RF Attenuators

RF attenuators act as resistors and are used to reduce the level of a signal within radio frequency applications and RF circuits. They have many benefits, including protecting a circuit stage from receiving a current that's too high. RF attenuators can also improve impedance match, ensuring power transfer from source to load is optimised.



Types of RF attenuators



RF attenuators come in three types:



  • Fixed RF attenuators provide an unchanging value where specific attenuation levels are needed.

  • Switched RF attenuators are made up of switches that allow varying levels of attenuation.

  • Variable RF attenuators are used when it's necessary to continuously change the level of a signal.


Choosing the right RF attenuators



To select the right RF attenuator a number of specifications need to be considered, such as attenuation, frequency and impedance. Attenuation is measured in decibels (dB) and depending on the type of attenuation you need this will either be fixed or within a range. RF attenuators are designed for devices with a certain impedance and it's important to match the impedance of the attenuator to the circuit where it will be used.


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N Plug to N Socket 0.3 dB, 3 dB - 50Ω DC to 6GHz - - - - Yes N - -
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N Plug to N Socket 0.8 dB, 20 dB - 50Ω 12.4GHz - - - - Yes N - -
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N Plug to N Socket 20dB - 50Ω 10GHz - - - - - N - -
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FabrikantCinch Connectors
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BNC Plug to BNC Socket 20dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket
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BNC Plug to BNC Socket 6dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket
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TNC Plug to TNC Socket 3dB Straight 50Ω 3GHz - - Gold Brass - TNC Female Male
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N Plug to N Socket 0.5 dB, 6 dB - 50Ω 12.4GHz - - - - Yes N - -
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