This letter reports a novel methodology for co-design of broadband power amplifiers (PAs) and hightunable filters. It is for the first time demonstrated that the tunable filter’s input port can be synthesized to directly match the transistor’s output, thus eliminating the conventional broadband/band-reconfigurable matching network of the PA. This leads to minimized circuit size, volume, and los...

In this article, we present a novel decomposed vector rotation (DVR)-based recurrent neural network behavioral model for digital predistortion (DPD) of radio frequency (RF) power amplifiers (PAs) in wideband scenarios. By representing memory terms DVR with states and redesigning the piecewise modeling, propose scheme. To ensure stable operation enhanced modeling accuracy, integrate into gated l...

Simultaneous wireless information and power transfer (SWIPT) is a promising technology to achieve wide-area energy by sharing the same radio frequency (RF) signal infrastructure of legacy communication systems. To enlarge effective range in practice, it desirable have hybrid signaling SWIPT scheme, which combines high-power multitone with low-power broadband signal. This paper presents systemat...

The class-D power amplifiers which operate in a switched mode have become an attractive alternative of the conventional analog power amplifiers class-A, B and AB in the field of audio applications. They offer high power efficiency compared to analog power amplifiers and can be realised as completely digital power amplifiers. This paper briefly overviews the basic concepts of analog and digital ...

Gallium Nitride (GaN) amplifiers have demonstrated very high power density as well as wide band width in previous research. This paper examines their use in supplying flat gain, power, and linearity across a large band width. It demonstrates two types of power amplifiers: a Ft Doubler (FT2) amplifier and a Cascode amplifier, both of which require a simple PCB tune. Both amplifiers show 0.2 to 4...

The Doherty Power Amplifier (DPA) was invented in the far 1936 by W. H. Doherty, at the Bell Telephone Laboratories of Whippany, New Jersey (Doherty, 1936). It was the results of research activities devoted to find a solution to increase the efficiency of the first broadcasting transmitters, based on vacuum tubes. The latter, as it happens in current transistors, deliver maximum efficiency when...

Large array systems use a massive number of antenna elements and clever precoder designs to achieve an gain at the user location. These precoders require linear front-ends, more specifically power amplifiers (PAs), avoid distortion. This reduces energy efficiency since PAs are most efficient close saturation, where they generate nonlinear Moreover, conventional can induce coherent combining dis...

Power amplifiers (PAs) are inherently nonlinear devices and they are present in all transmitters of a communication equipment. As a result of transmitter nonlinearities, the transmitted signal spectrum expands into adjacent channels. Several linearizing techniques for power amplifiers have been proposed, but the most existing architectures assume that the PA has a memoryless nonlinearity. For w...

Co-design of digital signal-processing (DSP) algorithms and power-amplifier characteristics can lead to improved efficiency and linearity through a variety of strategies including: predistortion, DSP control over bias conditions, particularly the power supply voltage, and DSP generation of digital input signals for switching amplifiers. This paper discusses several amplifier architectures that ...