• Broadband RF Power Mosfet Transistors
  • GaN Transistors
  • LDMOS Transistors
  • VDMOS Transistors



Polyfet has been shipping in volume High Power RF Mosfet Transistors employing both State of the Art LDMOS (Lateral) and VDMOS (Vertical) silicon gate technologies since 1988. Our products have long life time cycles of over fifteen years making them suitable for Military applications.  


A privately held company we have a proud history of providing excellence in service, delivering quality products on time and full technical support to assist customer engineers in selecting and designing our transistors into their amplifiers. For those who use software to design amplifiers a set of S parameters and Spice models can be downloaded.


For all your requirements please contact Castle Microwave Ltd:

+44 (0)1635 271300


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Castle Microwave is a Connexion Technologies Company.