Microwave -- Facts, Info, and Encyclopedia article(Site not responding. Last check: 2007-10-26)
This page is about the (Energy that is radiated or transmitted in the form of rays or waves or particles) radiation; for the appliance, see (Kitchen appliance that cooks food by passing an electromagnetic wave through it; heat is produced by the absorption of microwave energy by the water molecules in the food) microwave oven.
Microwaves, also known as super-high frequency (SHF) signals, have wavelengths approximately in the range of (additional info and facts about 30 cm) 30 cm (frequency = 1 GHz) to (additional info and facts about 1 mm) 1 mm (300 GHz).
Television [encyclopedia](Site not responding. Last check: 2007-10-26)
For terrestrial broadcasting the complete vision signal modulates a radio wave in one of the ultra-high-frequency (UHF) bands between 470 and 890 mHz as a carrier, while the corresponding sound (audio) signal has its own carrier at a slightly higher frequency.
High-definition TV systems with more than 1000 scanning lines will be transmitted via satellite using the super-high-frequency (SHF) band, 11.7 to 12.5 gHz.
Television is a telecommunication system for broadcasting and receiving moving pictures and sound over a distance.
Microwave radiation is non-ionizing, which means that it does not create ions (electrically-charged atoms and molecules) by knocking electrons out of their orbits in atoms and molecules subjected to radiation.
international: microwaveradio relay and SHF radiotelephone links to Martinique and Guadeloupe; VHF and UHF radiotelephone links to Saint Lucia
international: new SHF radiotelephone links to Trinidad and Tobago and Saint Vincent; VHF and UHFradio links to Trinidad
international: VHF/UHF radiotelephone from Saint Vincent to Barbados; new SHF radiotelephone to Grenada and to Saint Lucia; access to Intelsat earth station in Martinique through Saint Lucia
