Download Distortion in Rf Power Amplifiers (Artech House Microwave by Joel Vuolevi PDF

By Joel Vuolevi

A remedy of distortion in RF energy amplifiers. It seeks to provide assistance on designing simply linearizable structures that experience low reminiscence results. The reader is out there an in depth knowing of the way the matching impedances of an influence amplifier and different RF circuits could be tuned to lessen total distortion. It additionally demonstrates the right way to construct types that may be used for distortion simulations. The dimension method should still let the reader to gauge the amplitude and part of distortion elements and realize reminiscence results. the quantity explains that by way of killing reminiscence results, it's attainable to take advantage of basic linearizers, corresponding to analogue predistortion, and nonetheless in attaining adequate functionality. It provides a distortion research approach with a purpose to repeat the research with different amplifier buildings. With over one hundred twenty equations and greater than one hundred ten illustrations, this sensible reference seeks to supply the help essential to create amplifiers compatible for linear transmitters, and gives perspectives of semiconductor modelling.

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Encompasses just about all facets of microwave iteration, measurements, and processing, giving every one subject equivalent weight
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incorporates a myriad of illustrations, homework difficulties, references, and numerical examples

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Detailing the lively and passive facets of microwaves, Microwave Engineering: options and basics covers every thing from wave propagation to mirrored image and refraction, guided waves, and transmission strains, delivering a entire realizing of the underlying rules on the middle of microwave engineering. This encyclopedic textual content not just encompasses approximately all aspects of microwave engineering, but in addition provides all topics—including microwave iteration, size, and processing—equal emphasis. jam-packed with illustrations to help in comprehension, the book:

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Additional resources for Distortion in Rf Power Amplifiers (Artech House Microwave Library)

Example text

In short, the linear node voltages are solved first, using small-signal analysis. Then, nonlinear analysis is started by modeling the nonlinearities by current sources and short (open)-circuiting the linear voltage (current) sources. Using linear analysis again, the second-order voltage responses of the distortion currents are calculated, and the procedure can be repeated all the way to higher order responses. An example of the direct calculation method will be given later on in this chapter. Since the nonlinearities of the circuit elements are modeled by current sources, they will be explained in more detail.

Then, nonlinear analysis is started by modeling the nonlinearities by current sources and short (open)-circuiting the linear voltage (current) sources. Using linear analysis again, the second-order voltage responses of the distortion currents are calculated, and the procedure can be repeated all the way to higher order responses. An example of the direct calculation method will be given later on in this chapter. Since the nonlinearities of the circuit elements are modeled by current sources, they will be explained in more detail.

Similar to the polynomial input-output model, AM-AM and AMPM curves, widely used as a figure of merit of nonlinearity, are narrowband approximations of real bandwidth-dependent systems. Nevertheless, being well suited to the study of memory effects, the component-level Volterra method is the method of choice in this book. One important property of the Volterra method is that the spectral components at the output can be expressed analytically, provided that the input signal is a sinusoid (or a sum of sinusoids).

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