Microwaves101 Calculators

Microwaves101 groups RF network, cascade and transmission-line tools, with Excel downloads for additional tasks. Its coplanar-waveguide form takes relative permittivity, trace width, ground spacing and substrate thickness to estimate characteristic impedance and effective permittivity. The geometry dimensions may use any consistent units. This model has no ground plane beneath the dielectric and assumes air/free space below it; the page directs grounded configurations to a different tool. It also omits strip thickness and calls the result approximate, recommending 3D electromagnetic analysis for critical designs. The catalogue still labels its separate percent-bandwidth tool broken.