Design of an ultra-broadband power amplifier using distributed network synthesis

Abstract

This paper presents a methodology for designing ultrabroadband power amplifiers (PAs) based on distributed network synthesis and offers impedance matching of a power device by parasitic absorption. For the synthesis of broadband matching circuits, transfer functions of distributed networks are provided using an equal-ripple approximation, and power device models are derived using negative-image modeling. An impedance-matching circuit that absorbs power device models can be synthesized by properly choosing the minimum insertion loss (MIL) and ripple parameters of the transfer function. As an example, distributed network synthesis is applied to the design of an ultra-broadband PA, and experiments are carried out.

An Investigation into Cascading Failure in Large-Scale Electric Grids: A Load-Redistribution Approach

“…Real-world networks are usually combinations of these three typical networks, and thus, investigating these typical networks can provide innovative and impactful solutions to optimization problems and reliability and risk assessments. For instance, it has been possible to study and enhance the stability of communication networks through such analysis [18], and the issue that causes such instability can be effectively eliminated through vigorous research of complex networks [19]. The knowledge and research experience of complex network have enabled us to investigate the mechanism of cascading failures in power systems.…”