Medium-frequency radio transmission system

Details Medium-frequency radio transmission system Medium-frequency radio transmission system

1996-01-16

1997-11-18

Urban, Edward F.

Telecommunications

Carrier wave repeater or relay system

With transmission line

455 551, 455 66, H04B 714

Patent

active

056898045

ABSTRACT:
A medium-frequency radio transmission system is formed by installing a receiving antenna for receiving an amplitude-modulated medium-frequency radio wave at the rooftop of an existing building, receiving the medium-frequency radio wave, coupling the received medium-frequency radio wave to an existing distributing cable or distributing conductive piping with or without a coupler for said radio wave, and transmitting the radio wave to a predetermined floor. At the predetermined floor the basement or tunnel of an existing building such as underground shopping mall, underground parking lot, underground railway, road tunnel or deep space of massive building is provided with a coupling such as an existing loop-like or linear wiring or piping line with or without coupler.

REFERENCES:
patent: 4457019 (1984-06-01), Szabo, Jr. et al.
patent: 4476574 (1984-10-01), Struven
patent: 4777652 (1988-10-01), Stolarcyk
patent: 4868887 (1989-09-01), Bertrand
patent: 4879755 (1989-11-01), Stolarczyk
patent: 5537637 (1996-07-01), Sugita et al.

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