O'Reilly logo

Consumer Electronics by S. P. Bali

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

MICROWAVES

A microwave is a signal that has a wavelength of one foot (30.5 cm) or less. This converts to a frequency of 984 MHz, so all frequencies above 1000 MHz (1 GHz) are considered microwaves. The frequencies immediately below this border are considered ultra-high frequencies. The upper end of the microwave range contains the light frequencies, about 1015 Hz. However, because electronic transmission is so closely geared to half-wavelength devices, the practical upper limit is about 300 GHz, where one wavelength is about 0.04 inch (0.1 cm). Smaller devices are being made, but their power handling abilities are also micro.

Normally microwaves spread outwards as they travel through the atmosphere and disappear without effect. The microwave ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required