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. 404-5338
Mfr. Part No.920-N732AC
BrandYuetsu
$109.59
Each
units
- 3dB Straight 50Ω 3GHz - - - Brass - BNC - -
RS Stock No. 494-799
Mfr. Part No.6830.19.A
$219.76
Each
units
SMA Plug to Socket 30dB - 50Ω DC → 18GHz - - - - Yes - - -
RS Stock No. 176-7264
Mfr. Part No.AT-130V
BrandHirose
$89.69
Each
units
- 30dB Straight 50Ω 18GHz - - Gold Beryllium Copper - SMA Male Female
RS Stock No. 886-0566
Mfr. Part No.27-9300-6
$13.63
Each
units
BNC Plug to BNC Socket 6dB Straight 50Ω 0 → 2GHz Nickel - Gold Brass - BNC Plug Socket
RS Stock No. 712-2930
Mfr. Part No.J01006A0022
$177.97
Each
units
BNC Plug to BNC Socket 3dB - 50Ω 6GHz - - - - - BNC - -
RS Stock No. 712-3107
Mfr. Part No.J01026A0008
$158.60
Each
units
N Plug to N Socket 14dB - 50Ω 1GHz - - - - - N - -
RS Stock No. 716-5075
Mfr. Part No.6630_SMA-50-1/199_NE
$169.00
Each
units
SMA Plug to Socket 30dB - 50Ω DC to 18GHz - - - - Yes SMA - -
RS Stock No. 716-5078
Mfr. Part No.6806.17.A
$216.35
Each
units
N Plug to N Socket 0.5 dB, 6 dB - 50Ω 12.4GHz - - - - Yes N - -
RS Stock No. 494-913
Mfr. Part No.6803.19.A
$241.36
Each
units
SMA Plug to Socket 3dB - 50Ω DC to 18GHz - - - - Yes SMA - -
RS Stock No. 712-3015
Mfr. Part No.J01016A0006
$169.20
Each
units
TNC Plug to TNC Socket 10dB - 50 Ω, 75 Ω 10GHz - - - - - TNC - -
RS Stock No. 716-5084
Mfr. Part No.6610_SMA-50-2/199_NE
$131.46
Each
units
SMA Plug to Socket 10dB - 50Ω DC to 6GHz - - - - Yes SMA - -
RS Stock No. 712-2949
Mfr. Part No.J01006A0023
$221.13
Each
units
BNC Plug to BNC Socket 6dB - 50Ω 6GHz - - - - - BNC - -
RS Stock No. 712-2946
Mfr. Part No.J01006A0025
$112.20
Each
units
BNC Plug to BNC Socket 20dB - 50Ω 6GHz - - - - - BNC - -
RS Stock No. 404-5344
Mfr. Part No.920-N732AF
BrandYuetsu
$60.95
Each
units
- 6dB Straight 50Ω 3GHz - - - Brass - BNC - -
RS Stock No. 716-5066
Mfr. Part No.6620_SMA-50-1/199_NE
$161.11
Each
units
SMA Plug to Socket 20dB - 50Ω DC to 18GHz - - - - Yes SMA - -
RS Stock No. 712-3116
Mfr. Part No.J01026A0009
$162.80
Each
units
N Plug to N Socket 20dB - 50Ω 1GHz - - - - - N - -
RS Stock No. 494-806
Mfr. Part No.6803.17.B
$449.92
Each
units
N Plug to N Socket 0.8 dB, 3 dB - 50Ω 18GHz - - - - Yes N - -
RS Stock No. 712-3129
Mfr. Part No.J01026A0020
$281.20
Each
units
N Plug to N Socket 10dB - 50Ω 10GHz - - - - - N - -
RS Stock No. 195-2996
Mfr. Part No.J01006A0835
$58.17
Each
units
BNC Plug to BNC Socket 6dB Straight 50Ω 0 → 1GHz - - - - - BNC Plug Socket
RS Stock No. 716-5101
Mfr. Part No.6820.17.B
$447.50
Each
units
N Plug to N Socket 1 dB, 20 dB - 50Ω 18GHz - - - - Yes N - -
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