Microwave Source

Diode detector

Waveguide

Microwave Source

Diode detector

Waveguide

Some photons absorbed if resonant

HCCCCCNHCCCCCN

HCCCCCN

HCCCCCN

HCCCCCN

HCCCCCN

HCCCCCNHCCCCCN

HCCCCCN

HCCCCCN

Microwave Source

Diode detector

Waveguide

HCCCCCNHCCCCCN

HCCCCCN

HCCCCCN

HCCCCCN

HCCCCCN

HCCCCCNHCCCCCN

HCCCCCN

HCCCCCN

http://www.ged.chem.ed.ac.uk/structure/rotspec.html

http://ipc.iisc.ernet.in/~arunan/lab1.htm

http://ipc.iisc.ernet.in/~arunan/lab1.htm

http://www.decadecounter.com/vta/storearticleview.php?item=19

Varian reflex klystron: Electrons emitted from the heated cathode travel through the cavity grids toward the repeller plate and returned back through the grids. Self-sustaining oscillations develop, the frequency can be changed by adjusting the repeller voltage or changing the physical dimensions by squeezing the plates together

http://www.cybermike.net/reference/liec_book/Semi/SEMI_13.html

Microwave sweeper

Source BWO

Microwave diode detector

Waveguide gas sample cell

Microwave absorbed by rotational transitions

when resonant

HCCCCCNHCCCCCN

HCCCCCN

HCCCCCN

HCCCCCN

HCCCCCN

HCCCCCNHCCCCCN

HCCCCCN

HCCCCCN