Abstract: A radio frequency module includes: a power amplifier; an inductor connected between the power amplifier and a power-supply terminal to supply a power-supply voltage to the power amplifier; a capacitor connected between a ground and a node that is located between the inductor and the power-supply terminal; a module substrate including a first principal surface and a second principal surface opposite to each other; and a plurality of post electrodes disposed on the second principal surface. Here, the inductor is disposed on the first principal surface or inside of the module substrate, and at least one of the power amplifier or the capacitor is disposed on the second principal surface.

Abstract: There is provided mechanisms for mitigating interference in a communications network. A method is performed by a network node. The method comprises obtaining a packet. The packet has been wirelessly received in an uplink direction by a transmission and reception point of the network node and from a packet sender. The packet is indicative of scheduled transmission of a further packet within a predefined time interval from the transmission and reception point has wirelessly received the packet. The method comprises determining beamforming weights such that interference caused by transmission from the transmission and reception point of the network node in a downlink direction being reversed to the uplink direction is less than a threshold interference value. The method comprises initiating transmission in at least one beam using the determined beamforming weights. The beamforming weights are used for the transmission at least within the predefined time interval.

Abstract: A radio frequency module includes: a module board that includes a first principal surface and a second principal surface on opposite sides of the module board; a first power amplifier configured to amplify a transmission signal in a first frequency band; a second power amplifier configured to amplify a transmission signal in a second frequency band different from the first frequency band; and a switch having a first pole connected to an input terminal of the first power amplifier and a second pole connected to an input terminal of the second power amplifier. The first power amplifier and the second power amplifier are disposed on the first principal surface, and the switch is disposed on the second principal surface.

Abstract: A radio-frequency module includes an integrated circuit (IC) device and an external inductor provided outside the IC device. The IC device includes a plurality of low-noise amplifiers, one or more inductors, and a switching circuit. The plurality of low-noise amplifiers includes a plurality of transistors in one to one correspondence. The one or more inductors are coupled to one or more of the plurality of transistors. Each inductor is coupled to the emitter or source of a corresponding one of the plurality of transistors. The switching circuit is coupled between the emitter or source of each of the plurality of transistors and the external inductor. The external inductor is coupled between the switching circuit and ground in series with each of the one or more inductors via the switching circuit.

Abstract: A transceiver includes a radio-frequency (RF) front-end circuit, a dedicated RF front-end circuit, and a switchable matching circuit. The RF front-end circuit deals with communications of at least a first wireless communication standard. The dedicated RF front-end circuit deals with communications of a second wireless communication standard only. The switchable matching circuit is coupled to the RF front-end circuit, the dedicated RF front-end circuit, and a signal port of a chip. The switchable matching circuit provides impedance matching between the signal port and the RF front-end circuit when the RF front-end circuit is in operation, and provides impedance matching between the signal port and the dedicated RF front-end circuit when the dedicated RF front-end circuit is in operation. The RF front-end circuit, the dedicated RF front-end circuit, and the switchable matching circuit are integrated in the chip.

Abstract: Systems and methods for controlling power amplifier (PA) performance metrics such as linearity and stability based on out-of-band feedback are presented. Various embodiments provide for synthesizing negative baseband termination using a feedback network between the drain and gate bias paths of the PA, so that the intermodulation distortion (IMD) is suppressed without an increase in system complexity. Other embodiments include a feedback network topology between the drain and gate bias paths of the PA that provides stability enhancement of the PA without the need for conventional stability networks in the radio frequency (RF) path. The out-of-band feedback nature of the approach means that the continuous wave (CW) RF performance is not perturbed, enabling conventional design techniques to be used for the input and output matching networks while enhancing aspects of the PA performance.

Abstract: A transmission device identification system includes: one or more reception units; a feature output unit that outputs, for each of the one or more reception units, a feature of a reception signal of the reception unit, the feature being corrected based on a receiver characteristic of the reception unit; and an identification unit that identifies a transmission device that is a radio wave transmitting source based on the feature and a transmission radio wave feature, the transmission radio wave feature indicating a feature of a transmission radio wave for each transmission device.

Abstract: A radio frequency (RF) module includes a board including a first principal surface and a second principal surface on opposite sides of the board, a filter including a first terminal and a second terminal, a first circuit, and a second circuit. The filter is disposed on the first principal surface. The first circuit is disposed on the second principal surface. In a plan view of the board, a first footprint of a first line and a second footprint of a second line at least partially overlap in the board. The first line connects the first terminal and the first circuit, and the second line connects the second terminal and the second circuit.

Abstract: Systems, methods, and circuitries are provided for extending the range of an analog-to-digital converter (ADC) associated with interference cancellation. In one example a transceiver includes front end circuitry configured to transmit a radio frequency (RF) transmit signal that includes an intended signal and an interference signal. The transceiver includes self-interference cancellation (SIC) circuitry configured to control the front end circuitry based at least on a digital baseband reference transmit signal that comprises a digital representation of the intended signal.

Abstract: Embodiments disclosed herein relate to reducing insertion loss in a transceiver while improving an operating efficiency of the transceiver. To do so, the transceiver may include isolation circuitry with harmonic distortion rejection circuitry, an electrostatic discharge filter, an out-of-band noise filter, and/or a matching network. In particular, the harmonic distortion rejection circuitry may enable a second harmonic signal to pass from a power amplifier of a transmitter of the transceiver to ground. The electrostatic discharge filter may also provide a path to ground for electrostatic discharge, and the out-of-band noise filter may provide a path to ground for noise signals. The isolation circuitry may substantially remove or decrease interference caused by undesirable signals while reducing a power consumption and thus improving an operating efficiency of the transceiver.

Abstract: A network node obtains, via a transmission and reception point (TRP) and from a terminal device not served by the network node, a packet comprising channel state information feedback indicating that a further packet is expected to be transmitted from the TRP on a downlink within a predefined time interval. The network node initiates transmission via the downlink of the TRP responsive to the channel state information feedback such that the transmission interferes with an uplink of the terminal device by less than a threshold amount during the predefined time interval.

Abstract: A radio frequency module includes: a module board including a first principal surface and a second principal surface; a first power amplifier; a second power amplifier; a first output transformer connected to the first power amplifier; and a second output transformer connected to the second power amplifier. The first power amplifier and the second power amplifier are disposed on the first principal surface. The first output transformer and the second output transformer are disposed inside the module board or on the second principal surface.

Abstract: In an embodiment, an apparatus included in a communications system 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 the calibration signal, and wherein the calibration signal comprises an orthogonal code based signal; and a receive section configured to receive the RF calibration signal over-the-air, wherein the receive section includes a second RF section and a calibration section, wherein the second RF section is configured to generate a received calibration signal based on the RF calibration signal, and wherein 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: Near field connection for secure tractor trailer communication, and associated systems and methods are disclosed herein. In one embodiment, a system for wireless communication between a tractor and a trailer includes a first transceiver (TRX) attached to the tractor, and a second TRX attached to the trailer. An engagement between the tractor and the trailer brings the first TRX within an operational distance to the second TRX.

Abstract: A mobile device, such as a mobile phone, including a housing and active cooling cells is described. The active cooling cells are in the housing. The cooling cells utilize vibrational motion to drive a fluid such that the mobile phone has a coefficient of thermal spreading (CTS) greater than 0.5 for a steady-state power generated by the mobile phone of at least five watts.

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: A communication circuit including a first coupler, a transmission-data change detector configured to detect a change in transmission data input to a transmitter, and a received-data change detector configured to detect a change in received data output from a receiver. In a standby state in which the received-data change detector and the transmission-data change detector do not detect changes in the received data and the transmission data, an input side of the receiver is connected to the first coupler and an output side of the receiver is disconnected from the first port in a receiving path; and an input side of the transmitter is connected to the first port and an output side of the transmitter is disconnected from the first coupler in a transmitting path.

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: A communication device has a controller that selects one of at least two second antennas for concurrent transmission with a first antenna. The controller monitors concurrent communication activity of a first and a second transmitter. Based on the concurrent communication activity, the controller identifies respective transmit power limits associated with intermodulation distortion (IMD) for the first antenna transmitting at the first transmit frequency and one of the at least two second antennas transmitting at the second transmit frequency. The controller identifies available total radiated power (TRP), respectively, for each of the at least two second antennas and connects the second transmitter to one of the at least two second antennas having the highest available TRP to optimize communication performance.

Abstract: Disclosed is an electronic device including an antenna module comprising a plurality of radio frequency (RF) chains, and a processor configured to control the antenna module, wherein each of the RF chains comprises an amplifier that amplifies power and a power detector, and wherein the antenna module further comprises a switching circuit that selectively switches between a first path and a second path, the first path being a connection through which an RF signal converted in the antenna module is transmitted to the power detector causing the RF signal to be detected, and the second path being a connection through which the RF signal is transmitted to the amplifier causing the power detector to detect an RF signal of the amplifier.