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Barth High Voltage Attenuators

High Voltage Attenuators

PPM Power supply world-class, high voltage attenuators designed and manufactured by Barth Electronics in the USA. Barth have been designing and manufacturing sub-nanosecond, high energy, pulse power coaxial components for over 50 years. These are matched-impedance coaxial attenuators primarily for use in pulsed 50 ohm systems or where occasional transients would damage ordinary units. The attenuator design closely matches the impedance around each resistor.

These attenuators feature an input impedance very close to 50 ohms with characteristics as good or better than most microwave attenuators. The units are ideal for use in nuclear and  high energy experiments. Extensive testing during manufacturing ensures very high reliability for single shot experiments. A voltage coefficient of the resistive film of <0.0001 %/V allows low voltage calibration of most systems.

Connector types available

SMA, TNC, BNC, N and SHV type connectors are available on many standard products.

Advantages over standard RF attenuators

  • Low reflection coefficient
  • Able to withstand high voltage pulses
  • Pulse power rated
  • Low voltage coefficient
  • High reliability
  • Input/output impedance held very close to nominal

Maximum input considerations

A unit that has been rated and tested to withstand 5 kV, 400 ns FWGHM rectangular pulses should be able to with stand 10kV, 75ns FWHM rectangular pulses. However, this is only a useful rule of thumb and higher voltages or pulse widths cannot be guarantees unless units are tested to a particular specification. Guaranteed pulse energy performance is available with a nominal additional cost for special testing at specified voltage and pulse width.

Impedance values

Standard units are  50 ohms impedance however 100 ohm impedance units are available. Additional attenuator types and impedances can be designed to customer specifications.

Typical Applications

• EMP Simulation
• EMP, ESD and Lightning Testing
• Impulse Radar
• High Power Microwave

Barth high voltage attenuators

Model No. Voltage Ratio Attenuation Max. input (pk) Max. input @pulse width Input reflection coeff. @100ps Risetime Effective Bandwidth DC Connectors
102-GP-20 10:01 20dB 2500V 400ns <2% <50ps 7GHz GR874 non-locking
102-GLP-20 10:01 20dB 2500V 400ns <2% <50ps 7GHz **
142-xxx-3 1.4:1 3dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-4 1.5:1 4dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-6 2:1 6dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-8 2.5:1 8dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-10B 3.2:1 10dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-14 5:1 14dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-20B 10:01 20dB 2500V 400ns <3% <10ps 30GHz **
142-xxx-26B 20:1 26dB 2500V 400ns <3% <10ps 30GHz **
202B-GLP-N 2.5:1 8dB 5000V 400ns <5% <20ps 17GHz GR874 locking
202A-GLP-T 5:1 14dB 5000V 400ns <5% <20ps 17GHz GR874 locking
202A-GLP-X 10:01 20dB 4000V 400ns <5% <20ps 17GHz GR874 locking
202B-NMFP-N 2.5:1 8dB 4000V 400ns <5% <20ps 17GHz N female/male
202-NMFP-T 5:1 14dB 4000V 400ns <5% <20ps 17GHz N female/male
202-NMFP-X 10:01 20dB 4000V 400ns <5% <20ps 17GHz N female/male
2237-HFNFP 20:1 26dB 10,000V 400ns <4% <50ps 7GHz HNB female input
2239-HFNFP 20:1 26dB 16,000V 400ns <4% <100ps 3.5GHz N female output
2536-HFP-3 1.4:1 3dB 7,000V (15,000) 400ns (75) <5% <30ps 10GHz HNB female*
2536-HFP-6 2:1 6dB 7,000V (15,000) 400ns (75) <5% <30ps 10GHz HNB female*
2536-HFP-10 3.2:1 10dB 7,000V (15,000) 400ns (75) <5% <30ps 10GHz HNB female*
2536-HFP-20 10:01 20dB 7,000V (15,000) 400ns (75) <5% <30ps 10GHz HNB female*

** Any male or female (GR, N, HNB, GHV) can be supplied

* Unit is supplied with a Barth Model 404-HMM low reflection HNB male to male adapter, so that either the input or output can be adapted to a male connection.

NOTE: Type HN (HNB) connectors are specially designed to obtain minimum reflection coefficient for fast risetimes.  For best pulse response, model 401-HNB male or 402-HNB female cable connector for RG213/214 coax should be used for interconnection.

Useful Documents


Barth-Model-2536 HV attenuator


Barth-Model-2511 HV attenuator


Barth HV attenuators-2237-2239












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Telephone +44 (0)1793 784389 or email: sales@ppm.co.uk