A Wideband Attenuation and Phase Controller / 9,112,250

Thursday, August 18, 2016

A continuously manually or remotely adjustable microwave attenuator and linear phase shifter is made using a two section slabline structure in which a “U” formed center conductor forms a line –stretcher to adjust the transmission phase and slivers of ferromagnetic material are inserted into the magnetic field of the slabline, or thin layers of dielectric material are inserted into the electric field serving either way to reducing the amplitude of the transmission factor, or increase the attenuation. The unit is manually or remotely controlled, in which case its transmission behavior can be calibrated on a VNA and used in test software for automated differential load pull operations.