Amazon Technologies, Inc.

Mark Corbridge

Ming Zheng

Khaled Ahmad Obeidat

Cheng-Jung Lee

Joseph Christopher Modro

Michael M Lee

Nagendra Bage Jayaraj

Zhaojun Cheng

Khaled A Obeldat

Antenna structures and methods of operating the same of a dual-loop-slot antenna of an electronic device are described. One dual-loop-slot antenna includes a first loop antenna coupled to a radio frequency (RF) feed and a ground plane, a second loop coupled to the RF feed and the ground plane. At least a portion of the second loop antenna is formed by the first loop antenna. The dual-loop-slot antenna also includes a slot antenna formed at least in part by a portion of at least one of the first loop antenna or the second loop antenna.

Dual-loop-slot antenna

Methods and systems of detecting objects in proximity to user devices and distinguishing between object types are described. One method includes measuring a magnitude of mutual coupling between two antennas of the user device using a transmitted signal by a first antenna and a received signal by a second antenna. The method distinguishes between the user device being proximate to free space, a first object type or a second object type using the magnitude of mutual coupling or magnitude of received signal strength. The first object type includes non-water-based objects that do not absorb electromagnetic radiation and the second object type includes objects that absorb electromagnetic radiation.

Proximity sensor using antennas of a user device

A user device includes a conductive structure coupled to a receiver and a sensor. The conductive structure is configured to operate as an antenna for the receiver and as a sensor pad for the sensor.

Conductive structure for use as sensor pad and antenna

Methods and systems for selecting one of a plurality of antennas to be used as a transmit antenna based on an orientation of a user device are described. A user device determines an orientation of the user device, and selects one of multiple antennas to use as a first transmit antenna based on the orientation of the user device. The user device transmits information using the first transmit antenna.

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Los Gatos, CA, United States of America

Mark Corbridge