Remote access unit and radio-over-fiber network using same

Details Remote access unit and radio-over-fiber network using same Remote access unit and radio-over-fiber network using same

2006-12-01

2010-02-09

Curs, Nathan M (Department: 2613)

Optical communications

Hybrid communication system

C398S041000, C370S478000, C455S562100

Reexamination Certificate

active

07660531

ABSTRACT:
A remote access unit (RAU) apparatus, coupled to a central station (CS) of an RoF network through at least one optical fiber, and which RAU apparatus includes at least one antenna, includes: first and second antenna ports coupled to the at least one antenna; first and second optical fiber ports coupled to the at least one optical fiber; a first coupler for decoupling a first downstream signal of a first duplexing method and a second downstream signal of a second duplexing method, which are input through the first optical fiber port; a circulator for outputting the first downstream signal input from the first coupler to the first antenna port and outputting a first upstream signal of the first duplexing method input from the first antenna port to the second optical fiber port; and a second coupler for outputting the second downstream signal input from the first coupler to the second antenna port and outputting a second upstream signal of the second duplexing method input from the second antenna port to the second optical fiber port.

REFERENCES:
patent: 6937878 (2005-08-01), Kim et al.
patent: 7085497 (2006-08-01), Tiemann et al.
patent: 2003/0118280 (2003-06-01), Miyazaki et al.
patent: 2006/0079290 (2006-04-01), Seto et al.
patent: 2007/0147273 (2007-06-01), Lee et al.

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