Content that is free for public consumption with no subscription.
Background information on electromagnetic compatibility (EMC).
As practiced by many: designing for, and understanding EMC has been, and remains an ART more than a Science. However, it needn't be that way; using what you have learned in the proceeding pages, this page will attempt to remove some of the mystery from this subject--but NOT all!
Microwave Journal announces the release of Microwave Media, a new video platform for educational and demonstration videos and other multi-media content, such as webinars and slide shows. Microwave Media has hundreds of videos that are organized by application, product, event and company, including the popular Microwave Journal bi-monthly series, "Frequency Matters". The video platform allows editors, with a click of the mouse, to curate entire channels of quality content from sites such as YouTube and Vimeo.
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...
A useful system-level overview of Microwave and RF concepts from the author of the well known reference on RF circuit design.
A collection calculators, such as:
Web apps are utilized in the tutorials to allow you to experiment with the concepts
This tutorial and accompanying applet allow you to experiment with FM parameters and see the results at different stages of demodulation. Of particular interest is the applet showing the output spectrum for an adjustable modulation index, based on the values of the Bessel functions for the various sidebands.
This article describes the mathematical basis for tradeoffs among noise figure, gain and return loss of an LNA, with implementation in an EDA design tool
This interactive demo allows you to experiment with waves and reflections under various conditions. The demonstration shows mechanical waves but the concepts are analogous to EM waves on transmission lines.
Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open.
This tutorial applet demonstrates how the process of encoding and decoding CDMA user signals works. The user interface is in German but it is fairly easy to understand that the applet is combining data from four users.
This website features a comprehensive glossary of RF and Microwave terms along with many "rules of thumb" practical articles. It is now affiliated with the IEEE Microwave Theory and Techniques society.