The Narda 4202B is a directional RF coupler engineered for signal power division and monitoring across microwave frequencies. This compact module performs precise coupling with low insertion loss and high directivity, delivering stable performance from 1 to 12.4 GHz. Available in 10 dB and 20 dB coupling configurations, the 4202B handles 20 W average power and 3 kW peak power, making it suitable for demanding test, measurement, military, and commercial applications.
Technical Specifications
Frequency & Coupling Performance • Frequency range: 1 to 12.4 GHz
• Coupling: 4202B-10 (10 dB) and 4202B-20 (20 dB)
• Coupling variation: ±1.5 dB
• Frequency sensitivity: ±0.5 dB
• Directivity: 4202B-10 (12 to 15 dB); 4202B-20 (15 dB typical and guaranteed)
• Insertion loss: 4202B-10 (0.70 to 1.30 dB); 4202B-20 (0.70 to 0.75 dB) Power Handling • Average power: 20 W (guaranteed with source and load VSWR of 1.2:1)
• Peak power: 3 kW Impedance • VSWR (primary): 1.35:1
• VSWR (secondary): 1.50:1 – Key Features • Dual-model lineup optimizes coupling selection for specific measurement requirements
• Low insertion loss design minimizes signal attenuation in primary path
• SMA female connectors support standard RF integration
• Compact module construction (77 g) enables space-constrained installations
• Specified performance at 23 °C – Typical Applications • RF power monitoring and signal sampling in transmit chains
• Test and measurement setups requiring directional signal detection
• Military systems demanding high reliability under demanding conditions
• Commercial microwave systems with stringent power handling requirements – Compatibility & Integration The 4202B interfaces via SMA female connectors. Both variants operate across the full 1 to 12.4 GHz band, allowing model selection based on coupling and directivity requirements rather than frequency constraints.
