Equalizers on Demand, by R. A. Wood Associates

"Equalizers on Demand" are wideband, low loss frequency Equalizers made to provide a positive gain slope from the lower frequency to the upper frequency. These Equalizers are designed to flatten out slope caused by long cables or other passive losses, or amplifier negative gain slopes. We have developed a wide series of Equalizers with various slopes covering the following frequency bands:

• 100 MHz to 1.0 GHz
• 350 MHz to 1.0 GHz
• 5 KHz to 2.0 GHz
• 50 MHz to 2.0 GHz
• 500 MHz to 2.0 GHz
• 1 GHz to 2.0 GHz
• 950 MHz to 2.15 GHz
• 10 MHz to 3.0 GHz
• 100 MHz to 3.0 GHz
• 100 MHz to 4.0 GHz
• 500 MHz to 4.0 GHz
• 1.0 GHz to 4.0 GHz
• 2.0 GHz to 4.0 GHz
• 2.0 GHz to 4.8 GHz
• 2.25 GHz to 5.25 GHz
• 4.8 GHz to 7.0 GHz
• 500 MHz to 8.0 GHz
• 1.0 GHz to 8.0 GHz
• 2.0 GHz to 8.0 GHz
• 4.0 GHz to 8.0 GHz
• 7.0 GHz to 11.5 GHz
• 2.0 GHz to 12.0 GHz
• 4.0 GHz to 12.0 GHz
• 6.0 GHz to 12.0 GHz
• 8.0 GHz to 12.0 GHz
• 4.5 GHz to 12.5 GHz
• 1.0 GHz to 15.0 GHz
• 8.0 GHz to 15.0 GHz
• 9.0 GHz to 15.0 GHz
• 100 MHz to 18.0 GHz
• 500 MHz to 18.0 GHz
• 1.0 GHz to 18.0 GHz
• 2.0 GHz to 18.0 GHz
• 4.0 GHz to 18.0 GHz
• 4.8 GHz to 18.0 GHz
• 8.0 GHz to 18.0 GHz
• 11.4 GHz to 18.0 GHz
• 12.0 GHz to 18.0 GHz
• 15.0 GHz to 18.0 GHz

New designs! We've now updated our catalog items below with high frequency equalizers, with low losses all the way up to 18 GHz. We also now have a smaller package design (M05 package). This package has a .030 inch lower profile, allowing it to be directly connected to lower profile RF components, such as RF amplifiers and couplers.

Equalizers are very important to help your system obtain the best dynamic range performance. You can use them to flatten out a negative gain slope to reduce gain tolerances/differences before going into high dynamic range amplifiers.

We're hoping this series of products create a new paradigm in RF performance. We can provide these very quickly to help correct slope in an RF path, "Equalizers on Demand" can trim RF path slopes almost as easily as attenuators can be used to adjust nominal gains.

Below is a list of parts we currenty have available. We are still adding to this list. If you don't see what you need, or would like us to quote an order, please contact us with the following information in a format of REQ-M05-Fxx.x-yy.y-Szz.z, where xx.x =Start frequency, yy.y. = Stop frequency , and zz.z = Full band slope.

The M05 Equalizer Package Outline Drawing is our standard package for all equalizers, and is the package we keep in stock for fast turn-around times.

The M01 Equalizer Package Outline Drawing is an optional package for equalizers up to 12 GHz. This package requires longer lead times.

The M02 Equalizer Package Outline Drawing is an optional package for equalizers up to 18 GHz. This package reqires longer lead times

The equalizers normally ship with SMA male (J1) and SMA female (J2) connectors. If you want SMA male connectors on each end, add -MM to the part number. If you want SMA female connectors on each end, add -FF to the part number.

Here is some additional information about our "Equalizers on Demand"

• An example of using an equalizer to "flatten out" an amplfier negative gain slope
• Amplifier Gain plot without equalization, showing ~5 dB neg slope)
• Amplifier Gain plot with 6 dB input equalization, designed to provide about 1 dB positive slope
• Another example of using an equalizer to "flatten out" our Extreme Bandwidth RF Amplfier negative gain slope from 5 KHz to 3 GHz
• Amplifier Gain plot without equalization, showing ~8 dB neg slope up to 3 GHz)
• Input equalizer showing ~8 dB positive slope up to 3 GHz)
• Resulting Amplifier Gain plot with 8 dB input equalization, designed to provide about 0 dB slope
• An example of the repeatibility of the equalizer designs. Data for two separate equalizers is shown below. They are pretty close!
• Part No. REQ-M02-F1.0-8.0-S12.0, SN001, 1.0-8.0 GHz, 12 dB Slope
• Part No. REQ-M02-F1.0-8.0-S12.0, SN002, 1.0-8.0 GHz, 12 dB Slope
• There are some tradeoffs that can be made between linearity and insertion loss at the high end. If you need better linearity from the best fit straight line, you may have a little higher insertion loss at the high frequency. Some examples:
• Part No. REQ-M02-F0.5-8.0-S15.5, is a 15.5 dB Slope equalizer with 2.1 dB P-P linearity, and 1.5 dB max loss.
• Part No. REQ-M02-F0.5-8.0-S15.5-HL, is a 15.5 dB Slope equalizer with 1.5 dB P-P linearity, and 2.0 dB max loss.