Abstract: Microwave interference mitigation techniques and systems are disclosed herein. In some embodiments, microwave interference mitigation involves coordinating wireless traffic in accordance with a magnetron's on-and-off cycle so that data is not sent during the magnetron's on period, and is exclusively sent during the magnetron's off period. Wireless traffic can be coordinated using a voltage monitoring and zero-crossing point detection technique coupled with a Clear To Send (CTS) packet. For non-microwave devices, wireless traffic coordination can be achieved using a pattern matching algorithm coupled with a Clear Channel Assessment (CCA) threshold adjustment during the magnetron's on-and-off cycles. Additional, or alternative, microwave interference mitigation techniques involve decreasing a maximum packet size for data packets that are to be transmitted wirelessly in the environment, which guarantees successful transmission of data packets during the magnetron's off periods.

Abstract: Antenna structures and methods of operating the same are described. One apparatus includes a processing device that executes an active interference cancellation (AIC) algorithm and radio frequency front-end (RFFE) circuitry coupled to the processing device. The RFFE circuitry includes two RF couplers, and a programmable-delay filter and a vector modulator disposed along electrical path. The AIC algorithm is operable to control the programmable-delay filter to match a delay of the electrical path to a propagation delay in an antenna path. The AIC algorithm is operable to control the vector modulator to adjust a phase, an amplitude or both of a copy of a first RF signal transmitted via the first antenna to generate a second RF signal. The second RF signal is added to a third RF signal via the second RF coupler to remove from the third RF signal interference caused by the first RF signal.

Abstract: An apparatus includes a non-conductive sheet, an electrically conductive coil disposed on the non-conductive sheet, and an electronic component. The non-conductive sheet has a first surface, a second surface opposite the first surface, and a third surface extending from the first surface to the second surface, the third surface defining an opening. The electrically conductive coil surrounds the third surface and the third surface surrounds the electronic component, the electronic component being disposed within the opening.

Abstract: An apparatus includes a non-conductive sheet, an electrically conductive coil disposed on the non-conductive sheet, and an electronic component. The non-conductive sheet has a first surface, a second surface opposite the first surface, and a third surface extending from the first surface to the second surface, the third surface defining an opening. The electrically conductive coil surrounds the third surface and the third surface surrounds the electronic component, the electronic component being disposed within the opening.

Abstract: Methods and systems for radiating electromagnetic energy with a direct-feed patch antenna are described. The direct-feed patch antenna may be formed of a metal member of the user device and is grounded to the ground plane at a ground point disposed in relation to a feed location of the direct-feed patch antenna, the feed location to be directly coupled to receive a radio frequency (RF) signal. The direct-feed patch antenna is configured to radiate electromagnetic energy in response to the RF signal.

Abstract: An electronic device including a Near Field Communication (NFC) antenna and a Radio-Frequency Identification (RFID) tag. The RFID tag may be disposed within an inner region of the antenna that does not contain structural features of the antenna.