Hftools is a python package containing useful tools for high frequency electrical engineering problems. Hftools is focused on generally useful tools such as file readers, multiport classes, an improved array class (hfarray), dataset class. More specialized tools will be broken out into seprate packages. One such package is caltools which contains tools for doing Vector Network Analyzer (VNA) calibrations.

The hftools package is built around the hfarray object which is an extension to the regular numpy ndarray object. The extension adds a axis descriptor objects that identify the purpose of each dimension of an array, e.g. frequency axis, repeated measurements axis, voltage sweep axis, or matrix row/column axis. The axis descriptor objects are used to align arrays for broadcasting. The axis descriptor object can also contain information about units and preferred formatting when converting to text.

The hftools.plotting package adds new projections to matplotlib to simplify plotting of complex numbers, e.g. db, real, imag, mag, groupdelay. Some automation has also been included for the axis labels. If the first axis in a plotted hfarray has the unit Hz then the x-axis will be labelled "Frequency [Hz]".