Two probe low profile tuner

A load-pull tuner comprising

• a low loss slotted airline (slabline) having an input port, an output port, two sidewalls forming a channel, an “S” shaped center conductor and
• two remotely controlled mobile carriages #1 and #2, saddled facing each-other on the sidewalls across the channel, each said carriage holding a metallic tuning probe, which it keeps inserted in the channel at fixed penetration and moves along the slabline, said tuning probe being capacitively coupled with the center conductor, carriage #1 holding tuning probe #1 and carriage #2 holding tuning probe #2, wherein
• the “S” shaped center conductor resides in its entire length at equal distance between the sidewalls of the slabline and has a straight center section between two end bends which are terminated with coaxial connectors, the first bend at the input port and the second bend at the output port, each said bend having a span B;
• and wherein
• the metallic tuning probes are inserted diametrically into the channel at fixed distances from the center conductor, sharing the slabline and capable of crossing over;
• and wherein
• carriage #1 moves the tuning probe #1 to a position X1 and
• carriage #2 moves the tuning probe #2 to a position X2 along the slabline.