A transmitting and receiving device having a module (GSZ) with a configurable HF high-power amplifier (HPA) that includes a main power amplifier (DM) with a main amplifier core and at least one peak power amplifier (DP1) having an auxiliary amplifier core. A switching element connected to inputs of the main power amplifier and the at least one peak power amplifier is connected to a digital input signal divider (ET) having a plurality of outputs and an output combiner (C) is connected to outputs of the amplifier cores for the main power amplifier and the at least one peak power amplifier. A multi-harmonic transformation line (LAH) is connected at the amplifier core output of the main power amplifier and at the amplifier core output of the at least one peak power amplifier, and a circulator (Z1) is connected to the output of the output combiner or an impedance converter (AN1).

Examples disclosed herein relate to a high gain active relay antenna system. The active relay antenna system comprises a first antenna pair having a first receive antenna and a first transmit antenna to communicate wireless signals in a forward link from a base station to a plurality of users; and a second antenna pair having a second receive antenna and a second transmit antenna to communicate wireless signals in a return link from the plurality of users to the base station. The active relay antenna system further comprises a first active relay section and a second active relay section to provide for adjustable power gain in the wireless signals.

Power amplifiers for amplifying a radio frequency signal are provided. The power amplifier may include an envelope tracking power supply, a carrier amplifier coupled with the envelope tracking power supply and configured to amplify the radio frequency signal, an input matching network configured to split the amplified radio frequency signal from the carrier amplifier such that one part of the amplified radio frequency signal passes along a peak amplifier path and another part of the amplified radio frequency signal passes along an impedance transformer path, a peak amplifier coupled with the envelope tracking power supply and configured to amplify the one part of the amplified radio frequency signal from the input matching network, an impedance transformer configured to perform impedance transformation on the other part of the amplified radio frequency signal from the input matching network, an output matching network configured to combine the output of the peak amplifier and the impedance transformer, wherein the peak amplifier is configured to be switched off in a lower power mode and switched on in a high power mode based at least in part on an input power level of the radio frequency signal. With the claimed solutions, more powerful and efficient power amplifiers that are capable of operating over broader frequency ranges may be achieved.

An electronic device is provided. The electronic device may include a plurality of antennas configured to transmit and receive a signal in a radio frequency (RF) frequency band; and an RF circuit configured to process the signal in the RF frequency band. The RF circuit includes a reception (Rx) path configured to transfer a first signal received through the plurality of antennas, a transmission (Tx) path configured to transfer a second signal to the plurality of antennas, and a coupler configured to transfer at least a part of the second signal obtained in the Tx path to the Rx path. The Tx path includes a power divider configured to distribute power to at least one antenna among the plurality of antennas, and the coupler is electrically connected to an input terminal of the power divider to be disposed before the power divider.

A radio frequency (RF) power amplifier includes an amplifying stage that includes an amplifying module, an input module and a feedback module. The amplifying module receives an RF to-be-amplified signal, and performs power amplification on the RF to-be-amplified signal to generate an RF output signal. The input module receives an RF input signal. The feedback module receives the RF output signal, cooperates with the input module to provide the RF to-be-amplified signal based on the RF input and output signals, and cooperates with the amplifying module to forma positive feedback loop that provides a loop gain which is less than one.

A low noise amplifying system with adjustable gain. The low noise amplifier includes a plurality of gain stages, including a first stage and a last stage each having fixed gain, and an intermediate stage having adjustable gain. The intermediate stage is an inverting gain stage that includes a field effect transistor connected from the output to the input, to provide negative feedback, reducing the gain as a control voltage (applied to the gate of the field effect transistor) is adjusted to decrease the channel resistance of the field effect transistor. A control circuit measures the input and output signal power of the amplifying system and adjusts the gain of one or more intermediate stages to trade off linearity against noise figure.

The invention relates to a radio frequency assembly comprising a radio frequency circuit comprising at least one group of N≥2 amplifiers (A1, A2) disposed in series on a substrate (1), said assembly comprising a package (2) wherein the substrate (1) is disposed, each amplifier comprising a local grounding point (b1, b2, b3) and a local feed point (a1, a2, a3), said common grounding points being connected to a common ground (GND) outside the package (2), said common feed points being connected to a common power supply (VDD) outside the package, said assembly comprising at least N−1 parallel LC circuits disposed between the common power supply (VDD) and the local feed point (a2, a3) of an amplifier (A2) so as to attenuate the current loops between two amplifiers in series.

A system for a differential trans-impedance amplifier circuit comprising: an amplifier having a pair of input nodes and configured to generate an amplified replica of a differential voltage on said pair of input nodes; a photodiode; a pair of DC-blocking capacitors coupling said photodiode to said pair of input nodes; at least one resistance coupled between said pair of input nodes of said amplifier; and a bias network comprising two identical photodiode biasing resistances each photodiode biasing resistance coupled in series between said photodiode and a respective DC voltage. A feedback loop for the amplifier may include source followers that are operable to level shift voltages prior to coupling capacitors that couple said photodiode to said amplifier to ensure stable bias conditions for said amplifier. The source followers may include CMOS transistors. The amplifier may be integrated in a complementary metal-oxide semiconductor (CMOS) chip, which may include a CMOS photonics chip.

A distributed active transformer includes an input transformer set and an output transformer set. Active stages are coupled between a transformer in the input transformer set and a transformer in the output transformer set. The input and output transformer sets are each configured as a slab transformer. The input slab transformer includes a single primary slab and many secondary slabs. The output slab transformer includes many primary slabs and a single secondary slab.

An attenuation circuit comprising: a connection-node for connecting to an RF connection; an isolation-capacitor connected in series between the connection-node and an internal-node; a first-bias-resistor connected in series between a first-control-node and the internal-node; a second-bias-resistor connected in series between the internal-node and a second-control-node; a first-attenuation-diode connected in series between the first-control-node and the internal-node, wherein the anode of the first-attenuation-diode is closest to the first-control-node; a second-attenuation-diode connected in series between the internal-node and the second-control-node, wherein the anode of the second-attenuation-diode is closest to the internal-node; a first-decoupling-capacitor connected in series between the first-control-node and the reference-node; and a second-decoupling-capacitor connected in series between the second-control-node and the reference-node.