5VAx – Series

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Type 5VAx family of structures are fabricated by ACST planar process on thinned s.i. GaAs substrate. Air-bridge interconnected mesas provide for a low parasitic capacitance and are fully passivated against harsh environment. The 5VAx structure represents three in series connected anodes, optimised for operation in varactor mode. The ACST Varactor Process provides nearly-ideal electrical characteristics, which allow for low losses (high efficiency) and high power-handling capability.

Application Areas:

  • High-power frequency multipliers
  • High-power up-convertors/mixers
  • High-frequency/high power current rectifiers

Product Features:

  • Extremely low reverse current
  • High breakdown voltage (close to theoretical limit)
  • Low shunt (pad-to-pad) capacitance
  • Suitable for flip-chip mounting approach
  • The structure is optimized for highly-reliable operation at MM-Waves

Available Configurations

Structure Type Nominal Parameters
Short Structure Description
Junction Capacitance Cj0 (fF/anode) Total Capacitance
Ctot (fF)
Series Resistance Rs/Differential Resistance Rdiff (Ω) Breakdown Voltage Ubd (V)
5VA30-13 30 12.5 15 41.4 Three varactors in series on 30 µm thick GaAs-substrate.
5VA40-13 40 14.5 14 41.4
5VA50-10 50 18 12 32.5
5VA70-13 70 23.5 12 41.4
5VA80-10 80 28.1 10 32.5

Diode parameters are usually determined for each batch individually and may vary within up to 20% from nominal values.

For large ordering quantities customer specifications can be considered. Do not hesitate to contact us

Please ask on availability before ordering.

ACST reserve the right to change the information presented here without notice.

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