Maury wide matching range slide screw tuners feature a slabline transmission structure with dual micrometer-driven probes that provide precise control of the mismatch magnitude. The positional repeatability and high matching range of these tuners make them ideally suited for use in device characterization applications where there is a critical need to establish impedances near the outer edge of the Smith chart and to reproduce electrical characteristics as a function of mechanical position. They are designed to serve as a matching network for reducing relections caused by mismatches present in a transmission line, or to introduce a controlled mismatch into an otherwise matched transmission line.