An analysis of dual-slug line tuners is presented for two cases: distributed-transmission-line slugs and lumped-capacitance slugs. The effect of loss on tuner performance in the case of the transmission-line model is investigated and the curves obtained are used in the design of a K-band tuner over the frequency range 12-26 GHz. Good agreement is obtained between predicted and measured results.
de los Reyes, E. Design of K-band slug tuners. "IEE proceedings. Part H. Microwaves, optics and antennas", Juny 1981, vol. 128, núm. 3, p. 146-150.