Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Reexamination Certificate
2005-10-18
2005-10-18
Chin, Vivian (Department: 2682)
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
C455S078000, C455S079000, C455S082000, C455S084000, C455S115200, C455S226100, C455S090300, C455S560000, C455S561000
Reexamination Certificate
active
06957047
ABSTRACT:
A remotely mountable weatherproof bi-directional, half-duplex switching amplifier system is designed to provide maximum range for low power half-duplex radios such as Spread Spectrum radio transceivers. This invention automatically senses when to go into the transmitter amplification mode and puts all the transmit power right at the antenna. In the receive mode, it provides low noise pre amplification of received signals at the antenna thereby minimizing or even eliminating the effects of the coaxial transmission line from the radio transceiver to the remote location of the antenna. The invention is preferred to be in a waterproof enclosure adjacent to the antenna mounted to a pole and powered by a DC injector and excited by a transceiver, both pole and injector located remote from the mounting pole and also includes an improved electrostatic overvoltage protection device.
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Akimov Paul
Casaer John
Jones Hunter
Young Michael F.
Chin Vivian
Hohauser Herman J.
Pan Yuwen
YDI Wireless, Inc.
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