Circuitry for use with coaxial cable distribution networks
First Claim
1. A circuit for use with a coaxial cable distribution network, contained in a housing having at least two ports,a first insulating plate mounting said circuit,said circuit including a first RF extent for connection to a first port and a second RF extent for connection to a second port,a gap between said extents,a coupler circuit having fist and second input terminals for connection to said first and second extents,said coupler first and second input terminals being reversible relative to said connection to said first and second extents.
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Accused Products
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.
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Citations
11 Claims
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1. A circuit for use with a coaxial cable distribution network, contained in a housing having at least two ports,
a first insulating plate mounting said circuit, said circuit including a first RF extent for connection to a first port and a second RF extent for connection to a second port, a gap between said extents, a coupler circuit having fist and second input terminals for connection to said first and second extents, said coupler first and second input terminals being reversible relative to said connection to said first and second extents.
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10. A circuit for use with a coaxial cable distribution network contained in a housing,
said housing having at least two ports for respective connection of the outer conductor of a coaxial cable to said housing, said circuit including an RF path between said ports, means defining a ground plane connected to said housing adjacent one port and connected to said housing adjacent said other port, said ground plane being arranged relative to said RF path to provide an approximation of the characteristic impedance therebetween.
Specification