The Narda Microline 3040-30 is a coaxial directional coupler for signal sampling and power monitoring across the 0.240–0.500 GHz band. Operating with 30 dB coupling and ±1.2 dB coupling variation, it delivers the directivity and insertion loss performance required for accurate RF measurements without mechanical adjustment. This unit handles 500 W average power and 10 kW peak power, making it suitable for both laboratory benches and field deployments in commercial and military applications.
Technical Specifications
• Frequency Range: 0.240–0.500 GHz
• Coupling: 30 dB
• Coupling Variation: ±1.2 dB
• Directivity: 30 dB
• Insertion Loss: 0.2 dB
• VSWR (Main Line): 1.10:1
• VSWR (Auxiliary Line): 1.15:1
• Average Power Handling: 500 W
• Peak Power Handling: 10 kW
• Reflected Power Capacity: 500 W
• Connectors: N Type (Female)
• Weight: 0.91 kg
• Grade: Commercial, Military
– Key Features
• Low insertion loss of 0.2 dB minimizes signal degradation on the main transmission line.
• Directivity of 30 dB enables accurate separation of forward and reflected power signals.
• Tight coupling variation of ±1.2 dB ensures repeatable measurement accuracy across the operating band.
• High power capacity accommodates both CW and pulsed RF environments.
• Passive design requires no external power or control lines.
– Typical Applications
• Signal sampling for monitor and control circuits
• Forward and reflected power measurement in transmission systems
• VSWR and impedance measurement systems
• Attenuation characterization with reduced reflection error
• RF amplifier biasing networks
• Power monitoring in test and measurement setups
– Compatibility & Integration
N-type female connectors on both main and auxiliary ports enable direct integration into standard RF test systems. Low VSWR on both lines—1.10:1 main and 1.15:1 auxiliary—minimizes impedance discontinuities and ensures clean signal coupling for analysis and monitoring applications.
