-
公开(公告)号：US20240088921A1
公开(公告)日：2024-03-14
申请号：US17945023
申请日：2022-09-14
申请人： Apple Inc.
CPC分类号： H04B1/0057 , H04B1/04 , H04B1/10
摘要： 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.
-
公开(公告)号：US20240305438A1
公开(公告)日：2024-09-12
申请号：US18435812
申请日：2024-02-07
申请人： Apple Inc.
发明人： Josef W. Koller , Bjoern Lenhart , Dominic Koehler
摘要： A communication device includes an antenna tracker having a circuit architecture that includes at least one L-C resonance circuit component with an adjustable resonance frequency value. In particular, each of the L-C resonance circuit components may include a tunable capacitor and an inductor coupled in parallel. The antenna tracker may be single-ended and include at least one ground coupling, while in some embodiments, the antenna tracker may be differential. The circuit architecture of the antenna tracker may enable the antenna tracker to increase an impedance coverage range of the communication device, thus increasing a range of impedance within which an antenna impedance may be effectively tracked and matched, enabling effective isolation between the transmitter and receiver across an increased range of antenna impedance.
-
公开(公告)号：US20240080063A1
公开(公告)日：2024-03-07
申请号：US17939657
申请日：2022-09-07
申请人： Apple Inc.
发明人： Christof Pfannenmüller , Dominic Koehler , Julian W Zuber , Oliver Georg Dorn , Bjoern Lenhart , Harald Pretl , Rastislav Vazny , Christian F Tanzer
CPC分类号： H04B1/50 , H03H7/487 , H04B1/0475 , H04B1/1027
摘要： 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).
-
公开(公告)号：US20240097657A1
公开(公告)日：2024-03-21
申请号：US17946629
申请日：2022-09-16
申请人： Apple Inc.
发明人： Josef W Koller , Bjoern Lenhart , Dominic Koehler , Rastislav Vazny , Joonhoi Hur , Harald Pretl
CPC分类号： H03J3/20 , H04B1/18 , H03J2200/06
摘要： In electronic devices used in radio-frequency communications, impedance matching may result in desirable operating conditions. However, impedance of the antenna may change over time (e.g., due to frequency of signals being transmitted or received, due to ambient conditions, due to age of antenna or related components). Accordingly, it may be desirable to employ antenna tracking circuitry that may operate as an impedance matching network to dynamically match the antenna impedance. To dynamically match the antenna impedance, the matching network may include tunable components. To provide fast, dynamic, and effective impedance matching, antenna tracking circuitry having an architecture with analytically determinable impedance (e.g., determinable via one or more equations) may be implemented. The antenna tracking circuitry may include a variable resistor and three variable impedances. The three variable impedances may include components capable of tuning capacitor ranges of the three variable impedances, among other characteristics of the antenna tracking circuitry.
-
公开(公告)号：US20240080008A1
公开(公告)日：2024-03-07
申请号：US17939616
申请日：2022-09-07
申请人： Apple Inc.
发明人： Christof Pfannenmüller , Dominic Koehler , Julian W Zuber , Oliver Georg Dorn , Bjoern Lenhart , Harald Pretl , Rastislav Vazny , Christian F Tanzer
CPC分类号： H03H7/487 , H04B1/1027 , H04B1/40
摘要： 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).
-
-
-
-
搜索结果
5 条记录 (耗时 0.012 秒)
