Attenuators

ATTENUATORS PRODUCTS

JFW’s 50R-137 is a variable attenuator that operates from DC to 2.55 GHz for commercial, military, and space applications.

JFW offers the 50PA-1068 modular attenuator assembly designed to be connected to up to a maximum of 8 RF modules and operate within the 200 to 6000 MHz frequency range. The RF modules contain individually controlled programmable attenuators with attenuation range 0-95 dB x 1 dB steps. 

The CMD325 from Custom MMIC is a negative controlled, wideband GaAs MMIC 6-bit digital attenuator die designed to operate from the DC to 30 GHz frequency range. Each bit of the attenuator is controlled by a single voltage of either 0 V or –5 V. It features a low insertion loss of 4 dB at 12 GHz and the attenuation accuracy is typically 0.2 dB step error.

JFW’s 50BA-034-127 is a mini benchtop programmable attenuator assembly designed for mm-wave testing in the 30 – 3000 MHz frequency range. It is configured with one solid-state programmable attenuator, and it features an attenuation range of 0 to 127 dB in 1 dB increments and 50 Ohms nominal impedance.

JFW’s Model 50BA-043-63 is a 50 Ohm benchtop attenuator assembly containing two solid-state step attenuators. These attenuators feature attenuation range of 0 to 127 dB by 1 dB steps and operate within the 100 MHz to 18 GHz frequency range.

JFW’s Model 75PA-113-XX is a 19-inch rack mount attenuator system with 1 to 16 75 Ohm solid-state step attenuators. Featuring an attenuation range of 0 to 95 dB by 1 dB increments and 75 Ohms nominal impedance, the system is perfect for DOCSIS and CATV automated RF testing applications in the 5 - 150 MHz range.

JFW offers the 75P-223 solid state programmable attenuator for applications operating over the 5 to 2150 MHz range with 0 to 63.75 dB attenuation by 0.25 dB steps.

The 50PA-1174-XX series is composed of 19 inch rack mount attenuator assembles containing 50 Ohm solid-state step attenuators. The number of attenuators can be selected from 1 to 8 attenuators. The attenuators have an attenuation range of 0 to 63 dB by 0.5 dB steps and operate at 200 MHz to 8 GHz. 

ABOUT

Attenuators

Attenuators are the exact opposite of an amplifier. It is used to reduce the intensity of either electricity or sound. For example the digital impulse that is used to drive a speaker may be stepped down to prevent the lower range speakers from failing. An equalizer in music is a form of amplifier and attenuator rolled up into one. It however targets on particular frequency. Every instrument in a musical symphony and even the human voice occupy a certain frequency range. Each not of a violin for example has a very specific frequency. The A string on a violin is exactly 440Hz. Using an attenuator, one can target the exact frequency of 440Hz and reduce its intensity. It can even be attenuated all the way down to zero. If this were to happen then every time an A not of a violin was played, it would not be heard.

This sort of technology is used to clean up sounds of recordings and other sounds in a recording. It is even possible to pin point the frequency range of the human voice then use an attenuator to reduce it to zero. Imagine if one were to take a recording of a song and attenuate just the vocal portion, the song will now resemble a minus one track.

Attenuators have other more sophisticated commercial uses. The can be used to reduce the electrical impulses that were amplified to travel long distances and may still carry strong energy when it arrives, so it needs to be attenuated before it is channeled for processing.