Microwaves And Satellite Communication
Saturday, February 20th, 2010
Author: Kyle Newton
Micro is a unit for measurement of length. As the name suggests microwaves are the portion of the electromagnetic spectrum where the wavelength falls between about one millimeter and thirty centimeters that is micrometers.
Frequency of microwave bands extends from about one gigahertz to three hundred gigahertz and is useful for short range, high reliability radio and television links. Systems which use microwave frequencies are radar, mobile radio, satellite communications, terrestrial line of sight and troposphere links.
SATELLITE MULTIPLE ACCESS METHODS
Monday, December 21st, 2009For economic and technical reasons, a separate satellite or satellite transponder must be made available for each pair of earth terminals that require a communication link. In most communications systems, several terminals must use the same transponder. The transponder must be able to receive, translate, amplify, and transmit signals from several earth terminals through the satellite is referred to as multiple access. A military, or commercial communications channel can potentially be used by numerous earth terminals within its coverage area. Various multiple access control techniques have been developed to enable many earth terminals to share the capacity of a single satellite communications channel.
Communications Satellite
Friday, February 6th, 2009A communications satellite, commonly called as the comsat, is nothing but a satellite built artificially and placed in the place for telecommunications. They satellites function in different types of orbit like the low earth, molniya, geostationary and elliptical orbits.
Like the technology used in submarine communications, the satellite communications also uses relay technology that operates on microwave technology. The communication satellites are used for applications where the conventional technology like the cable is neither possible nor practical, like in TV and radio broadcasting, communications to moving vehicles etc. A satellite placed in the geostationary orbit looks to be fixed in a position to an observer from the earth. It revolves once per day above the equator at a constant speed.
Satellite Communications: Securing Voice, Data and Internet Solutions
Tuesday, January 6th, 2009Author: Kimberly Green
It’s not always feasible to establish voice, Data and/or Internet connectivity using landline and cable connections. Often, connection must be established in a very short time frame or it must be established hundreds of miles away from the closest wired connection.
With rapidly evolving technological advancements being brought to market on a daily basis it can be hard to keep up with the most current technology that can provide your needs with viable and cost effective solutions. In the past emergency operations and large scale operations on the outskirts of modern civilization have relied on crude methods of communications but with the advancement of technology there has been an explosion in-field demands to be able to communicate data in a consistent and efficient manner. In short; companies need to communicate and transfer data in real time.
Satellite Communications: Is it all that it is Cracked up to Be?
Saturday, November 15th, 2008Here are the Limitations That the Experts Don’t Want You to Know.
by Tymon Hytem