Amazon Technologies, Inc.

Jagan Vaidyanathan Rajagopalan

Akshay Mohan

Deepak Pai Hosadurga

In Chul Hyun

Rohit Sammeta

Mudit Sunilkumar Khasgiwala

Amit Shailesh Gaikwad

Mohammed Ziaul Azad

Duck Ho Bae

Yue Zheng

Ravi Ichapurapu

Morris Yuanhsiang Hsu

Chen Chen

Nathan Labadie

Sameet Ramakrishnan

Khaled Ahmad Obeidat

Sudheep Thota

Hariharan Muthukrishnan

Ming-Wei Liu

Peruvemba Ranganath Sai Ananthanarayanan

Ze Sun

Chunyu Wu

Jay Shah

Amit Galkwad

A wireless device may use two communication interfaces that utilize frequencies within the same band. As a result, a first communication interface such as an HDMI interface may interfere with operation of a second communication interface such as a WiFi interface. A conductive member is placed between the communication interfaces to reduce this interference. The conductive member has multiple slots, each slot having dimensions that cause resonance at a frequency used by the first communication interface. The number and spacing of the slots corresponds to the strength of signals used by the second communication interface. Placement of the conductive member between the first and second communication interfaces enables the conductive member to attenuate signals from the second communication interface that would interfere with the frequency used by the first communication interface.

Patterned housing element to reduce interference

A device such as an autonomous mobile device may include an extensible mast or other structure that changes length during operation. A cable between electronics at the ends of the structure includes a data line for signals and a power line for electrical power. A deployed length of the cable is determined and used to determine the phase of an antinoise signal that is radiated using the power line. The antinoise signal destructively interferes with at least a portion of the radiated noise from the data line, reducing the overall amplitude of the radiated noise. The deployed length may also be used to adjust other parameters, such as equalizer settings for one or more of a transmitter or receiver that is connected to the data line.

Electromagnetic noise cancellation apparatus for cable deployed at varying length

Technologies for dynamic noise cancelation using noise patterns are described. One device includes a moveable assembly having first and second degrees of freedom. A component within the base assembly radiates electromagnetic energy in a radiation pattern as a noise source when operating and an antenna, coupled to a receiver, is disposed on the support member. The processing device, using noise profile data about the radiation pattern of the noise source, determines that the component is operating and a current angle between the component and the antenna. The processing device determines a difference value between the current angle and the first angle and causes the moveable assembly to move at least one of the antenna or the base assembly according to the difference value.

Dynamic noise cancellation using noise patterns

A streaming media player includes a printed circuit board, a video processor, a wireless communications processor, and a patch antenna. The patch antenna includes dielectric material, a conductive patch, and a first antenna feed in a first position with respect to the conductive patch. The patch antenna includes a second antenna feed in a second position with respect to the conductive patch. The first position is orthogonal to the second position. In an embodiment, the second position is rotationally offset from the first position by 90 degrees around an axis through a center of the conductive patch. The streaming media player includes a connector coupled to the video processor and configured to removably couple to a connection port on a display device.

Media device with on-board patch antenna with dual antenna feeds

A device includes a substrate and a video processor on the substrate. A first patch antenna is mounted to the substrate and configured to transmit and receive radio frequency signals in a frequency range. The first patch antenna is closer to a first end of the substrate than a second end of the substrate. A second patch antenna is mounted to the substrate and is configured to transmit and receive radio frequency signals in the frequency range. The second patch antenna is closer to the first end of the substrate than the second end of the substrate. The substrate includes a ground isolation region between at least one of the first patch antenna and the second patch antenna and the video processor. A media connector is on the substrate and electrically connected to the video processor.

Media device with on-board patch antennas

Systems, methods, and computer-readable media are disclosed for using shared antennas for multi-protocol communication. Example devices may include a first antenna, a second antenna, memory and at least one processor configured to access the memory and execute computer-executable instructions to determine a first request for a first wireless radio to transmit first data for a first duration, determine a second request for a second wireless radio to receive second data during the first duration, and determine that a first signal strength associated with the first wireless radio is less than or equal to a first threshold. Certain embodiments may be configured to determine that communication associated with the first wireless radio has a higher priority than communication associated with the second wireless radio, cause the first wireless radio to transmit the first data using a first antenna for the first duration, and cause a second antenna to be idle.

Methods and systems for using shared antennas for multi-protocol communication

Systems, methods, and computer-readable media are disclosed for streaming media content. The systems, methods, and computer-readable media described herein may improve user experiences and reduce device failures by mitigating problems between devices. In an example method described herein, a media streaming device may be connected to a display device in order to facilitate streaming of content. A processing apparatus of the media streaming device may determine that the display device is not presenting content streamed from the media streaming device and in turn switch the antenna radiation pattern from a first pattern to a second pattern.

Media streaming devices with noise mitigation

High-speed data connectors having a variety of different implementations to address unwanted electromagnetic radiation and interference are described. In some instances, resonant unit structures are added within the existing connector cavity that absorb and dampen unwanted electromagnetic radiation. In other instances, resonant unit structures are added to the exterior of the connector to reduce and eliminate surface currents that can occur on the solid metal shield of the connector. In these and other instances, the resonant unit structure can be formed from a stacked structure having a resonant structure arranged in close proximity to some of the connector pins to absorb unwanted radiation from those pins. The absorbed energy is transferred to ground through other components in the stack. In still other instances, various different materials are provided to replace the conventional plastic material that is used to keep the connector pins in place and in alignment. The different materials can absorb unwanted electromagnetic radiation, and can be selected to address particular frequency ranges.

Low noise high-speed data connectors

A user device includes an unpowered display and a touch sensor. User input such as touching or writing on the unpowered display with a stylus produces visual indicia indicative of the input. A touch sensor is used to acquire touch data indicative of the user input. The touch data may be sent wirelessly to another device, such as a server for further processing.

Touch enabled user device with unpowered display

An apparatus includes a circuit board including a contact pad. The circuit board includes one or more chips on the circuit board. The circuit board further includes a signal pin having a first end, a second end, and an intermediate portion between the first end and the second end. The first end of the signal pin is in contact with the contact pad, where the signal pin has a resonant frequency outside a predetermined frequency range. The apparatus includes a lossy dielectric material surrounding the intermediate portion of the signal pin, where the lossy dielectric material is configured to absorb radio frequency signals from the signal pin in the predetermined frequency range.

Device connector with reduced electromagnetic noise

A device is described. The device includes a data interface connector, an application processor, and interface circuitry. The application processor can receive signals via an antenna. The interface circuitry can be coupled between the application processor and the data interface connector. The data interface circuitry can determine a change in a signal property of one of the signals, the change being caused by an impedance mismatch between the data interface connector and a media consumption device. The data interface circuitry can also send the application processor a signal property setting corresponding with the change. The application processor can adjust the signal property of a subsequent one of the signals, in response to the signal property setting from the interface circuitry, to obtain an adjusted signal. The application processor can also send the adjusted signal to the media consumption device.

Adaptive impedance matching interface

A processing device detects an occurrence of the first set of use conditions associated with a power supply line coupled between a power source and a power sink in a user device. The processing device sets a tunable decoupling capacitor on the power supply line to a first capacitance value to reduce a level of electromagnetic interference on the power supply line at a first frequency corresponding to the first capacitance value. When the processing device detects a change from the first set of use conditions associated with the power supply line to a second set of use conditions, the processing device sets the tunable decoupling capacitor to a second capacitance value to reduce a level of electromagnetic interference on the power supply line at a second frequency corresponding to the second capacitance value.

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San Jose, CA, United States of America

Jagan Vaidyanathan Rajagopalan