Touchstone file format

A Touchstone file is a standard format used in electrical engineering to describe how components, like filters or antennas, behave at different frequencies. It contains data showing how much signal a component reflects or passes through at various frequencies, typically expressed as parameters, such as S-parameters. These files help engineers simulate and analyze circuit performance before physical construction, ensuring designs meet desired specifications. The format is widely supported by simulation tools, making it a key resource in designing high-frequency electronic systems.