Multiplex communications – Duplex – Communication over free space
Patent
1995-06-30
1997-09-23
Safourek, Benedict V.
Multiplex communications
Duplex
Communication over free space
455301, H04B 110, H04B 126
Patent
active
056712200
ABSTRACT:
A satellite channel interface (SCI) is constituted by an analog section having a multiplexer unit and a down converter unit, and a digital section constituted by a modulator-demodulator unit. The satellite channel interface has a single printed circuit board on which all of the above units are formed. A rectangular member surrounds the analog section, and a shield cover shields an opening portion of the rectangular member. The single printed circuit board is a multi-layered board constituted by at least three conductive layers, of which the bottom two layers are grounding electrodes. The SCI does not require the terminals and cables which are otherwise necessary, can be made compact, and can be manufactured with the reduced number of processing steps.
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NEC Corporation
Nguyen Chau T.
Safourek Benedict V.
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