Abstract: An uplink multiple input-multiple output (MIMO) transmitter apparatus using transmit diversity uses transmit diversity signals that are modified to create intermediate orthogonal signals. A transceiver circuit in the transmitter apparatus includes a sigma-delta circuit that creates a summed (sigma) signal and a difference (delta) signal from the intermediate orthogonal signals. These new sigma and delta signals are amplified by power amplifiers to a desired output level before having two signals reconstructed from the amplified sigma and amplified delta signals by a second circuit. These reconstructed signals correspond to the two original transmit diversity signals but are at a desired amplified level relative to the two original signals. The reconstructed signals are then transmitted through respective antennas as uplink signals.

Abstract: Systems and methods for automated unmanned aerial vehicle recognition. A multiplicity of receivers captures RF data and transmits the RF data to at least one node device. The at least one node device comprises a signal processing engine, a detection engine, a classification engine, and a direction finding engine. The at least one node device is configured with an artificial intelligence algorithm. The detection engine and classification engine are trained to detect and classify signals from unmanned vehicles and their controllers based on processed data from the signal processing engine. The direction finding engine is operable to provide lines of bearing for detected unmanned vehicles.

Abstract: An adaptive radio frequency module including a switching circuit to switch receipt of a voltage, an assembly including the adaptive RF module, a system comprising a base unit with one or more radio frequency modules, and a method of operation of the system are provide.

Abstract: According to various embodiments, an electronic device includes: a communication processor, a transceiver which is electrically connected to the communication processor, a first power amplifier which is electrically connected to the transceiver; a first antenna which is electrically connected to the first power amplifier; and a first supply adjustor which is electrically connected to the communication processor and the first power amplifier, wherein the communication processor can be set to perform a first determination about whether a first carrier bandwidth part (BP) of a first signal transmitted through the first antenna exceeds a first threshold value, perform a second determination about whether the power of the first signal exceeds a second threshold value, select a first tracking mode as an envelope tracking (ET) mode or an average power tracking (APT) mode on the basis of at least a portion of the first determination and the second determination, and control the first supply adjustor using the selecte

Abstract: Semiconductor chips are made increasingly smaller, thanks to improved design techniques and process scaling. Sometimes the bottleneck is not the chip itself but the package size due to many necessary pins. To help reduce the number of package pins, the chip should use less pins by sharing or reusing pins if possible. Therefore, single-ended RF input/output is used for transceiver, and the same pin is shared between RX and TX. A receiver (RX)-transmitter (TX) impedance co-matching method uses multiple bondwires for transceivers sharing one input/output (I/O) pin between RX and TX. The RX input impedance and TX output impedance are transformed closer to each other or even to the same impedance, which makes it possible to get the best RX and TX performance with just one matching network. The chip area is also saved without using on-chip inductors.

Abstract: A circuit includes a transformer having a primary coil coupled to a first power amplifier (PA) and a second PA, and a secondary coil. The secondary coil supplies a current to an antenna based on a first direction of a first phase of a first amplified constant-envelope signal in the primary coil with respect to a second phase of a second amplified constant-envelope signal in the primary coil. The circuit further includes load impedance coupled between a median point of the primary coil and ground. The load impedance dissipates the current based on a second direction of the first phase of the first amplified constant-envelope signal in the primary coil with respect to the second phase of the second amplified constant-envelope signal in the primary coil, which results in improved power efficiency.

Abstract: Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a mobile device includes a first antenna, a first front end system that receives an RF receive signal from the first antenna, a first transceiver coupled to the first front end system, a second antenna, a second front end system that provides an RF transmit signal to the second antenna, and a second transceiver coupled to the second front end system. The second front end system observes the RF transmit signal to generate an RF observation signal, which is downconverted and processed by the second transceiver to generate digital observation data that is provided to the first transceiver. The first transceiver downconverts the RF receive signal to baseband, and compensates the baseband receive signal for an amount of RF signal leakage indicated by the digital observation data.

Abstract: An amplifier includes: a first transistor chip including a plurality of cells and provided beside an input matching substrate; a second transistor chip including a plurality of cells and provided beside the input matching substrate; a plurality of first bonding wires connecting the input matching substrate and the first transistor chip; and a plurality of second bonding wires connecting the input matching substrate and the second transistor chip, and variance of the mutual inductance of the first bonding wires and the second bonding wires is compensated by adjusting the self-inductance of the first bonding wires and the second bonding wires.

Abstract: Techniques maintaining receiver reliability, including determining a present attenuation level for an attenuator, wherein the attenuation level is set by a gain controller, determining a relative reliability threshold based on the present attenuation level, receiving a radio frequency (RF) signal, determining a voltage level of the received RF signal, comparing the voltage level of the received RF signal to the relative reliability threshold to determine that a reliability condition exists, and overriding, in response to the determination that the reliability condition exists, the present attenuation level set by the gain controller with an override attenuation level based on the present attenuation level.

Abstract: An electronic device according to an embodiment of the disclosure includes a housing that includes a first plate, a second plate facing away from the first plate, and a side member surrounding a space between the first plate and the second plate and including a first conductive region and a second conductive region electrically separated from the first conductive region, a wireless communication circuitry that is disposed within the space, transmits/receives a first signal in a first frequency band ranging from 1.4 GHz to 6 GHz by using the first conductive region, and transmits/receives a second signal in a second frequency band ranging from 0.6 GHz to 1.4 GHz by using the second conductive region, and a GNSS receiver circuitry that is disposed within the space, receives a third signal in a third frequency band ranging from 1559 MHz to 1610 MHz by using the first conductive region, and receives a fourth signal in a fourth frequency band ranging from 1164 MHz to 1189 MHz by using the second conductive region.

Abstract: A portable electronic device such as a handheld electronic device is provided. The device may have upper and lower portions. The upper portion may have clips that attach to springs on the lower portion. The device may have a housing with a bezel. A prong on the springs may ground the bezel. A vibrator mounting bracket may hold a vibrator in place within the housing. The vibrator mounting bracket may have an end that engages the housing. A threaded insert may be welded to the spring. A screw that passes through a hole in the vibrator mounting bracket may be screwed into the threaded insert to attach the vibrator to the housing. An elastomeric member may bias the vibrator towards the bracket. An acoustic module may serve as a subassembly for the device. Components such as an antenna, dock connector, microphone, and speaker may be attached to the acoustic module.

Abstract: Base station antennas include a first array of radiating elements that is coupled to a first RF port through a first feed network, a second array of radiating elements that is coupled to a second RF port through a second feed network, and first and second circuit elements. The first circuit element has a first port coupled to the first feed network, a second port coupled to a first port of the second circuit element and a third port coupled to a first radiating element of the first array of radiating elements. The second circuit element has a second port coupled to a first radiating element of the second array of radiating elements and a third port coupled to the second feed network.

Abstract: Dynamic automatic gain controller configuration in multiple input and multiple output receivers is provided by monitoring a given section of wireless spectrum for higher-priority signals using a first antenna set associated with a first Automatic Gain Controller (AGC) set while concurrently monitoring the given section of wireless spectrum for wireless packet-based traffic using a second antenna set associated with a second AGC set; in response to detecting a packet via the second antenna set: re-associating the first antenna set and the second antenna set to a third AGC set; receiving the packet via the first antenna set and the second antenna set using the third AGC set; and in response to the packet being received, re-associating the first antenna set to the first AGC set and the second antenna set to the second AGC set.

Abstract: Methods and devices to improve the insertion loss at the LNA input of RF receivers are disclosed. The described methods and devices make use of the band switches in OFF state to improve the layout design, insertion loss and NF. Exemplary embodiments incorporating the disclosed concept are also presented.

Abstract: An antenna is provided for a personal computing device, for example a wearable device such as a smartwatch. The antenna includes one or more radiating elements configured to receive or transmit radio waves. For example, the one or more radiating elements may at least partially be formed by one or more components of a display of a device, where the one or more components of the display include one or more conductive elements. The one or more radiating elements may also at least partially be formed by a dedicated antenna layer positioned in the display of the device.

Abstract: Embodiments disclosed herein relate to isolating a receiver circuit of an electronic device from a transmission signal and leakage of the transmission signal. To do so, an isolation circuit is disposed between the receiver circuit and a transmission circuit. The isolation circuit may include multiple variable impedance devices and one or more antennas. The impedances of the variable impedance devices may be balanced such that a signal at a particular frequency or within a particular frequency band can pass through or is blocked by the isolation circuit. The isolation circuit may include one or more double balanced duplexers to achieve the improved isolation. The isolation circuit may also increase bandwidth available for wireless communications of the electronic device.

Abstract: A radio frequency circuit can transfer radio frequency signals used in first and second communication systems, and includes: a first transfer circuit that transfers a radio frequency signal having a frequency range in a first communication band having first transmission and receiving bands; and a second transfer circuit that transfers a radio frequency signal having a frequency range in a second communication band having second transmission and receiving bands. The radio frequency circuit can simultaneously transmit transmission signals having frequency ranges in the first and second communication bands using the first and second transfer circuits. The first receiving band is lower than the first transmission band, the first transmission band is lower than the second transmission band, and the second transmission band is lower than the second receiving band. The first and second transfer circuits are mounted on different mounting boards.

Abstract: Radio frequency communication systems with a combined antenna impedance tuning and antenna multiplexing functionality are provided. In certain embodiments, a packaged radio frequency module includes an antenna multiplexer and an antenna impedance tuner. The module can be configured to provide impedance matching between one or more radio frequency front end modules and an antenna. The antenna impedance tuner can supplement antenna tuning provided by an antenna aperture separately connected to the antenna.

Abstract: This disclosure relates to variable-gain amplifiers that include degeneration circuits configured to adapt to a gain mode that is currently being implemented. For example, a variable-gain amplifier can operate in a plurality of gain modes to amplify a signal with different levels of amplification. The variable-gain amplifier can include a gain circuit configured to amplify a signal and a degeneration circuit coupled to the gain circuit. The degeneration circuit can include an inductor and a switching-capacitive arm coupled in parallel to the inductor. The degeneration circuit can operate based on a current gain mode to change an inductance for the variable-gain amplifier.

Abstract: A wireless communication module includes a wireless module board, a frequency converter, an amplifier phase shifter, a band-pass filter, and a communication board, and a through-hole, which penetrates in a direction in which the wireless module board and the communication board are aligned, is formed at a portion of the communication board to which at least one of IC chips of the frequency converter and the amplifier phase shifter faces, and the band-pass filter is covered by the communication board.