Abstract: In some examples, a system includes a transceiver configured to transmit a first surveillance message at a first power level at or below a first maximum power level. The system also includes processing circuitry coupled to the transceiver, the processing circuitry configured to determine that a threshold condition exists. The processing circuitry is also configured to determine a second maximum power level in response to determining that the threshold condition exists, where the second maximum power level is lower than the first maximum power level. The transceiver is configured to transmit, in response to the processing circuitry determining that the threshold condition exists, a second surveillance message at a second power level, wherein the second power level is at or below the second maximum power level.

Abstract: The present disclosure relates to signal sending circuits, signal receiving circuits, electronic apparatus, and base stations. One example circuit includes a signal pre-processing sub-circuit, a digital-to-analog conversion sub-circuit, an intermediate frequency power splitter, K frequency conversion phase-shift sub-circuits, and K antenna elements. An output end of the signal pre-processing sub-circuit is connected to an input end of the digital-to-analog conversion sub-circuit, an output end of the digital-to-analog conversion sub-circuit is connected to an input end of the intermediate frequency power splitter, an output end of the intermediate frequency power splitter is connected to input ends of the K frequency conversion phase-shift sub-circuits, and output ends of the K frequency conversion phase-shift sub-circuits are connected one-to-one to input ends of the K antenna elements.

Abstract: Radio base station, having a first radio module for radio communication with first radio communication devices, and a connection for connecting an ESL radio module for radio communication with electronic display panels, wherein the radio base station has a first, in particular software-based, control stage for controlling the radio communication of the first radio module according to a first communication protocol, and a second, in particular software-based, control stage for controlling the radio communication of the ESL radio module connectable to the connection according to a second communication protocol, and a, in particular software-based, third control stage for predictively changing a time sequence, defined for a future period, of radio activities of the first radio module on the basis of radio activities of the ESL radio module that are defined for said future period.

Abstract: An apparatus is disclosed, comprising means for providing two or more amplifiers for amplifying signals in two or more respective frequency bands, receiving a composite signal comprising first and second predistorted input signals in first and second frequency bands and filtering the composite signal to provide (i) the first predistorted signal for input to a first amplifier of the two or more amplifiers for producing an amplified first output signal and (ii) the second predistorted signal for input to a second amplifier of the two or more amplifiers for producing an amplified second output signal. The apparatus may also comprise means for routing, at non-overlapping times, the first and second output signals to a common feedback path and for linearizing received first and second input signals based on the respective first and second output signals received on the common feedback path.

Abstract: A radio communication device includes: a plurality of antenna elements; a phase shifter that applies weights for each of the antenna elements respectively to first-band data and second-band data of different frequency bands to form beams corresponding to the first-band data and the second-band data; a power amplifier that is arranged for each of the antenna elements; and a processor configured to compensate for non-linear distortion.

Abstract: A transmitter comprises an antenna array demultiplexor having a first input for an output signal, a second input for a control signal, a first output coupled to a first output pin, and a second output coupled to a second output pin. The antenna array demultiplexor provides the output signal to the first or second output based on the control signal. The first and second output pins are coupled to first and second antennae, respectively. In some implementations, the transmitter includes a transformer and a capacitor coupled in parallel between the first and second output pins, and the antenna array demultiplexor comprises a first switch coupled between the first output pin and a first ground pin, and a second switch coupled between the second output pin and a second ground pin. The first switch receives a second control signal, and the second switch receives an inverse of the second control signal.

Abstract: Disclosed herein are signal amplifiers that include a plurality of switchable amplifier architectures so that particular gain modes can use dedicated amplifier architectures to provide desired characteristics for those gain modes, such as low noise figure or high linearity. The disclosed signal amplifier architectures provide tailored impedances using a degeneration block or matrix without using switches in the degeneration switching block. The disclosed signal amplifier architectures provide a plurality of gain modes where different gain modes use different paths through the amplifier architecture. Switches that are used to select the path through the amplifier architecture also provide targeted impedances in a degeneration block or matrix. The switches that select the gain path are provided in the amplifier architecture and are thus not needed or used in the degeneration block, thereby reducing the size of the package for the amplifier architecture.

Abstract: Due to its geometry, spherical reflector antenna is inherently diffractive, leading to spherical aberration. Disclosed are example embodiments of methods and systems to minimize or eliminate spherical aberration in a spherical reflector antenna system. One of the systems includes: a main spherical reflecting dish; and a spherical feed having a plurality of antenna elements disposed on a spherical surface. The plurality of antenna elements can be disposed on a convex surface of the spherical surface of the spherical feed facing the main spherical reflecting dish.

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.

Abstract: An electronic device for identifying a status of a wireless communication device of various embodiments of the present disclosure can include an antenna configured to receive wireless signals outputted from a first antenna and a second antenna included in an external electronic device, a communication circuit electrically connected to the antenna, and a control circuit. The control circuit can be configured to control the external electronic device wherein the external electronic device outputs specified wireless signals at a first specified phase by using the first antenna and at a second specified phase by using the second antenna, receive the specified wireless signals by using the antenna, identify a signal intensity corresponding to the specified wireless signals by using the communication circuit, and determine a status related to the external electronic device at least on the basis of a difference value between the specified signal intensity and a reference signal intensity.

Abstract: Aspects of the subject disclosure may include, for example, a device that has a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, including receiving a request for an observation of an overhead viewing area from an observer location; discovering an interference of a satellite with the observation of the overhead viewing area; determining possible solutions to the interference; selecting a solution of the possible solutions; receiving the observation from one or more satellites responding to the solution selected; and providing a response to the request including the observation received. Other embodiments are disclosed.

Abstract: A wireless communication system with scalable diversity and multi-transceiver diversity deployment is disclosed. An example communication system includes a first wireless transceiver, having a first bandwidth and a first center frequency, a second transceiver, having a second bandwidth and a second center frequency, and a processor. The processor is configured to operate the wireless communication system in a first mode when a difference between the first center frequency and the second center frequency is greater than or equal to half of the first bandwidth plus the second bandwidth. The processor is also configured to operate the wireless communication system in a second mode when a difference between the first center frequency and the second center frequency is less than half of the first bandwidth plus the second bandwidth.

Abstract: Described are concepts, systems and techniques for detecting whether an antenna is connected to a transmit system to thereby protect a power amplifier lineup from damage.

Abstract: A circuit portion for a radio transceiver comprises: a power amplifier for use when the transceiver operates in a transmission mode, a low-noise amplifier for use when the transceiver operates in a reception mode, a voltage control circuit portion, and a transformer. The transformer comprises a primary winding with a terminal for connecting to an antenna, and a secondary winding comprising a first terminal, a second terminal and a third terminal located between the first and second terminals. The power amplifier is connected to the secondary winding, the low-noise amplifier is connected to both the primary and secondary windings and the voltage control circuit portion is connected to the third terminal of the secondary winding. The voltage control circuit portion applies a first voltage to the third terminal when the transceiver operates in the transmission mode and applies a second, different voltage when the transceiver operates in the reception mode.

Abstract: A transceiver interface circuit, comprising a driver amplifier (DA), a load line impedance modulation circuit coupled to the DA; and multiple selectable output ports coupled to the load line impedance modulation circuit, an impedance presented by the load line impedance modulation circuit being adjustable dependent on at least a number of output ports coupled to the load line impedance modulation circuit.

Abstract: A transformer-based amplifier, an operating method thereof, and devices including the same are disclosed. A millimeter wave amplifier includes a first transformer positioned on an input side of the millimeter wave amplifier, a second transformer positioned on an output side of the millimeter wave amplifier, and one or more of amplification stages positioned between the first transformer and the second transformer.

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: The disclosed technology includes device, systems, techniques, and methods for amplifying a complex modulated signal with a broadband power amplifier. A broadband power amplifier may include an input network connected a long an input signal path, a driver stage, an interstage matching network stage, a power amplification stage, and a broadband matching output network. The broadband matching output network may include two coupled transmission lines and a compensation line connected between the two coupled transmission lines. Further, the broadband matching output network may include a capacitor connected with a secondary winding and a capacitor connected to each of the primary windings. The disclosed technology further includes transmission systems incorporating the broadband power amplifier.

Abstract: Apparatus and methods provide predistortion for a phased array. Radio frequency (RF) sample signals from phased array elements are provided along return paths and are combined by a hardware RF combiner. Phase shifters are adjusted such that the RF sample signals are phase-aligned when combined. Adaptive adjustment of predistortion for the amplifiers of the phased array can be based on a signal derived from the combined RF sample signals.

Abstract: A high-frequency module and a communication device capable of suppressing deterioration of a noise figure of a low-noise amplifier are provided. A high-frequency module (1) includes a mounting substrate (2), a low-noise amplifier (12), an input switch (20), and a matching circuit (30). The input switch (20) is connected to an input terminal of the low-noise amplifier (12). The matching circuit (30) performs impedance matching between the input switch (20) and the low-noise amplifier (12). The matching circuit (30) is disposed on a first main surface (21) in a first direction (Dl) of the mounting substrate (2). The input switch (20) and the low-noise amplifier (12) are disposed on a second main surface (22) opposed to the first main surface (21). When the mounting substrate (2) is viewed in plan, the input switch (20) overlaps at least a part of the matching circuit (30).