Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Reexamination Certificate
2007-04-17
2007-04-17
Nguyen, Duc M. (Department: 2617)
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
C455S562100, C455S575700, C379S406070
Reexamination Certificate
active
10399679
ABSTRACT:
A radio equipment, wherein an attenuator (10) is inserted between antennas (91, 92) and a radio module (2), and output and input sensitivities are raised and lowered simultaneously so as to keep the balance of a radio covering range with an input receiver coverage at a constant, and the antenna (91) and the antenna (92) with attenuator are switched over by a switch (8) to increase and decrease the radio coverage range and input receiver coverage while keeping the balance of the dynamic radio coverage range with the input receiver coverage.
REFERENCES:
patent: 5361074 (1994-11-01), Hansen
patent: 6035183 (2000-03-01), Todd et al.
patent: 6415141 (2002-07-01), Kakura et al.
patent: 6535748 (2003-03-01), Vuorio et al.
patent: 2002/0028674 (2002-03-01), Slettengren et al.
patent: 10-336068 (1998-12-01), None
Hara Tsutomu
Inagaki Yukihide
Takita Isao
Umemura Masaya
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Nguyen Duc M.
Thier Michael
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