Narda 3043B

The Narda 3043B is a coaxial directional coupler engineered for precision signal sampling and attenuation in RF and microwave systems operating from 1.7 to 4.2 GHz. This Type N female connector device delivers stable coupling performance across its bandwidth with minimal insertion loss and excellent return loss characteristics, making it ideal for power monitoring, load isolation, and equipment protection in demanding RF applications.

– Technical Specifications

Frequency & Coupling Performance
• Frequency Range: 1.7 to 4.2 GHz
• Nominal Coupling: 10 dB, 20 dB, or 30 dB
• Coupling Deviation: ±0.5 dB maximum
• Frequency Sensitivity: ±0.25 dB
• Insertion Loss: 0.2 dB maximum
• Directivity: 20 dB minimum

Impedance & Return Loss
• Primary Line VSWR: 1.15 maximum
• Secondary Line VSWR: 1.20 maximum

Power Handling
The 3043B accommodates two power classes. The 10 dB model accepts 200 W average incident power and 50 W average reflected power. The 20 dB and 30 dB models are rated for 500 W average incident and reflected power. Peak power across all configurations reaches 10 kW.

– Key Features

• Flat attenuation response across 1.7–4.2 GHz band
• Tight coupling tolerance of ±0.5 dB ensures accurate signal sampling
• Low insertion loss of 0.2 dB maximum preserves system efficiency
• High directivity (20 dB minimum) minimizes coupling leakage
• Excellent primary and secondary line return loss performance
• High peak power handling: 10 kW
• Compact design: 5 lb shipping weight

– Typical Applications

• Power monitoring and measurement in RF transmitter chains
• Forward and reflected power detection
• System impedance matching and load isolation
• Test and measurement instrumentation
• Broadband RF and microwave signal conditioning

– Compatibility & Integration

Type N female connectors enable straightforward integration into standard 50 Ω RF systems. The coupler operates reliably across the L-band through S-band frequency spectrum, supporting applications requiring precision attenuation and isolation without significant signal degradation.