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RF ATTENUATOR 50OHM 300W |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 100OHM |
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RF ATTENUATOR 300OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 75OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 120OHM 5% HALF FLG |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 1DB 2SMD FLAT LEAD |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 50OHM |
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RF ATTENUATOR 100OHM |
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RF ATTENUATOR 100OHM |
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RF ATTENUATOR 50OHM |
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RF (Radio Frequency)/IF (Intermediate Frequency) attenuators and RFID (Radio Frequency Identification) attenuators are passive or active devices designed to reduce signal strength in wireless communication systems. They play a critical role in signal conditioning, impedance matching, and protecting sensitive components from over-power conditions. These attenuators are essential in ensuring optimal performance in modern communication systems, test equipment, and RFID networks.
| Type | Functional Features | Application Examples |
|---|---|---|
| Fixed Attenuators | Provide constant attenuation across defined frequency bands | Signal leveling in base stations |
| Variable Attenuators | Adjustable attenuation via manual/electronic control | Calibration in test instruments |
| Digital Step Attenuators (DSA) | Programmable attenuation steps with digital interfaces | 5G beamforming systems |
| Surface Mount Attenuators | Miniaturized SMD packages for PCB integration | IoT module signal conditioning |
| Waveguide Attenuators | High-power handling for microwave frequencies | Satellite communication systems |
Typical RF/IF attenuators consist of: - Resistive Networks: Pi/T-type configurations using thin-film resistors - Dielectric Materials: Alumina or ceramic substrates for RF stability - Connectors: SMA, N-Type, or waveguide ports with 50/75 impedance - Housing: Aluminum alloy enclosures for EMI shielding - Thermal Management: Heat sinks or thermal vias for power dissipation
| Parameter | Description | Importance |
|---|---|---|
| Frequency Range | Operational bandwidth (e.g., 0.1 6 GHz) | Determines application compatibility |
| Attenuation Range | Signal reduction capacity (e.g., 0 30 dB) | Defines dynamic range control |
| Power Handling | Max average/Peak power (e.g., 2W/10W) | Prevents thermal damage |
| VSWR | Voltage Standing Wave Ratio (e.g., <1.5:1) | Indicates impedance matching quality |
| Insertion Loss | Passive signal loss at minimum attenuation | Affects system efficiency |
| Temperature Stability | Attenuation drift over temperature (e.g., 0.05 dB/ C) | Ensures consistent performance |
Key industries include: - Telecommunications: 5G/4G base stations, fiber optic networks - Test & Measurement: Spectrum analyzers, signal generators - Medical: MRI RF chain protection - Automotive: V2X communication systems - RFID Systems: Reader power calibration, tag detection range control
Case Example: In UHF RFID systems (860 960 MHz), fixed attenuators ensure consistent read range by limiting backscatter interference.
| Manufacturer | Representative Product | Key Specifications |
|---|---|---|
| Keysight Technologies | 8491B Waveguide Attenuator | 2.6 40 GHz, 10W average power |
| Analog Devices | ADL5240 DSA | 0.1 4 GHz, 31.5 dB range (0.5 dB steps) |
| Mini-Circuits | VAT-2+ | DC 8 GHz, 0 20 dB manual attenuation |
| Bourns Inc. | RCAT2450 | 2.4 5 GHz, 0402 SMD package |
Key considerations: 1. Match frequency range and impedance (50/75 ) 2. Calculate required attenuation range with safety margin 3. Verify power handling (consider peak pulses in RFID) 4. Environmental factors (temperature, vibration) 5. Package type (coaxial/SMD/waveguide) 6. Cost vs. precision trade-offs ( 0.5 dB vs. 2 dB tolerance)
Emerging trends include: - Development for mmWave (24 100 GHz) 5G systems - Integration with MEMS for reconfigurable RF front-ends - Increased adoption of absorbing materials for size reduction - Growing demand for RFID-specific IC-integrated attenuators - Advancements in thermal management for high-power GaN systems