The Narda 4226-10 is a broadband directional coupler engineered for precise RF signal sampling and power monitoring across wide frequency spans. Operating from 500 MHz to 18 GHz with 10 dB nominal coupling, this component delivers the directivity and insertion loss performance required in demanding test and measurement setups. SMA female connectors and 50-ohm impedance enable straightforward integration into standard RF systems.
Technical Specifications
Frequency & Coupling Performance
• Frequency range: 500 MHz to 18 GHz
• Nominal coupling: 10 dB
• Coupling variation: ±1 dB
• Frequency sensitivity: ±1.0 dB maximum deviation from nominal
Insertion Loss & Directivity
• Insertion loss (coupled power excluded): 0.85 dB
• True insertion loss (maximum): 1.5 dB
• Directivity: 15 dB minimum (500 MHz to 12.4 GHz); 12 dB minimum (12.4 GHz to 18 GHz)
VSWR & Power Handling
• VSWR—primary line: 1.5:1 maximum
• VSWR—secondary line: 1.5:1 maximum
• Average power handling: 20 W
• Peak power handling: 3 kW (guaranteed at source and load VSWR of 1.2:1)
Physical & Electrical
• Impedance: 50 ohms
• Connectors: SMA (female)
• Dimensions: 4.40 in. × 0.77 in. (primary); mounting depth 2.906 in.
• Weight: 97 grams (3.4 oz)
• Operating temperature: Guaranteed at 23 °C
– Key Features
• Flat coupling response across 500 MHz to 18 GHz enables predictable signal extraction over ultrawideband applications
• High directivity (minimum 15 dB across most operating range) minimizes reverse-path coupling errors
• Low insertion loss preserves signal integrity in cascaded measurement chains
• Dual 1.5:1 VSWR specifications on both primary and secondary lines ensure system stability
• Compact SMA-female form factor fits standard coaxial test configurations
– Typical Applications
• RF power monitoring and leveling in test instruments
• Broadband signal sampling for network analysis
• Directional sensing in microwave systems
• Power measurement across C-band, X-band, and Ku-band frequencies
– Compatibility & Integration
The 4226-10 integrates into RF and microwave systems operating within its 500 MHz–18 GHz envelope. SMA connectors and 50-ohm impedance align with standard RF infrastructure. The coupler suits applications where both forward and reverse power monitoring demand minimal signal perturbation and high directional isolation.
