Emblation Microwave (Alloa, Scotland) offers the MSYS245 medical-grade microwave power generator, capable of more than 100 W CW output power at 2.45 GHz. It is suitable for a wide range of surgical applications, including soft tissue ablation, microwave hyperthermia therapy, diathermy, and microwave coagulation therapy. The compact microwave generator can replace much larger existing sources of microwave power such as magnetrons and traveling-wave tubes (TWTs), which also require separate power supplies. It measures 11.8" × 2.2" × 10.8" and weighs less than 10 pounds. It features a transistor oscillator feeding a fourstage amplifier based on gallium-nitride (GaN) transistors mounted on (SiC) substrates for thermal stability. The heat-pip-based cooling system transfers heat away from the amplifier’s active devices and maintains the enclosure at low operating temperatures even when running at full power. The MSYS245 employs pulse-width modulation (PWM) techniques to maintain power within 5% of a selected value over the full operating temperature range. The front-panel controls allow a user to enable or disable RF output power and to monitor status.

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    This article first appeared in the July, 2011 issue of Medical Design Briefs Magazine (Vol. 1 No. 6).

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