Incremental Technique for Absolute Measurement of Coherent Power at Millimeter and Submillimeter Wavelengths.

摘要

A technique for making absolute measurements of coherent rf power is described. The technique surmounts the primary shortcoming of the other existing techniques in that it permits absolute measurement of power at all radio frequencies, whereas the other techniques are inherently frequency limited, with the current upper limit being about 75 GHz. This major advantage stems from the fact that the technique utilizes a direct comparison of the unknown rf power with a primary standard, whereas all other techniques require a conversion of the power to heat before making the comparison. This technique permits absolute measurement of coherent rf power above about -10 dBm, with an accuracy of several tenths of a decibel. Its major usefulness is, of course, at millimeter and submillimeter wavelengths where no other reliable method for absolute measurement of rf power currently exists. In addition, it has the important advantages of relative simplicity and reliability. (Author)