Bi-directional Coupler Relay Switching for HFC Network Reconfiguration
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Solution Overview
Problem
Conventional bi-directional couplers in HFC networks are unidirectional, requiring costly replacements or time-consuming re-cabling when network redesigns necessitate reversing signal directionality.
Innovation Solution
A bi-directional coupler assembly with a relay system and directional couplers that can be switched between two states, allowing the input forward path RF signal to be connected to either the line input or output port, enabling operation in both standard and reverse configurations without physical re-directional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional unidirectional bi-directional couplers are used in HFC networks, then the device structure is simple and manufacturing is easy, but the device cannot adapt to network redesigns requiring directionality reversal, necessitating costly replacements and time-consuming re-cabling
Solution Approach 1:
The patent applies the dynamics principle by making the coupler's signal path configurable rather than fixed. Relays are used to dynamically switch between forward and reverse directionality modes, allowing the device to adapt its internal connection topology based on operational requirements. This enables a single coupler to replace what would traditionally require two different directional couplers.
Solution Approach 2:
The patent implements universality by designing a bi-directional coupler that can function in both forward and reverse directions through the incorporation of relays and directional couplers. This multi-functional design allows one device to perform the work of multiple conventional unidirectional couplers, enhancing adaptability to different network configurations without requiring physical replacement of the device.
2Adaptability or versatility
If conventional unidirectional couplers are used and network redesign requires directionality reversal, then re-cabling and replacement must be performed, but this increases both time consumption and installation costs
Solution Approach 1:
The dynamic switching capability enabled by relays allows the coupler to be reconfigured electronically rather than physically. When network redesign requires directionality reversal, the relays can be switched to change the signal path orientation without requiring technicians to re-cable or replace the device, significantly reducing installation time and labor costs.
3Adaptability or versatility
If relays and switching mechanisms are added to enable bi-directional operation, then directionality adaptability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The coupler is segmented into distinct functional modules: directional couplers for signal distribution, relays for switching, and control logic for coordination. This modular segmentation allows each component to be manufactured and tested independently, then assembled into the complete bi-directional device, making the manufacturing process more manageable despite the increased complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy reversal of signal directionality without re-cabling or replacing faceplates, reducing costs and time in network redesigns while maintaining signal integrity.
Implementation Method 1
At least one relay is connected between the first port and the second port, the relay being configured to be operated in either a first state or a second state
Data Source
AI summary
A bi-directional coupler assembly includes a first port for connecting to one of an input forward path RF signal line and an output forward path RF signal line. A second port connects to the other of the input forward path RF signal line and the output forward path RF signal line. A relay is connected between the ports and to at least one directional coupler. In a first state of the relay, an input forward path RF signal delivered from the input forward path RF signal line and through the first port is directed through the at least one directional coupler in a first direction. In a second state of the relay, an input forward path RF signal delivered from the input forward path RF signal line and through the second port is directed through the at least one directional coupler in said first direction.