Combining a general introduction to Gaussian beams and quasioptical
propagation with practical applications, Quasioptical Systems provides a
state-of-the-art treatment of the design of low-loss, broadband systems
at microwave to submillimeter wavelengths. The approach presented
involves utilizing a beam with a Gaussian distribution of field strength
perpendicular to its axis, which in turn propagates in a simple,
predictable fashion.