Some measurements on the temperature variation of loss angle of a group of low-loss liquid dielectrics at microwave frequencies

A method is outlined by which precision measurements may be made on the loss-angle of low-loss liquid dielectrics over a range of temperatures at microwave frequencies. Results are presented for the temperature variation of loss of six low-loss materials (n-hexane, n-heptane, cyclohexane, cycloheptane, cyclo-octane and isooctane) at two microwave frequencies ( approximately=9 and approximately=36 GHz). The data obtained are compared, wherever possible, with data obtained by other workers. A comprehensive list of references to such measurements is also given.