Abstract

Microwaves are distinctive—physically by their concern with waves whose wavelengths are comparable with dimension of the components—and by their applications, mainly to radar and to communications. Component design and analysis at microwaves often follows from the above first property, that it operates around the resonance region, which sits between the optical region and the low-frequency region (to use the language of scattering). But it is equally true in optoelectronics that relevant physical dimensions are comparable with the operating wavelength. So, as much of communications has shifted from the microwave to the optical region, it is natural than many, although not all, microwave techniques will follow this upward shift of frequency.

© 1991 Optical Society of America