Practical Spectral Sources and Detectors for Analytical Spectrometry

Practical Spectral Sources and Detectors for Analytical Spectrometry 

Neither the practising analytical scientist nor indeed many analytical instrument makers would willingly embark upon ab initio design and construction of MMW oscillators or detectors. It is much more likely they would purchase the oscillator modules available from the specialist MMW component suppliers. This section aims to help the reader make an informed decision on the suitability of a device for the experiment being planned. 

The most commonly encountered MMW sources are now the Gunn and Impatt devices although the Backward Wave Oscillator (BWO) is still used for wideband spectroscopic studies. The Gunn and Impatt devices exhibit the property of negative resistance that makes them well suited as MMW oscillators. 

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