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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Description Price Interface Type Attenuation Body Orientation Impedance Operating Frequency Body Plating Cable Type Contact Plating Contact Material Low Power Connector Type Gender A Gender B
RS Stock No. 886-0241
Mfr. Part No.6-12FFPB
PHP329.772
Each (In a Pack of 6)
units
F Plug to F Socket - Straight 75Ω - - - - - - F Plug Plug
RS Stock No. 886-3256
Mfr. Part No.FLN3G
PHP92.906
Each (In a Pack of 10)
units
F Plug to F Socket - Straight - 1GHz - - Nickel - - F Plug Socket
RS Stock No. 885-7517
Mfr. Part No.ATT-0218-20-NNN-02
PHP6,086.00
Each
units
N Plug to N Socket 20dB Straight 50Ω 12.4GHz - - - - Yes N Plug Socket
RS Stock No. 885-8006
Mfr. Part No.27-9300-3
PHP314.25
Each
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BNC Plug to BNC Socket 3dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket
RS Stock No. 886-0566
Mfr. Part No.27-9300-6
PHP315.18
Each
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BNC Plug to BNC Socket 6dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket
RS Stock No. 886-0560
Mfr. Part No.27-9300-10
PHP314.809
Each (In a Pack of 10)
units
BNC Plug to BNC Socket 10dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket
RS Stock No. 885-8416
Mfr. Part No.27-9300-20
PHP314.25
Each
units
BNC Plug to BNC Socket 20dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket