This paper presents lumped dual-frequency impedance transformers for frequency-dependent complex loads. According to different dual-frequency allocations of a complex load in Smith chart, three types of impedance matching networks are presented respectively. Several kinds of lumped circuit blocks are used as basic elements for constructing these transformers with design formula deduced. Various...

The formation of C60 nanowhiskers via the liquid-liquid interfacial precipitation technique presents a low-cost means of fabricating nanostructured fibres for use as active or passive elements in a number of possible applications. Recent measurements [9] have reported encouraging electrical characteristics that indicate the possibility of using C60 nanowhiskers to realise electronic devices wit...

The influence of the ions on the electrochemical impedance of a cell is calculated in the framework of a complete model in which the fractional drift-diffusion problem is analytically solved. The resulting distribution of the electric field inside the sample is determined by solving Poisson's equation. The theoretical model to determine the electrical impedance we are proposing here is based on...

For realizing a single chip microwave front-end, we studied the new design theory of impedance matching circuits for a Si-CMOS low noise amplifier (LNA) or power amplifier (PA), which are composed of coplanar waveguide (CPW) meanderline resonators and impedance inverters. We also present the simulated performances of CMOS-LNA or PA connected with input and output matching circuits. Finally, we ...

Owing to its well-known properties of possible power-noise match as well as superior noise performance, the inductively-degenerated low-noise amplifier is nowadays the most-widely used RF pre-amplifier topology. However, there is not much flexibility when setting the amplifier’s input impedance to match the source impedance, as for a given biasing condition, matching is achievable only for a pa...

Owing to its well-known properties of possible power-noise match as well as superior noise performance, the inductively-degenerated low-noise amplifier is nowadays the most-widely used RF preamplifier topology. However, there is not much flexibility when setting the amplifier’s input impedance to match the source impedance, as for a given biasing condition, matching is achievable only for a par...