Abstract: Methods and devices addressing design of wideband LNAs with gain modes are disclosed. The disclosed teachings can be used to reconfigure RF receiver front-end to operate in various applications imposing stringent and conflicting requirements. Wideband and narrowband input and output matching with gain modes using a combination of the same hardware and a switching network are also disclosed. The described methods and devices also address carrier aggregation requirements and provide solutions that can be used both in single-mode and split-mode operations.

Abstract: Systems and methods for antenna impedance matching provide an integrated circuit (IC) configured to be placed proximate an antenna that includes a sensor based on a coupler having forward and reverse power detectors for detecting an impedance at the antenna and provides dynamic impedance matching. Further, exemplary aspects of the present disclosure contemplate using a single wire bus capable of supplying power and providing a bidirectional serial communication link to allow communication between the IC of the present disclosure and a control circuit (e.g., a bridge or transceiver). Further aspects of the present disclosure contemplate providing systems and methods for calibrating the IC at production. Further, the accuracy of the impedance sensor may be dependent on accurate determination of power and phase difference between forward and reverse coupled signals, and a system for removing an offset between the forward and reverse power detectors is disclosed.

Abstract: Broadband feedforward power amplifiers are disclosed herein. In certain embodiments, a broadband feedforward power amplifier includes a power amplifier electrically connected between a radio frequency (RF) input and an RF output, and a feedforward compensation circuit including a first amplifier electrically connected in parallel with the power amplifier, a load impedance, and a second amplifier electrically connected between the radio frequency input and the load impedance. The feedforward compensation circuit generates a compensation signal based on sensing an output of the first amplifier and an output of the second amplifier, and provides the compensation signal to the radio frequency output to thereby compensate the power amplifier for non-linearity.

Abstract: A wireless communication device includes: a plurality of power amplifiers provided for a plurality of respective antenna elements, each of the power amplifiers amplifying a signal; a distortion compensation unit that executes distortion compensation of a transmission signal by using an inverse function corresponding to nonlinear distortion generated in the power amplifiers; and a controller that operates by switching a first mode and a second mode, the first mode setting individual inverse functions for the respective power amplifiers in the distortion compensation unit and updating coefficients of the individual inverse functions, the second mode suspending the update of the coefficients of the individual inverse functions and setting, in the distortion compensation unit, an integrated inverse function acquired by performing weighted addition of the individual inverse functions.

Abstract: A broadband power amplifier device includes an input matching network including first, second and third inductors, a driver amplifier, and first, second and third frequency modulators. First inductor has one end connected to output of a mixer and the other end connected to one end of the first frequency modulator, with the other end of the first frequency modulator being grounded. The second inductor has one end connected to one end of first inductor and the other end connected to input of driver amplifier, with second frequency modulator being connected across second inductor. Third inductor has one end connected to output of driver amplifier and the other end connected to input of power amplifier, with third frequency modulator being connected across third inductor. Bandwidth of power amplifier device can be extended and area and current consumption thereof can be reduced, while power can be improved without large LO driver.

Abstract: Radio-frequency front-end circuit includes: first transfer circuit that transfers a 4G signal, a first antenna terminal connected to a first antenna, a second antenna terminal connected to a second antenna, and a switch that includes a first selection terminal and a second selection terminal. The first selection terminal is connected to the first transfer circuit, and the second selection terminal is connected to a second transfer circuit that transfers a 5G signal. The switch: when the first antenna is high in antenna sensitivity, connects the first antenna terminal to the first selection terminal, and connects the second antenna terminal to the second selection terminal; and when the second antenna is high in antenna sensitivity, connects the first antenna terminal to the second selection terminal, and connects the second antenna terminal to the first selection terminal.

Abstract: An antenna device includes: multiple H-bridge circuits each of which including a first switch set and a second switch set connected in parallel with one another; a single connection antenna element connected between a point disposed between the two switching elements of the first switch set included in one H-bridge circuit and a point disposed between the two switching elements of the second switch set included in the one H-bridge circuit; and a multiple connection antenna element connected between a point disposed between the two switching elements of the first switch set included in the one H-bridge circuit and a point disposed between the two switching elements of the second switch set included in a different H-bridge circuit.

Abstract: Power amplifiers with adaptive bias for envelope tracking applications are provided herein. In certain embodiments, an envelope tracking system includes a power amplifier that amplifies a radio frequency (RF) signal and that receives power from a power amplifier supply voltage, and an envelope tracker that controls a voltage level of the power amplifier supply voltage based on an envelope of the RF signal. The power amplifier includes a current mirror having an input that receives a reference current, an output electrically connected to the power amplifier supply voltage, and a node that outputs a gate bias voltage. The power amplifier further includes a field-effect transistor that amplifies the radio frequency signal and a first depletion-mode transistor having a gate connected to the node of the current mirror and a source connected to a gate of the field-effect transistor.

Abstract: In simultaneous communication using multiple frequency bands, the degradation in the communication quality is suppressed. The radio-frequency front-end circuit (1) includes an antenna terminal (2), a transmit filter (3), a receive filter, a transport filter, a switch (6), and a phase adjusting circuit (7). The switch (6) is capable of connecting the antenna terminal (2) to the transmit filter (3) or the receive filter and the transport filter simultaneously. The transmit filter (3) is disposed on a transmission path (T1). The receive filter is disposed on a reception path. The transport filter is disposed on a transport path. The phase adjusting circuit (7) is disposed on at least one of paths, the transmission path (T1), the reception path, and a reception/transmission path.

Abstract: Cascode power amplifier bias circuits suitable for operating across multiple power supply domains are provided. In certain embodiments, a power amplifier system includes a cascode power amplifier and a multi-domain bias circuit that generates at least a first cascode bias voltage for the cascode power amplifier. The multi-domain bias circuit includes a coarse regulator that generates a regulated voltage based on a power supply voltage that is operable with multiple voltage levels associated with different power supply domains, a bandgap reference circuit that is powered by the regulated voltage and outputs a bandgap reference voltage, a bias voltage generator that generates multiple selectable bias voltages based on the bandgap reference voltage, and a bias voltage selector that chooses the first cascode bias voltage from amongst the selectable bias voltages.

Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode.

Abstract: Provided are a supply modulator and a wireless communication apparatus including the same. A supply modulator according to the inventive concept is driven in any one of an average power tracking mode and a discrete level envelope tracking mode to apply an output voltage to a power amplifier, and includes a multiple output voltage balancer, a switching regulator, a switching regulator controller, a switch array, a discrete-level controller, a switch controller, an output filter, and a main controller.

Abstract: According to an embodiment, an electronic device may include a first Printed Circuit Board (PCB). The first PCB may include a wireless communication circuit, a first connector which includes a first terminal and a second terminal, a first conductive path which couples the wireless communication circuit and the first terminal, a second conductive path which couples a first ground and the second terminal, a third conductive path which couples a Direct Current (DC) power source and the first conductive path, and at least one resistor and at least one first inductor coupled with the third conductive path. The electronic device may further include a second PCB electrically coupled with to at least one antenna.

Abstract: An apparatus includes a power management circuit to receive an input voltage and to generate and provide a first output voltage to an energy storage device. The power management circuit further generates and provides a second output voltage to a load. The first output voltage is greater than the input voltage, and the second output voltage is smaller than the first output voltage. The apparatus further includes a monitor circuit to monitor the first output voltage and to provide a signal to the load to indicate when the load may perform an operation.

Abstract: In an embodiment method, a hybrid coupler comprises a first input receiving an analog signal, a second input receiving an additional analog signal phase shifted by 90° from the analog signal, and first and second outputs. The method comprises injecting into the second output a test signal having an initial test phase, iteratively generating a current test phase for the test signal, from the initial test phase to a final test phase equal to the initial test phase increased by at least one portion of one complete revolution, and, in each iteration, measuring the current peak value of the first output, and storing the current test phase and the current peak value as a maximum/minimum peak value if there is not a stored maximum/minimum peak value higher/lower than the current peak value, respectively, and determining a phase of the analog signal from the stored test phase.

Abstract: A system for power amplifier control includes a processor, a memory in communication with the processor, wherein the processor and the memory are configured to simultaneously provide input signal strength of each of a plurality of power amplifiers in a millimeter wave (mmW) phased array system, determine an average input signal strength of the plurality of power amplifiers based on the provided input signal strengths using an analog-to-digital converter (ADC), determine a voltage headroom for the plurality of power amplifiers based on the determined average input signal strength, estimate a power backoff value based on the voltage headroom, and determine a gain control value based on the estimated power backoff value.

Abstract: Disclosed is a radio frequency circuit, a method of transmitting and receiving radio frequency signals, and a wireless communication device.

Abstract: According to some embodiments, a portable electronic device is described. The portable electronic device includes a housing member defining an external sidewall, a first glass cover and a second glass cover, where the second glass cover includes a first region having a first exterior surface, a second region having a second exterior surface vertically displaced from the first exterior surface, where the second region includes a first opening, a second opening, and a third opening, and a transition region having an exterior surface that extends between the first exterior surface to the second exterior surface. The portable electronic device further includes a first camera module disposed within the first opening, a second camera module disposed within the second opening, a strobe module disposed within the third opening, and a trim structure having an edge that overlays the second region of the second glass cover.

Abstract: The present invention relates to an electronic device and, more particularly, to an electronic device and a method for transmitting and receiving signals.

Abstract: An antenna module includes a dielectric substrate and a radiation element disposed on the dielectric substrate. The dielectric substrate includes a flat portion (131) and a flat portion (130) having mutually different normal directions, and a bent portion connecting the flat portion (131) and the flat portion (130) to each other. The flat portion (131) has a protruding portion partially protruding in a direction toward the flat portion (130) along the flat portion (131) from a boundary portion between the bent portion and the flat portion (131). The flat portion (131) and the bent portion are connected to each other at a position where the protruding portion is not provided in the flat portion (131). At least a part of the radiation element is disposed on the protruding portion.