Software/Calculator

Pasternack's website offers a large selection of RF calculators and converters available for free for general use.

Pasternack's RF calculators and conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. Our RF and microwave calculators and converters will provide the figures you need for your radio frequency engineering needs. RF calculations and RF conversions include metric-standard, link budget, coax cable, power, attenuation, frequency and many more.

QUCS is a freeware circuit simulator that supports S-parameter analysis, among other types. It is available for Windows, Linux and OSX operating systems, with varying levels of support from the community.

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 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 applet allows you to experiment with filters. Change filter type, cutoff frequency, and play different sounds through the filter.

A Java applet that let's you experiment with the Fourier series for different wave shapes. You can also listen to the waveforms.

Our dB and dBm calculators allow you to quickly convert between power ratios and decibel notation. The new versions allow for additional conversions from a drop down menu. You can still access the old versions if you prefer.

• dB Calculator (old version)
• dBm Calculator (old version)