50 Ohm Fixed Attenuators
(0.5 to 2 Watts)

The name JFW has been synonymous with 50 Ohm fixed attenuators since our inception in 1979.  JFW has the capabilities to match custom dB values with a variety of RF connector combinations to make a fixed attenuator for your specific application.

An attenuator is used to decrease the power level of a RF signal. A fixed attenuator is an attenuator that has a single fixed dB value.  When purchasing a fixed attenuator you have to specify which dB value you require.  Here are two selections charts to help determine which dB value you need.

• Selection chart for decreasing power level
• Selection chart for reducing VSWR

Please contact JFW for recommendations or use our Inquiry Form.

JFW Model #	Impedance	Frequency Range	RF Input Power	Attenuation Values	RF Connectors
50F-XXX	50 Ohm	DC-2.2 GHz	1 Watt	1-30 dB	BNC, N, SMA, TNC
50FP-XXX-H2	50 Ohm	DC-2 GHz	2 Watt	1-65 dB	BNC, N, RP-TNC, SMA, TNC, 7/16, 4.3/10.0
50FP-XXX-H3	50 Ohm	DC-3 GHz	2 Watt	1-30 dB	BNC, N, SMA, TNC, 7/16, 4.3/10.0
50FP-XXX-H4	50 Ohm	DC-4 GHz	2 Watt	1-30 dB	BNC, N, SMA, TNC
50FP-XXX-H6	50 Ohm	DC-6 GHz	2 Watt	1-20 dB	N, SMA, TNC, 4.3/10.0
50HFFB-XXX-2/40	50 Ohm	DC-40 GHz	2 Watt	0-10, 15, 20, 30 dB	2.92mm
50HFFA-XXX-2/18	50 Ohm	DC-18 GHz	2 Watt	0-30, 40, 50, 60 dB	N, SMA or TNC
50HFFA-XXX-2/6	50 Ohm	DC-6 GHz	2 Watt	0-30, 40, 50, 60 dB	N or SMA
50HFFA-XXX-2/8	50 Ohm	DC-8.4 GHz	2 Watt	0-30, 40, 50, 60 dB	N or SMA
50HFFA-XXX-2/26	50 Ohm	DC-26.5 GHz	2 Watt	1-10, 20, 30 dB	SMA

DC Passing Attenuators

DC passing attenuators will pass the DC signal through the attenuator without being attenuated.  They only attenuate over the specified frequency band.

JFW Model #	Impedance	Frequency Start	Frequency Stop	RF Input Power	Attenuation Values	RF Connectors
50FFD-XXX	50 Ohm	600 MHz	1950 MHz	+21 dBm DC passing	1-30 dB	BNC, N, SMA, TNC
50FFP-XXX	50 Ohm	400 MHz	2500 MHz	+21 dBm DC passing	1-10 dB	BNC, N, SMA, TNC
50FFW-XXX	50 Ohm	950 MHz	2150 MHz	+21 dBm DC passing	1-25 dB	BNC, N, SMA, TNC