Handheld medical devices including microwave amplifier unit at device handle

A system, comprising:

• a microwave signal generator;
• and
• a medical device, including:
• a handle assembly including a handle body defining a chamber therein and a first plurality of electrical contacts disposed thereon;
• and
• a probe-and-amplifier assembly, including:
• a probe extending distally from a distal end of the handle assembly;
• a microwave amplifier unit disposed within the chamber, wherein the microwave amplifier unit and the probe are mechanically coupled to one another to form a unitary body;
• and
• a second plurality of electrical contacts coupled to the microwave amplifier unit being selectively engageable with the first plurality of electrical contacts of the handle assembly,
• wherein the probe-and-amplifier assembly is selectively removable from the handle assembly.