公开(公告)号：US10186769B1

公开(公告)日：2019-01-22

申请号：US15655098

申请日：2017-07-20

Applicant: Apple Inc.

Inventor： James G. Judkins ,  Jing Zhu ,  Liang Han ,  Matthew A. Mow ,  Mattia Pascolini ,  Ming-Ju Tsai ,  Thomas E. Biedka ,  Victor C. Lee ,  Xu Han

IPC: H01Q1/52 ,  H04B1/04 ,  H04L25/08

Abstract: An electronic device may be provided with control signal generation circuitry that generates a differential pair of control signals, power supply circuitry that generates a bias voltage, and an antenna having a tuning circuit. First switching circuitry may be coupled to the power supply circuitry and the control signal generation circuitry. Second switching circuitry may be coupled to the tuning circuit. A pair of control lines may be coupled between the first and second switching circuitry. In a first switching mode, the power supply circuitry may transmit the bias voltage to the tuning circuit over one of the control lines. The bias voltage may charge storage circuitry coupled to the tuning circuit. In a second switching mode, the control signal generation circuitry may transmit the differential pair of control signals to the tuning circuit. The tuning circuit may be powered by the storage circuitry in the second switching mode.

公开(公告)号：US20180342794A1

公开(公告)日：2018-11-29

申请号：US15602972

申请日：2017-05-23

Applicant: Apple Inc.

Inventor： Liang Han ,  Thomas E. Biedka ,  Matthew A. Mow ,  Iyappan Ramachandran ,  Mattia Pascolini ,  Xu Han ,  Hao Xu ,  Jennifer M. Edwards ,  Salih Yarga ,  Yijun Zhou

IPC: H01Q1/24 ,  H01Q5/35 ,  H04W4/02 ,  H04B1/401

CPC classification number: H01Q1/245 ,  H01Q1/243 ,  H01Q5/328 ,  H01Q5/35 ,  H01Q9/42 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/401 ,  H04W4/026 ,  H04W88/06

Abstract: An electronic device may include an antenna having a resonating element, an antenna ground, and a feed. First and second tunable components may be coupled to the resonating element. Adjustable matching circuitry may be coupled to the feed. Control circuitry may use the first tunable component to tune a midband antenna resonance when sensor circuitry identifies that the device is being held in a right hand and may use the second tunable component to tune the midband resonance when the sensor circuitry identifies that the device is being held in a left hand. For tuning a low band resonance, the control circuitry may place the antenna in different tuning states by sequentially adjusting a selected one of the matching circuitry and the tunable components, potentially reverting to a previous tuning state at each step in the sequence. This may ensure that antenna efficiency is satisfactory regardless of antenna loading conditions.

公开(公告)号：US08995926B2

公开(公告)日：2015-03-31

申请号：US13629414

申请日：2012-09-27

Applicant: Apple Inc.

Inventor： Matthew A. Mow ,  Thomas E. Biedka ,  Ming-Ju Tsai ,  Liang Han ,  Xu Han ,  Anand Lakshmanan ,  Nanbo Jin ,  Hongfei Hu ,  Dean F. Darnell ,  Joshua G. Nickel ,  Jayesh Nath ,  Yijun Zhou ,  Hao Xu ,  Yuehui Ouyang ,  Nirali Shah ,  Mattia Pascolini ,  Robert W. Schlub ,  Ruben Caballero

IPC: H04B17/00 ,  H04W24/00 ,  H04W24/06

CPC classification number: H04W24/08 ,  H04B17/318 ,  H04B17/345 ,  H04W24/06

Abstract: Radio frequency test systems for characterizing antenna performance in various radio coexistence scenarios are provided. In one suitable arrangement, a test system may be used to perform passive radio coexistence characterization. During passive radio coexistence characterization, at least one signal generator may be used to feed aggressor signals directly to antennas within an electronic device under test (DUT). The aggressor signals may generate undesired interference signals in a victim frequency band, which can then be received and analyzed using a spectrum analyzer. During active radio coexistence characterization, at least one radio communications emulator may be used to communicate with a DUT via a first test antenna. While the DUT is communicating with the at least one radio communications emulator, test signals may also be conveyed between DUT 10 and a second test antenna. Test signals conveyed through the second test antenna may be used in obtaining signal interference level measurements.

Abstract translation: 提供了用于在各种无线电共存场景中表征天线性能的射频测试系统。 在一种合适的布置中，可以使用测试系统来执行被动无线电共存表征。 在被动无线电共存表征期间，可以使用至少一个信号发生器来将攻击者信号直接馈送到被测电子设备（DUT）内的天线。 攻击者信号可能在受害频段中产生不期望的干扰信号，然后使用频谱分析仪接收和分析。 在有源无线电共存表征期间，可以使用至少一个无线电通信仿真器来经由第一测试天线与DUT进行通信。 当DUT正在与至少一个无线电通信仿真器进行通信时，也可以在DUT 10和第二测试天线之间传送测试信号。 通过第二测试天线传送的测试信号可用于获得信号干扰电平测量。