- published: 17 Oct 2015
- views: 10212685
Microwaves are radio waves with wavelengths ranging from as long as one meter to as short as one millimetre, or equivalently, with frequencies between 300 MHz (0.3 GHz) and 300 GHz. This broad definition includes both UHF and EHF (millimeter waves), and various sources use different boundaries. In all cases, microwave includes the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum, with RF engineering often putting the lower boundary at 1 GHz (30 cm), and the upper around 100 GHz (3 mm).
Apparatus and techniques may be described qualitatively as "microwave" when the wavelengths of signals are roughly the same as the dimensions of the equipment, so that lumped-element circuit theory is inaccurate. As a consequence, practical microwave technique tends to move away from the discrete resistors, capacitors, and inductors used with lower-frequency radio waves. Instead, distributed circuit elements and transmission-line theory are more useful methods for design and analysis. Open-wire and coaxial transmission lines give way to waveguides and stripline, and lumped-element tuned circuits are replaced by cavity resonators or resonant lines. Effects of reflection, polarization, scattering, diffraction, and atmospheric absorption usually associated with visible light are of practical significance in the study of microwave propagation. The same equations of electromagnetic theory apply at all frequencies.
Actors: Kath Soucie (actress), Stephen Tobolowsky (actor), Farrah Fawcett (actress), Thurl Ravenscroft (actor), Wayne Knight (actor), Russi Taylor (actress), Carol Channing (actress), Brian Doyle-Murray (actor), James Murray (actor), James Murray (actor), DeForest Kelley (actor), Jim Cummings (actor), Alan King (actor), Donald Kushner (producer), Willard Carroll (producer),
Genres: Adventure, Animation, Family, Sci-Fi,You said you would be out for a while
Now it's been a year
You should be back home
Microwave and meals for one
The more that I sleep
The more I get tired
It's time to wake up
It's time to wake up
I owe it all to you
I owe it all to you
Secrets taste
Like the last time we kissed,
Or was it the last time
You asked me to quit.
Children build
The snow-man in the garden,
As the radio
Plays your favorite song.
It's time to wake up
It's time to wake up.
I owe it all to you
I owe it all to you
I owe it all to you