Power Amplifiers

RF Power Amplifier design strives for the highest possible efficiency.

RFPA Envelope Tracking

Author: 

Earl McCune

Operating Modes of Dynamic Power Supply Transmitter Amplifiers

Any amplifier operated with a varying supply voltage is actually a three-port circuit, having two inputs and one output. When an amplifier is characterized as a three-port for dynamic supply voltage operation, three separate operating modes...

Smith Chart Matching Web App

Author: 

Rex Frobenius

Update November 2021: log-in no longer required to use this web app!

Use this handy Smith Chart web app to create matching networks. Easiest tool to use: drag elements right on the chart! Supports multiple frequencies, transmission line elements, etc. Note: please register for a free account for continued access to the Smith Chart app.  

New HTML 5 Version Now Available A new version of the popular Smith Chart app that does not require any plug-in has now replaced the older Java applet version.

Practical RF Circuit Design for Modern Wireless Systems: Active Circuits and Systems

Author: 

Rowan Gilmore and Les Besser

The second of two volumes, this is a comprehensive treatment of nonlinear circuits, introducing the advanced topics that professionals need to understand for their RF (radio frequency) circuit design work. It presents an introduction to active RF devices and their modelling, and explores nonlinear circuit simulation techniques. Design techniques are addressed for RF transistor amplifiers, oscillators, mixers and frequency multipliers.

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