Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-03-12
1999-11-30
Trost, William G.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455347, 343890, 343872, H04B 700
Patent
active
059958510
ABSTRACT:
This invention relates to a receiver system in a base station which receives signals of such a mobile communication as an Analogy Cellular, a Digital Cellular, a Code Division Multiple Access (CDMA) Cellular, a Personal Communication Service (PCS), a Trunked Radio System (TRS), a Dual Paging, and a Wireless Local Loop (WLL).
when the receiver system of the mobile communication base station is established outdoors, by establishing a thermal electric module with small volume, light weight, high reliability, and excellent durability in a bandpass filter (or duplex filter), a low noise amplifier, or a low-converter to be maintained at a constant temperature without a need of a refrigerant and such a mechanical driving portion as a condenser fan and employing a control circuit for controlling the thermal electric module within a proper temperature range, the outdoor receiver system can be operated in a constant temperature range so that the deterioration of characteristics caused by the change of temperature of the receiver system under a poor outdoor environment can be protected.
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Trinh Sonny
Trost William G.
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