ,  Ronald W. Dimpflmaier

IPC: H03H9/72 ,  H03H7/46 ,  H04L5/14 ,  H04B1/12 ,  H03H9/145 ,  H03H9/64 ,  H04B1/52 ,  H04B1/38

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.

公开(公告)号：US20220078060A1

公开(公告)日：2022-03-10

申请号：US17480909

申请日：2021-09-21

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.

公开(公告)号：US11265038B1

公开(公告)日：2022-03-01

申请号：US17116360

申请日：2020-12-09

Applicant: Apple Inc.

Inventor： Nedim Muharemovic ,  Joonhoi Hur ,  Rastislav Vazny

IPC: H04B1/48 ,  H03H7/42 ,  H03F3/24

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.

公开(公告)号：US20210091917A1

公开(公告)日：2021-03-25

申请号：US16582769

申请日：2019-09-25

Applicant: Apple Inc.

Inventor： Nedim Muharemovic ,  Joonhoi Hur ,  Rastislav Vazny

IPC: H04L5/14 ,  H04B1/04 ,  H04B1/16 ,  H03H11/28 ,  H03H11/34 ,  H03H7/42

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：US20210036688A1

公开(公告)日：2021-02-04

申请号：US17073590

申请日：2020-10-19

Applicant: Apple Inc.

Inventor： Joonhoi Hur ,  Rastislav Vazny ,  Ronald W. Dimpflmaier

IPC: H03H9/72 ,  H03H7/46 ,  H04L5/14 ,  H04B1/12 ,  H03H9/145 ,  H03H9/64 ,  H04B1/52 ,  H04B1/38

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.

公开(公告)号：US10826545B1

公开(公告)日：2020-11-03

申请号：US16582783

申请日：2019-09-25

Applicant: Apple Inc.

Inventor： Rastislav Vazny ,  Joonhoi Hur

IPC: H04B1/10 ,  H01Q1/52 ,  H04B7/0413 ,  H01Q21/00 ,  H04B7/08

Abstract: Systems and methods for extracting polarized sub-signals from a dual-polarized signal includes isolating the polarized sub-signals using one or more filters. When a single filter is used to derive a first sub-signal, analog interference cancellation may be used to derive the second sub-signal. When two filters are used, the first and second sub-signals may each be derived using a corresponding filter.

公开(公告)号：US20200106474A1

公开(公告)日：2020-04-02

申请号：US16145857

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Joonhoi Hur ,  Rastislav Vazny ,  Ronald W. Dimpflmaier

IPC: H04B1/58 ,  H04B1/44 ,  H04B1/525 ,  H03H7/46 ,  H04L5/14 ,  H04B1/04

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.

公开(公告)号：US10541716B1

公开(公告)日：2020-01-21

申请号：US16146064

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Rastislav Vazny ,  Joonhoi Hur ,  Ronald W. Dimpflmaier

IPC: H04B1/40 ,  H04B1/405 ,  H04B1/18 ,  H04B17/16 ,  H03F3/195

Abstract: Systems and methods for improving operational efficiency of a radio frequency system, which includes an antenna amplifier unit that amplifies a data stream while the data stream is being wirelessly communicated and another antenna amplifier unit that amplifies another data stream while the other data stream is being wirelessly communicated. The radio frequency system includes a transceiver amplifier unit coupled to the antenna amplifier unit via an electrical connector, in which the transceiver amplifier unit amplifies the data stream while the data stream is being wirelessly communicated, another transceiver amplifier unit coupled to the other antenna amplifier unit via another electrical connector, in which the other transceiver amplifier unit amplifies the other data stream while the other data stream is being wirelessly communicated, and an electrical connector switching device coupled between antenna-sides of the electrical connector and the other electrical connector.