A passive network possessing an input impedance which is positive real in nature poses
difficulties with regard to obtaining an optimal impedance for power amplifiers (PAs) with two …

This paper proposes a compact and low-cost architecture with only a single feedback loop to
implement concurrent dual-band digital predistortion (DPD) of power amplifiers (PAs). This …

In this paper, an extended Chebyshev function is proposed to adapt the matching condition
of the power amplifier (PA) by introducing a new factor. A set of impedance functions can be …

In this paper, a novel matching structure is introduced to implement accurate impedance
matching at intermodulation (IM) frequencies in concurrent dual-band power amplifiers …

A systematic design methodology including novel crest factor reduction (CFR) and power
amplifier (PA) efficiency enhancement techniques for concurrent dual-band transmitters is …

Concurrent multi-band delta-sigma modulation (CMB-DSM) with out-of-band noise
cancellation is presented for the first time. A scaled replica modulator creates anti-phased …

This article presents a theoretical explanation of the efficiency degradation in wideband
radio frequency power amplifiers (RFPAs) under concurrent dual-band operation that is still …

This paper studies the linearity of dual-input Doherty power amplifiers. We propose a
linearization scheme that uses a combination of an efficiency-optimized static splitter and a …

There is an impedance conflict between the fundamental harmonic of f 2 and the second of f
1 if f 2= 2f 1. In this brief, a methodology employing the harmonic active load modulation …

For multiband power amplifiers (PAs), high impedance at the second-order intermodulation
frequencies at the drain can result in severe nonlinear distortion in concurrent mode. To …