Seeking to use more of the radio spectrum: the scale extends beyond 90, but most users are crowded below 5

Article Abstract:

Government and industry researchers believe it is possible to use higher frequencies of the radio spectrum, which had been considered unusable. If this is true, it portends revolutionary changes in communications technologies. Until now, commercial services have operated below 5 GHz (five billion cycles per second), but the entire range between 5 and 90 GHz is being reconsidered. Advances in science and technology apparently might render much of that region available. In fact, some characteristics of waveforms at super-high frequencies might be especially useful for certain applications, such as personal communication networks. Motorola is said to be working with Centel Corp's Cellular Inc, developing a high-frequency wireless network that would connect with fiber-optic stations. Such a radio network could connect voice, video and data services with individual homes.

Radiotelephone communications, Research, Telecommunications services industry, Telecommunications industry, Wireless communications, Wireless LANs, Fiber optics, Telecommunication policy, Telecommunications policy, Personal communications services, Radio transmitters, Mobile communication systems, Radio Communication, Radio Frequency, Wireless Network, Cellular Inc., CELS

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Science fiction nears reality: pocket phone for global calls

Article Abstract:

Motorola Inc is announcing plans to build and operate a telephone system by 1996 that allows users of a 25-ounce handset to make and receive calls from anywhere in the world. The handset, which is 7.5 inches and has a 3.5 inch antenna, is expected to cost less than $3,500 and telephone calls will cost between $1 and $3 a minute. The plan calls for supplementing conventional radio antennas with a constellation of 77 satellites that would relay the calls. Motorola estimates the cost of putting the system in service by 1996 will be $2.3 billion and is seeking partners. The company has named the project Iridium, after the element iridium, which has 77 electrons orbiting the atomic nucleus.

COMMUNICATION, Communications Equipment, Innovations, Product development, Telecommunications equipment industry, Satellite communications, International communication, Telephones, International Communications

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