Radio frequency control circuit of base station of mobile commun

Details Radio frequency control circuit of base station of mobile commun Radio frequency control circuit of base station of mobile commun

1997-11-20

2000-05-30

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359167, H04B 1000

Patent

active

060697210

ABSTRACT:
The radio frequency control circuit of the base station of a mobile communications system is constructed in a manner that the transmitting coupler branching the transmission signal to the shadow region is connected between the transmitting side power amplifier and transmitting antenna, and the receiving coupler inserting the signal received from the shadow region is connected between the receiving side low noise amplifier and splitter, to cover the shadow region using a simplified circuit configuration without a separate hardware. Therefore, a signal is transmitted by the optical antenna to a shadow region located at a long distance through the optical cable, and the signal is transmitted by the dispersion antenna to a shadow region located at close range through the coaxial cable, to provide radiocommunication service to a mobile located in the shadow region without establishing a base station in the shadow region.

REFERENCES:
patent: 5457557 (1995-10-01), Zarem et al.
patent: 5493436 (1996-02-01), Karasawa et al.
patent: 5689355 (1997-11-01), Okubo et al.
patent: 5838474 (1998-11-01), Stilling

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