Amplifier for Particle Accelerators

HBH develops and fabricates custom designed power amplifiers for particle accelerators.
A modular concept facilitates fast installation and easy maintenance. A smart monitoring and control system ensures reliable operation.
The amplifiers can be provided in a frequency range from 80MHz to 3GHz and in a power range from 80kW CW to 500kW pulse operation.

Supplier Appreciation Award (FRIB)


Supplier Appreciation Award (FRIB)

In June 2019 HBH was recognized by the Facility for Rare Isotope Beams (FRIB) with the Supplier Appreciation Award shown above. This award recognizes HBH’s successful multi-year effort to design, develop and deliver 250 highly specialized Solid State Amplifiers for use in FRIB’s particle accelerator at Michigan State University, USA.

Main Design Features

  • High Efficiency:
    • Drain Voltage can be set via Ethernet
      Interface during operation
    • Modulated Power Supply
  • Open- and short-circuit protected
  • 1GBit/s Ethernet Interface for
    remote control and monitoring
  • Water cooled system
8kW amplifier system, cw

Smart monitoring of amplifier parameters

The following parameters are continuously monitored- limits/threshold can be set as necessary

  • Output power
  • Output VSWR
  • Temperature of each transistor
  • Temperature of each load resistordedicated to circulator
  • Power at each load resistor
  • Output power of each amplifier pallet
  • VSWR between each amplifier pallet and circulator
  • Drain current and drain voltage of each transistor
  • Water flow rate

HBH fabricated 250 x 8kW amplifiers for Michigan State University, FRIB

Courtesy of FRIB


20kW Amplifier for FPC Conditioning, 322MHz

Measured output power of the 20kW amplifier

Highly sophisticated circulator tracking at 80.5 MHz

  • The input return loss of the amplifier must be >15dB to ensure a safe operation of the amplifier pallet.
  • This necessary input return loss is achieved by an additonal coil within the circulator and controling the current of the coil.
  • The input return loss is a function of the power level, reflection factor in magnitude and phase as well as a function of the temperature.
Goal of the tracking algorithm is to stay in the valley Goal is also to avoid false minimums

Pulse Amplifiers


Freuency / GHz

Power / W

Pulse Length / µs

Duty Cycle / %

HA1009 1.2 - 1.4 100 1 - 2000 20
HA3011 3.4 - 3.8 25 0.07 - 50 10
HA3012 2.8 - 3.2 100 50 20
HA3017 2.8 - 3.1 50 0.5 - 4 2
HA6047 9.0 - 10.0 300 0.07 - 100 10
HA8090 33.0 - 35.0 15 0.070 - 100 10

L-Band amplifiers

1200 – 1400 MHz, 100W, 1000W,

S-Band amplifiers

2.8 – 3.2 GHz, 50W

Amplifiers for medical application

35 GHz, 3W, 50ns 

Amplifiers for medical application

33 – 35 GHz, 10W, 100µs


Continuous Wave Amplifiers

Amplifiers for airborn systems

15 GHz, 20 W

Broadband amplifiers

30 – 600 MHz, power:  100W

50 – 500 MHz, power:  350W


Microwave Generator for Heating, Drying and Plasma Applications

500W module with coaxial output connector

500W module with coaxial output connector

1kW module with waveguide launcher WR340

1kW module with waveguide launcher WR340

Main features

  • Output power 1kW
  • Frequency setting from 2.4 to 2.5 GHz
  • Frequency sweep from 2.4 to 2.5 GHz
  • Efficiency >50%
  • Phase adjustment
  • Amplitude adjustment
  • Short pulses from 50ns up to CW
  • Synchronization with an external frequency source for use in an array of generators
  • Water cooled
  • Combining of 1kW modules up to 10kW and more