The Weinschel 33 is a high-performance coaxial fixed attenuator engineered for precision signal control in RF and microwave test systems. This bi-directional attenuator delivers stable, accurate attenuation across DC to 8.5 GHz, with extended operation to 10 GHz in mode-free applications. Built for demanding measurement environments, it combines low temperature and power coefficients with MIL-DTL-3933 environmental compliance.
Technical Specifications
Frequency & Impedance
• Frequency Range: DC to 8.5 GHz (mode-free operation to 10 GHz)
• Nominal Impedance: 50 Ω
• VSWR: 1.20 (DC–4.0 GHz); 1.30 (4.0–8.5 GHz)
Attenuation
• Available Values: 1 dB, 3 dB, 6 dB, 10 dB, 20 dB, 30 dB, 40 dB
• Accuracy (WA33L): ±0.8 dB (1–2 dB); ±1.0 dB (3–30 dB)
• Temperature Coefficient: < 0.0004 dB/dB/°C
• Power Coefficient: < 0.005 dB/dB/W
Power Handling
• Average Power: 25 W (bi-directional) at +25°C, derating to 2.5 W at +125°C
• Peak Power: 5 kW (5 µsec pulse, 0.25% duty cycle)
Intermodulation (LIM models)
• IM3 Reflected: –100 dBc
• IM3 Through: –110 dBc
• Test Conditions: Two signals @ 869/891 MHz, +41 dBm each; input limited to 10 W
Connectors & Physical
• Types: Type N, SMA, TNC (male/female)
• Dimensions: 44.50 × 38.10 × 37.08 mm; Weight: 0.17 kg
• Construction: Black finned aluminum with passivated stainless steel connectors; gold-plated contacts
Environmental
• Operating Range: –55°C to +125°C
• Compliance: MIL-DTL-3933; RoHS options available
– Key Features
• Bi-directional signal flow with predictable attenuation across broad frequency span
• Extremely low temperature and power coefficients ensure stable performance under thermal stress
• High peak power handling supports pulsed and CW applications
• Low intermodulation distortion in critical signal paths
• Rugged passivated connectors rated for non-destructive mating
– Typical Applications
• RF/microwave signal conditioning and test
• Impedance matching networks
• Gain and loss measurements
• High-power measurement systems
• Military and aerospace test environments
– Compatibility & Integration
Connector interfaces comply with MIL-STD-348A and mate with MIL-PRF-39012 connectors. Multiple connector options (Type N, SMA, TNC) accommodate integration into standard RF test benches and systems.
