The IFR Aeroflex 24-30-43-LIM is a 30 dB microwave fixed attenuator engineered for precise signal power reduction across DC to 8.5 GHz. This 50 Ω device maintains signal integrity while delivering low intermodulation distortion, making it essential for sensitive RF applications in telecommunications, aerospace, and defense. The LIM designation specifies exceptionally low IM3 performance: -100 dBc reflected and -110 dBc through at +43 dBm carrier levels. Built to MIL-DTL-3933, it features a black finned aluminum body with gold-plated beryllium copper contacts and handles 50 watts average power (derated to 2.5 watts at +125°C) or 5 kilowatts peak. Attenuation accuracy is ±0.60 dB (DC–4 GHz) and ±1.00 dB (4–8.5 GHz), with minimal power and temperature coefficients. Available in Type N or SMK connectors, male or female configurations.
Technical Specifications
• Frequency Range: DC to 8.5 GHz
• Attenuation Value: 30 dB
• Nominal Impedance: 50 Ω
• Attenuation Accuracy: ±0.60 dB (DC–4 GHz); ±1.00 dB (4–8.5 GHz)
• Power Rating (Horizontal Mount): 50 watts average (+25°C, bi-directional); 5 kW peak (5 µsec pulse, 0.5% duty cycle)
• Power Coefficient: <0.0003 dB/dB/watt
• Temperature Coefficient: <0.0004 dB/dB/°C
• Operating Temperature: -55°C to +125°C
• 3rd Order Intermodulation (IM3): -100 dBc reflected; -110 dBc through (at ±43 dBm, 869/891 MHz)
• Mode Free Operation: Up to 10 GHz
• Weight: 280 g maximum
– Key Features
• Low intermodulation distortion (LIM option) for linear RF chains
• Frequency-flat response with swept attenuation and SWR data from 50 MHz to 8.5 GHz
• MIL-DTL-3933 environmental compliance
• Gold-plated beryllium copper contacts for reliability
• Linear power derating from 50 watts to 2.5 watts across temperature range
– Typical Applications
• Telecommunications signal conditioning
• Aerospace and defense RF systems
• High-power transmit chains requiring low distortion
• Test and measurement signal attenuation
– Compatibility & Integration
• Type N connectors (MIL-STD-348 interface, mate with MIL-C-39012)
• SMK 2.92mm connectors (mate with SMA, 3.5mm, and 2.92mm options)
• Male and female configurations available
