An open sample holder for electrical measurements between 0.1 and 6.0 GHz

A sample holder for either transmission or reflection measurements is described. Basically a length of five−wire or ’’cage’’ transmission line, when terminated with a 50 Ω load it exhibits (in air) a residual VSWR of less than 1.05 below 2.0 GHz and (with one exception) less than 1.08 up to 6.0 GHz. Designed for use with solid samples, it may be adapted to powders or fluids.