Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1998-10-30
2000-06-27
Bettendorf, Justin P.
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333109, H01P 112
Patent
active
060811692
ABSTRACT:
A conducting housing (to be closed by a lid) for a coaxial cable distribution network has a common port and one of an aerial or pedestal port. A motherboard carries an RF circuit and a transfer switch. In one setting of the transfer switch the RF circuit connects a coaxial pin at the common port with a coaxial pin at the pedestal port. In the other setting the common port pin is connected to the aerial port pin. When the aerial port is used on a rectangular housing, a transmission line forms part of the RF circuit between the motherboard and the aerial port. The transmission is preferably a central conductor spaced over most of its length by air from an outer conductor in the form of an inverted U enclosing the central conductor on three sides. Preferably a ground plane on the back of the motherboard connects to the transmission line outer conductor to provide a path entry in the housing at both ends for ground currents generated by signals in the RF path.
REFERENCES:
patent: 3716806 (1973-02-01), Zelenz
patent: 4963966 (1990-10-01), Harney et al.
patent: 5638035 (1997-06-01), Romerein et al.
Crowhurst David B.
Lynes Kenneth W.
Nepovim Zdenek J.
Romerein Robert L.
Bettendorf Justin P.
J.E. Thomas Specialties Limited
Westell Robert
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