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.

Methods and devices used in mobile receiver front end to support multiple paths and multiple frequency bands are described. The presented devices and methods provide benefits of scalability, frequency band agility, as well as size reduction by using one low noise amplifier per simultaneous outputs. Based on the disclosed teachings, variable gain amplification of multiband signals is also presented.

Methods and devices used in mobile receiver front end to support multiple paths and multiple frequency bands are described. The presented devices and methods provide benefits of scalability, frequency band agility, as well as size reduction by using one low noise amplifier per simultaneous outputs. Based on the disclosed teachings, variable gain amplification of multiband signals is also presented.

Various embodiments disclose a method and a device including: an antenna, a switching regulator, communication chip including an amplifier and a linear regulator operably connected to the amplifier and the switching regulator, the communication chip configured to transmit a radio-frequency signal from the electronic device through the antenna, and control circuitry configured to control the communication chip such that the linear regulator provides the amplifier with a voltage corresponding to an envelope of an input signal input to the amplifier, the input signal corresponding to the radio-frequency signal.

An amplifier and corresponding method include a field-effect transistor (FET) amplifier and a cascode FET. Each FET may operate with a positive ratio between its third-order nonlinearity coefficient and its linear gain. An inductor added at a gate of the cascode FET, operatively coupled with other components in a circuit, results in a first equivalent impedance looking into an input of the cascode FET. The first equivalent impedance may substantially offset a distortion output of the FET amplifier based upon the added inductor. The inductor operatively coupled with the circuit may result in a second equivalent impedance looking out of the gate of the cascode FET. The second equivalent impedance may substantially offset a distortion output of the cascode FET based upon the added inductor. In addition, a programmable capacitor connected between the gate and drain of the cascode FET may further substantially offset a distortion output of each FET.

Power amplifier assemblies and components are disclosed. According to some embodiments, a power amplifier assembly (10) is provided that includes a power amplifier (12) having a gate lead (14) with a gate contact surface, a drain lead (13) with a drain contact surface and a source contact surface (15) having a length and width. An extended heat slug (11) is mounted against the source contact surface to conduct heat away (18) from the surface and to extend the electrical path of the source. The extended heat slug has at least a length that is greater than the length of the source contact surface.

Power amplifier assemblies and components are disclosed. According to some embodiments, a power amplifier assembly (10) is provided that includes a power amplifier (12) having a gate lead (14) with a gate contact surface, a drain lead (13) with a drain contact surface and a source contact surface (15) having a length and width. An extended heat slug (11) is mounted against the source contact surface to conduct heat away (18) from the surface and to extend the electrical path of the source. The extended heat slug has at least a length that is greater than the length of the source contact surface.

Apparatus and methods for power amplifier distortion networks are disclosed. In one aspect, there is provided a power amplifier system including a power amplifier configured to amplify a radio frequency input signal. The power amplifier including an input configured to receive the radio frequency input signal and an output configured to generate an amplified radio frequency signal. The power amplifier system further includes a distortion network electrically coupled to either the input or the output of the power amplifier. The distortion network including a plurality of channelized resistors. The channelized resistors connected in series to either an input or an output of the power amplifier.

Apparatus and methods for power amplifier distortion networks are disclosed. In one aspect, there is provided a power amplifier system including a power amplifier configured to amplify a radio frequency input signal. The power amplifier including an input configured to receive the radio frequency input signal and an output configured to generate an amplified radio frequency signal. The power amplifier system further includes a distortion network electrically coupled to either the input or the output of the power amplifier. The distortion network including a plurality of channelized resistors. The channelized resistors connected in series to either an input or an output of the power amplifier.

A power amplification device, including a first amplification branch, a second amplification branch, a harmonic injection circuit, and a first output matching circuit. A first amplifier in the first amplification branch supports a first frequency. A second amplifier in the second amplification branch supports the first frequency and a second frequency, and the second amplifier is turned off for a signal of the first frequency that has a power value lower than an enabling threshold. The harmonic injection circuit injects a signal of the second frequency that is input from a second input terminal (I2) to a signal of the first frequency that is input from a first input terminal (I1) to obtain a signal of the first frequency that has undergone harmonic injection.