Load pull tuner on waveguide wafer-probe

A load pull tuner-waveguide-to-wafer-probe adapter assembly comprising:

• a partly slotted quarter-circle waveguide-to-wafer-probe adapter, and two remotely controlled reflective tuning probes, a first tuning probe and a second tuning probe,
• wherein
• the partly slotted waveguide-to-wafer-probe adapter comprises:
• a rectangular waveguide transmission line having a top and a bottom broad wall and two narrow side walls, forming a 90-degree waveguide arc and being connected on one end to a waveguide flange and on the other end to a wafer-probe head;
• and wherein
• the 90-degree waveguide arc includes two slots, centered on the top broad wall along the waveguide, a first slot towards the wafer-probe head and a second slot towards the waveguide flange, each said slot being at least one half of a wavelength long at a minimum frequency of operation of the load pull tuner;
• and wherein
• two mobile carriages, a first mobile carriage and a second mobile carriage slide along the top broad wall of the waveguide arc, moved by a radial arm, which rotates around a virtual center of the waveguide arc and is controlled using stepper motors and appropriate gear;
• and wherein
• the first tuning probe is attached to the first mobile carriage and the second tuning probe is attached to the second mobile carriage, each said tuning probe being inserted contactless at fixed penetration into the associated slots,
• and wherein
• the mobile carriages are spring-loaded towards the broad wall of the waveguide arc and can tilt away from the waveguide broad wall, when hitting a stop, and lift the tuning probes out of the waveguide slots.