Although UWB communication system makes use of huge frequency bands, the permitted power spectral density of the UWB signal is rather limited to avoid interference with other systems, such as the frequency band from 4400 to 4990 MHz, which is adopted in large capacity microwave relay
At present, commercial microwave links in cellular communication networks, electric power communication, maritime telecommunication, and microwave relay
communication system have widely covered the urban and rural areas; on the basis of above equipment, there is no need to construct additional hardware; there is only a need to establish a network for signal acquisition from the existing microwave link devices; the economic cost is relatively low; therefore it has a unique advantage in the financial and engineering aspects.
Cogent Technologies, a UK-based suppliers of microwave, satellite and cellular transmission solution, worked with TVC exclusively to provide all RF uplink equipment and microwave relay
equipment for the two vehicles.
Built by Bell Telephone Laboratories, Telstar is essentially a broad-band microwave relay
station whose great altitude enables it to transmit over very long distances, whereas its earthbound counterparts are limited by the curvature of the globe.
Army Signal Corps initiated projects to fortify and establish mountaintop microwave relay
radio sites to improve and expand backbone communications from the Demilitarized Zone in the north to United Nations Command and United States Forces Korea elements operating as far south as Chinhae and Busan.
That led me to examine subjects as diverse as reindeer hunters in Northamptonshire or horn-shaped aerials atop Cold War microwave relay
Illustrations include global TV microwave relay
networks to enhance national security in the early 1950s, and development of the Telstar satellite in 1962.
The cable also is connected to the city's microwave relay
A microwave relay
between the two craft will enable scientists to measure the distance between the satellites within a few millionths of a meter--about the width of a red blood cell or a particle of smoke.
It will expand the network's range to regional cities and areas far from metropolises by setting up microwave relay
stations that use Japanese equipment.
Giant cell towers and microwave relay
stations dot most of the mesas in New Mexico, blinking warnings to the military planes, but calls still drop every few miles, or there's no signal at all such as in most places within the Navaho Nation.