Description
The 3dB 5W RF Fixed Attenuator is a high-performance passive component designed to reduce the power of an RF signal by exactly 3dB, effectively cutting the signal power in half. With a 5-Watt power handling capacity, it is robust enough to manage moderate power levels from transmitters and amplifiers, stepping them down to safe levels for sensitive receivers or spectrum analyzers. This specific model is optimized for frequencies from DC to 6GHz, making it an essential tool for sub-6GHz 5G, Wi-Fi 6, and standard telecommunications testing.
The attenuator features an SMA Male to SMA Female inline configuration, allowing it to be easily integrated into existing cable assemblies or connected directly to equipment ports. It is constructed with high-grade resistive elements that ensure excellent flat frequency response and a low Voltage Standing Wave Ratio (VSWR) across its entire operating range. Housed in a ruggedized stainless steel or nickel-plated brass body with integrated cooling fins, it efficiently dissipates heat to maintain consistent attenuation accuracy even during continuous operation.
Key Technical Advantages
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Precise 3dB Reduction: Provides a reliable 2:1 power reduction, allowing for accurate signal balancing and protection of equipment with sensitive input thresholds.
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Broad 6GHz Bandwidth: Supports a wide frequency spectrum, ensuring versatility across 4G/LTE, 5G NR, GPS, and dual-band Wi-Fi applications.
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Superior Heat Dissipation: The 5W power rating is supported by a robust thermal design, ensuring the attenuator maintains its specified value without thermal drifting.
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Excellent Impedance Matching: Precision-engineered internals provide a low VSWR, minimizing signal reflections that could otherwise damage power sources or skew measurement results.
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Durable SMA Interface: Features standard high-reliability SMA connectors with gold-plated center contacts for low insertion loss and hundreds of stable mating cycles.
Key Features
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Interface Type: SMA Male (Plug) to SMA Female (Jack).
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Attenuation Value: 3dB (Fixed).
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Power Rating: 5 Watts (Continuous).
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Frequency Range: DC – 6.0 GHz.
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Impedance: 50 Ohm (Standard).
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Construction: Stainless Steel or Nickel-Plated Brass body with PTFE dielectric.
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Common Application: RF laboratory testing, signal leveling in DAS, protection of sensitive receivers, and amplifier output attenuation.
Technical Summary
| Parameter | Specification |
| Impedance | 50 Ohm (Nominal) |
| Frequency Range | DC – 6 GHz |
| Attenuation Accuracy | ±0.5 dB to ±0.8 dB |
| VSWR | ≤ 1.25:1 (Typical) |
| Max Input Power | 5 Watts (Average) |
| Peak Power | 100 Watts (5µs pulse width) |
| Operating Temp | -55°C ~ +125°C |









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