Narda 4203-16

The Narda 4203-16 is a broadband coaxial directional coupler engineered for RF and microwave signal coupling across 2.0 to 18.0 GHz. It delivers 16 dB nominal coupling with ±0.5 dB variation, enabling precise signal division in test setups, radar systems, and communication infrastructure. The coupler maintains low insertion loss of 0.8 dB (typical) and high directivity—15 dB from 2.0 to 12.4 GHz, stepping to 12 dB above 12.4 GHz—making it suitable for applications demanding controlled power sampling with minimal signal degradation.

– Technical Specifications

• Frequency Range: 2.0 GHz to 18.0 GHz
• Nominal Coupling: 16 dB
• Coupling Variation (Max): ±0.5 dB
• Insertion Loss (True): 0.8 dB typical
• Insertion Loss (Excluding Coupled Power): 0.65 dB typical
• Directivity: 15 dB (2.0–12.4 GHz); 12 dB (12.4–18.0 GHz)
• VSWR Primary Line (Max): 1.35:1
• VSWR Secondary Line (Max): 1.40:1
• Frequency Sensitivity (Max): ±0.5 dB
• Maximum Deviation from Nominal: ±1.0 dB
• Average Power Handling: 20 W
• Peak Power Handling: 3 kW
• Connectors: SMA Female (Primary and Secondary)
• Weight: 1.8 oz (51 g)
• Dimensions: 2.12 in. L × 0.73 in. H × 0.38 in. W
• Operating Temperature: Specs guaranteed at 23 °C; test data supplied at 25 °C

– Key Features

• Flat frequency response across the 2–18 GHz band
• Low, fine-grain ripple characteristics
• Compact form factor suitable for space-constrained applications
• MIL-environment construction for demanding conditions
• SMA connectors for standard RF/microwave integration

– Typical Applications

• Test and measurement signal sampling
• Radar systems monitoring and diagnostics
• Communication infrastructure signal analysis

– Compatibility & Integration

The 4203-16 integrates readily into RF and microwave systems via standard SMA connectors. Primary and secondary line VSWR values ensure minimal reflections when terminated into matched loads (1.2:1 VSWR source and load guaranteed for rated power handling).