RF Attenuator

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Attenuators are used in a wide variety of applications and can satisfy almost any requirement where a reduction in power is needed. Attenuators are used to extend the dynamic range of devices such as power meters and amplifiers, reduce signal levels to detectors, match circuits and are used daily in lab applications to aid in product design. Attenuators are also used to balance out transmission lines that otherwise would have unequal signal levels.

RF Attenuator Product Overview
Made in USA

Click on Connector to view fully tabulated electrical specifications
Connector Power Ratings
2 watt 611 Series Attenuator 605 Series Attenuators 10 watt Attenuator 20 watt N-Type Attenuators 50 watt N-Type Attenuator
2 watt 5 watt 10 watt 20 watt 50 watt 100 watt 150 watt
660 Series RF Attenuator 665 Attenuator Series 5 watt SMA Attenuators 10 watt 604 Attenuator Series 20 watt SMA Attenuator
2 watt 5 watt 10 watt 20 watt
QMA Attenuator
2 watt


RF Attenuator Schematic
    Attenuator Schematic
Max Input Power Level

MECA offers a wide selection of attenuators designed to exceed commercial specifications. Standard attenuation values of 3, 6, 10, 20 and 30 dB are available from STOCK! Need a special value? Many of our attenuators are available in all values from 0 - 40 dB in 1 dB increments. Custom models with different attenuation values, power ratings, frequency ranges, connector styles and configurations or plating are also readily available in quantity. With immediate access to our Applications Engineers, you can choose the best product solutions for your specific needs.

Specifying Tip:
For best results when selecting an RF attenuator for a given connector style, make sure to consider the amount of power being absorbed and the acceptable level of reflection (VSWR) that can be tolerated over the operating frequency range.

Input Power Attenuated
dB 1 2 3 4 5 6 7 8 9 10 20 30 40
% 20.57 36.90 49.88 60.19 68.38 74.88 80.05 84.15 87.41 90.00 99.00 99.90 99.99
Convenient Electrical Conversions
VSWR 1.05:1 1.10:1 1.15:1 1.20:1 1.25:1 1.30:1 1.35:1 1.40:1 1.50:1 2.00:1
Return Loss (-dB) 32.256 26.444 23.127 20.828 19.085 17.692 16.540 15.563 13.979 9.542
Voltage Reflection Coeff. 0.024 0.048 0.070 0.091 0.111 0.130 0.149 0.167 0.200 0.333
Match Efficiency (%) 99.94 99.97 99.51 99.17 98.77 98.30 97.78 97.22 96.00 88.89
Mismatch Loss (-dB) 0.003 0.010 0.021 0.036 0.054 0.075 0.097 0.122 0.177 0.512

Featured RF Attenuator

Variable Step Attenuator series
Variable Step Attenuator
MECA offers six models of variable step attenuators with average power ratings of 2 watts (1000 watts peak) available in 0-10 dB in 1 dB step.
Catalog Download
For your convenience, our full-line Signal Control Product Catalog is available in downloadable and hard-copy formats. Select one.