Abstract: A calorimetric calibration system includes a thermoelectric calibration heat pump device disposed between fluid supplying inlet and outlet pipes coupled to the waterload. The calibration heat pump device provides a controlled delta temperature to the fluid flowing through the pipes for providing a standard of reference for the calibration of calorimetric measurement systems relying on the conversion of RF or microwave energy to heat. The thermoelectric calibration heat pump device consumes a relatively low electrical power, is small in size, inexpensive to manufacture, and is safe to operate.

Abstract: A liquid cooled adjustable waveguide termination for use in high power applications is described. The liquid cooled adjustable termination includes a waveguide housing having a shorting plate disposed at an end portion of the housing and an electromagnetic energy absorbent element disposed within the waveguide. The absorbent element includes a hollow tube disposed within a bore of the element for providing the liquid coolant to an inner portion of the element. The termination further includes a flow header assembly for providing coolant to the absorbent element via the hollow tube and for directing the heated coolant out of the termination assembly, and an adjustable seal plate disposed between the flow header assembly and the shorting plate for adjusting the position of the electromagnetic energy absorbent element within the waveguide.