Compact high reflection and harmonic frequency impedance tuners use the slide screw principle and new slabline structures, either with three slots arranged at 120.degree. to each other or four slots arranged in a cross form 90.degree. to each other. The tuners comprise up to three and up to four mobile carriages correspondingly, which slide horizontally across the length of the slabline(s), each carriage holding one or two stepper motors and one or two conductive RF probes, which can be inserted into the corresponding slots of the slabline(s) and create adjustable reflection factors through capacitive coupling with the center conductor of the slabline(s). The length of the tuners is considerably reduced, since the probes share the same sections of slabline. The tuners can be used for wideband, high reflection and multi-frequency (harmonic) tuning.
Compact harmonic impedance tuner / 8,188,816
Tuesday, May 29, 2012