Focus filed a US patent application on “INTEGRATED TERA-HERTZ SLIDE SCREW TUNER”

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A waveguide low profile slide-screw impedance tuner, for high tuning range (GAMMA) and seamless on-wafer integration, uses spring-loaded control of gold-plated alumina (Al2O3) tuning probe, controlling amplitude and phase of the reflection factor using miniature high precision piezo-electric actuators. This ensures the highest possible passive reflection factor GAMMA at THz frequencies. The tuner is integrated on appropriately modified commercially available THz waveguide wafer probes.