The Maury Microwave 1819B is a manual triple-stub impedance tuner for RF and microwave applications spanning 800 MHz to 4 GHz. It introduces variable shunt susceptance into coaxial transmission lines, enabling impedance transformation, power transfer optimization, and controlled mismatch injection. The instrument uses precision slide screw technology with broadband slab line transmission and passive probes positioned approximately one-quarter wavelength at mid-band frequencies. Stub travel extends 7.5 inches (19.1 cm) and moves over ½ wavelength at the lowest operating frequency, supporting tuning resolution required for impedance analysis and device characterization.
Technical Specifications
• Frequency Range: 800 MHz to 4 GHz
• Configuration: Triple-stub tuner
• Tuning Mechanism: Manual with variable shunt susceptance
• Connector Type: SMA
• Interface: Coaxial transmission line
• Stub Travel Length: 7.5 inches (19.1 cm)
• Stub Spacing: 0.75 inches (1.9 cm), 1 inch (2.5 cm)
• Probe Design: Passive probes positioned at approximately ¼ wavelength at mid-band
• Travel Range: ½ wavelength at lowest operating frequency
– Key Features
• Precision slide screw actuation for repeatable tuning
• Broadband slab line transmission structure for low insertion loss
• Direct manual control suitable for hands-on impedance optimization
• Passive probe architecture eliminates active component dependencies
• SMA connectors for standard RF integration
– Typical Applications
• Impedance matching and power transfer optimization
• Controlled reflection coefficient generation for system characterization
• Tuned reflectometer configurations
• DC return path provision for single-ended mixers and detectors
• Laboratory and R&D impedance analysis
– Compatibility & Integration
The 1819B accepts SMA connectors and integrates into coaxial test systems. It operates within the 800 MHz to 4 GHz band, positioning it between lower-frequency models (1819A: 0.4–1 GHz) and higher-frequency variants (1819C: 2–18 GHz; 1819D: 4–18 GHz). Type N connector equivalents are available in the 1878 series. Maury Microwave manufactures to ISO 9001:2015/AS9100D standards using CNC-precision fabrication.
