PRODUCTS / COMPONENTS / GAIN EQUALIZER SOLUTIONS
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35 GHz Negative Slope Equalizers
Broadband Amplitude Equalization - Precision, Stability, and Durability from 3 GHz to 35 GHz.
Spectrum Control’s EQ3009 series provides passive cable loss compensation from 3 to 35 GHz. Its negative slope response applies more attenuation at lower frequencies and less at higher frequencies, helping offset losses that increase across a microwave signal path. The result is a flatter combined response and more consistent signal levels in communications, radar, aerospace, and RF test applications.
Available with 10 dB or 15 dB delta slopes, the EQ3009 series lets designers select the level of correction that best matches their measured response. Each compact, bidirectional unit features 2.9 mm male and female connectors, a maximum insertion loss of 2.0 dB at 35 GHz, and an operating temperature range of -54°C to +125°C.

How it Works
Cable loss generally increases as frequency rises. The EQ3009 applies more attenuation at lower frequencies and less at higher frequencies. When paired with a cable or signal path that has the opposite response, it helps flatten the combined response across the operating band.
Why it Matters
Frequency-dependent loss can leave high-frequency signals weaker than lower-frequency signals. The EQ3009 provides a passive way to reduce that difference, helping preserve amplitude consistency without external power or an active gain stage.
Understanding the Response
- Cable Loss: Attenuation rises with frequency, reducing signal levels toward the high end of the band.
- Negative Slope Equalizer: Attenuation decreases with frequency to counter that loss.
- Delta slope: The EQ3009 offers 10 dB and 15 dB options, measured relative to its insertion loss at 35 GHz.
- Equalized Response: Combining the two opposing responses helps flatten the overall signal level.
Typical Slope for EQ3009

EQ3009 at a Glance
3 to 35 GHz frequency range
10 dB and 15 dB delta slope options
2.0 dB max. insertion loss at 35 GHz
1 W max. input/output power at +25°C
Compact, bidirectional 2.9 mm package
Typical Applications
- Microwave communication links
- Radar and electronic warfare equipment
- RF and microwave testing
- Satellite communications and aerospace systems
- High-frequency cable runs
- Compensation for cable loss
- RF chain gain flattening
- Broadband signal correction
Why Choose Spectrum Control?
- Extends passive cable loss compensation to 35 GHz
- Offers 10 dB and 15 dB slope choices
- Helps flatten frequency-dependent system response
- Provides low insertion loss at 35 GHz
- Supports operation from -54°C to +125°C
- Fits into signal paths with compact 2.9 mm connectors
- Allows bidirectional installation
- Offers epoxy-sealed connectors as an option
Need a Custom Equalizer?
Tell us about your equalizer requirements, and our team will help identify the right solution.