Antenna tools

When dealing with antennas and transmission lines, there are a lot of simple calculations one has to do again and again. Formulas are simple, but with a pocket calculator it's a tedious job. In these pages there is a collection of handy JavaScript calculators intended to simplify the process.

The calculators are embedded in the HTML files so, if you need/like them, you can simply save the pages you need on your PC and they will work even without network connection.

Every page solves a specific problem: for each problem, the description not only explains the problem, its context and the approach to solve it. It also tries to explain the involved physical phenomenon and to give some practical tricks.

These pages are just a collection of handy tools and are by far not exhaustive. But I hope they may be of some help in many situations.

Power and amplitude: Watts, Volts and referenced Decibels Field regions around an antenna Field strength and received power Field generated by a transmitter at a given distance Isotropic loss of free-space radiation Theoretical maximum gain and bandwidth of an antenna Transmission line reflections, standing waves and return loss