Abstract: Disclosed is a system for reducing or eliminating interference during communication. Disclosed is a system to position an implantable medical device at an orientation or position to reduce or eliminate interference. Therefore, a communication may be maintained with the IMD over a selected period of time.

Abstract: RF communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter that transmits a transmit signal through a first front end circuit, a receiver that processes a receive signal from a second front end circuit, and a feedback receiver that processes a feedback signal from the first front end circuit to generate a digital interference cancellation signal that compensates the receiver for interference arising from the transmitter.

Abstract: Described are methods and apparatuses pertaining to stacked integrated circuits having application in ultra-low-power and small form factor design, with fast prototyping and mass-production cycle time, including application for millimeter wave radio frequency circuits.

Abstract: One variation of a device case includes a device case body: configured to accept and retain a mobile device; defining a strap receptacle; and including a first set of magnetic features arranged across a base surface of the strap receptacle. The device case further includes a strap: coupled to the device case body; configured to seat within the strap receptacle in a retracted position; configured to accept a finger of a user in a deployed position; and including a second set of magnetic features configured to transiently couple to the first set of magnetic features to drive the strap from the deployed position to the retracted position and to retain the strap within the strap receptacle in the retracted position.

Abstract: The present disclosure relates to systems and methods for operating a control signal to communicate signals using a first antenna and a first frequency band in response to determining that intra-device operations are occurring or are expected to occur, that a first amount of energy received by the first antenna is less than a threshold amount of energy, and that the first antenna is unaffected by the intra-device operations. The control signal may also delay communication of the signals in response to determining that intra-device operations are occurring, and that first amount of energy is greater than or equal to the threshold amount of energy.

Abstract: In an embodiment, an apparatus includes a transmit section including a first baseband section and a first radio frequency (RF) section, wherein the transmit section is configured to receive a calibration signal, the first RF section is configured to generate a RF calibration signal based on modulating the calibration signal. The calibration signal comprises an orthogonal code based signal; and a receive section configured to receive the RF calibration signal over-the-air, the receive section includes a second RF section and a calibration section, the second RF section is configured to generate a received calibration signal based on the RF calibration signal, the received calibration signal and a reference signal associated with the RF calibration signal comprise inputs to the calibration section and the calibration section is configured to determine one or more of gain, baseband delay, or RF delay compensation values, based on the inputs, to calibrate the transmit section.

Abstract: A radio frequency switch has an antenna end, a first signal end for transmitting a first radio frequency signal, a second signal end for transmitting a second radio frequency signal, a third signal end for transmitting a third radio frequency signal, a first series path having a first switch, a second series path having a second switch, a third series path having a third switch, a first shunt path coupled between the first signal end and a node, a second shunt path coupled between the second signal end and the node, a common path coupled between the node and a first reference voltage end, and a third shunt path coupled between the third signal end and a second reference voltage end. The first series path and the second series path are connected to a common ground pad via the common path.

Abstract: A radio frequency module and a communication device capable of reducing a mounting substrate size. The radio frequency module includes a mounting substrate, a first filter, and a second filter. The mounting substrate has a first main surface and a second main surface that are on opposite sides of the mounting substrate. The first filter is provided on the first main surface and allows a first receiving signal in a first frequency band to pass through. The second filter is stacked on the first filter and allows a second receiving signal in a second frequency band different from the first frequency band to pass through.

Abstract: A duplexer may be used to isolate a transmitter and a receiver that share a common antenna. By using impedance gradients to provide impedances that cause balance-unbalance transformers (balun) of the duplexer to cut-off access to the common antenna rather than duplicate the antenna impedance, the duplexer is balanced. Such cut-offs may have a lower insertion loss than a duplexer that merely duplicates the antenna impedance to separate the differential signals of the receiver and transmitter from the common mode signal.

Abstract: An information processing apparatus includes an acquisition unit that acquires first communication information for connecting with an apparatus via a first network and second communication information for connecting with the apparatus via a second network, a determination unit that determines whether communication between an information processing apparatus and the apparatus via the first network based on the first communication information is possible, a connection unit that connects the information processing apparatus with the apparatus via the second network based on the second communication information when the communication via the first network is impossible, and a request unit that transmits a processing request to the apparatus via the first network when the communication via the first network is possible, and transmits the processing request to the apparatus via the second network when the information processing apparatus is connected with the apparatus via the second network.

Abstract: A radio frequency module includes: a transmission power amplifier that includes a plurality of amplifying elements that are cascaded; a reception low noise amplifier; and a module board on which the transmission power amplifier and the reception low noise amplifier are mounted. The plurality of amplifying elements include: an amplifying element disposed most downstream; and an amplifying element disposed upstream of the amplifying element, and in a plan view of the module board, a conductive member is physically disposed between the amplifying element and the reception low noise amplifier.

Abstract: Provided is a system for communication. The system includes: a basic function module; at least one extended function module; a first near-field communication transceiving unit and a first near-field communication antenna unit, located on the basic function module; and at least one second near-field communication transceiving unit and at least one second near-field communication antenna unit, located on each of the at least one extended function module. The first near-field communication antenna unit and the at least one second near-field communication antenna unit respectively comprise a first loop antenna and a second loop antenna which are printed on a printed circuit board.

Abstract: A radio frequency circuit with font routing to replace a resistor includes a routing layer and a ground layer. The routing layer includes a first pad, a second pad and a font routing unit. The second pad is corresponding to the first pad. The font routing unit is connected between the first pad and the second pad, and has a trace width. The trace width is less than a 50 ohm trace width. The ground layer is disposed below the routing layer and is separated from the routing layer by a height. The font routing unit has a second equivalent impedance at the radio frequency, the second equivalent impedance is determined according to the trace width, the height and the radio frequency, and the second equivalent impedance is the same or similar to a first equivalent impedance.

Abstract: A multi-band radio frequency front-end device, a multi-band receiver, and a multi-band transmitter, the multi-band radio frequency front-end device including a first radio frequency front-end circuit, where the first radio frequency front-end circuit works on a first band, a second radio frequency front-end circuit, where the second radio frequency front-end circuit works on a second band, a first input/output matching network, and a second input/output matching network, where routing of the first input/output matching network and routing of the second input/output matching network on a layout are annular and nested.

Abstract: Methods, devices, and system related to wireless communications are disclosed. In one example aspect, a device for wireless communication includes a processor that is configured to determine an estimation of an interference signal for a connection between the device and a receiving device in a wireless communication system, construct an interference elimination signal based on the estimation of the interference signal, and perform a data transmission to the receiving device with the interference elimination signal to enable the receiving device to eliminate the interference signal in the data transmission. The estimation of the interference signal is determined by building a probabilistic model of the interference signal using at least an interference template associate with a characteristic of the device or one or more measurements of a channel condition collected within a predefined observation window.

Abstract: A contactless integrated circuit (IC) card reader configured to communicate with a contactless IC card includes an antenna circuit, a variable amplifier that amplifies a carrier signal at an amplification gain and outputs the amplified carrier signal to the antenna circuit as a transmit signal, a variable attenuator that attenuates a receive signal received through the antenna circuit at an attenuation ratio, and a controller that controls the amplification gain and the attenuation ratio based on the attenuated receive signal.

Abstract: A radio frequency module includes a module board, a transmission power amplifier, a first inductance element mounted on a first principal surface and connected to an output terminal of the transmission power amplifier, a reception low-noise amplifier, and a second inductance element mounted on a first principal surface connected to an input terminal of the reception low-noise amplifier. In a plan view of the module board, a conductive member mounted on the first principal surface is disposed between the first inductance element and the second inductance element.

Abstract: Various embodiments relate to an electronic device and a method for preventing interference between signals transmitted and received through first and second antennas.

Abstract: An acoustic impedance matching device can facilitate acoustic transmission across an interface formed by materials having a very large acoustic impedance mismatch (e.g. air-water, or air-elastic polymer). The device can include a first medium. The first medium can have a first acoustic impedance. The device can include a second medium. The second medium can have a second acoustic impedance. The second acoustic impedance can be substantially greater than the first acoustic impedance. Thus, the first acoustic impedance and the second acoustic impedance are substantially mismatched. An interface can be defined between the first medium and the second medium. A bubble can be located in the second medium or the interface. The bubble can act as a resonator and can enable efficient sound transmission despite the large impedance mismatch of the first medium and the second medium.

Abstract: Methods and circuits for reducing power dissipation in wireless transceivers and other electronic circuits and systems. Embodiments of the present invention use bias current reduction, impedance scaling, and gain changes either separately or in combination to reduce power dissipation. For example, bias currents are reduced in response to a need for reduced signal handling capability, impedances are scaled thus reducing required drive and other bias currents in response to a strong received signal, or gain is increased and impedances are scaled in response to a low received signal in the presence of no or weak interfering signals.