MoCA Entry Device Frequency Segmentation for Signal Isolation
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Solution Overview
Problem
Current MoCA entry devices are not optimized for specific frequency ranges, leading to reduced performance, increased cost, and complexity due to the need to accommodate both CATV and MoCA signals, which affects noise, power loss, and isolation.
Innovation Solution
The MoCA entry device employs low-band and high-band filters to separate CATV and MoCA signals, using optimized components in each path to minimize loss and reflections, thereby simplifying the device and reducing costs by optimizing the broadband and high-band paths for specific frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the entry device accommodates both CATV and MoCA signals using broad frequency range components, then the device can support both signal types, but the performance (noise, power loss, isolation) deteriorates and cost increases
Solution Approach 1:
The entry device is segmented into separate frequency path components: a first set of components handles CATV signals (5-1002 MHz) while a second set handles MoCA signals (1125-1675 MHz). This segmentation allows each component set to be optimized for its specific frequency range, improving signal quality while maintaining support for both signal types.
Solution Approach 2:
Different components are assigned different quality characteristics based on their operating frequency ranges. The first components are optimized for low-frequency CATV signals with characteristics suitable for 5-1002 MHz, while the second components are optimized for high-frequency MoCA signals with characteristics suitable for 1125-1675 MHz, achieving local optimization of signal quality.
2Device complexity
If the entry device uses components optimized for broad frequency ranges, then the device structure is simplified, but performance metrics (noise, power loss, reflections) worsen
Solution Approach 1:
The device is divided into two distinct signal paths with dedicated components for each frequency band. This segmentation increases component count but allows each component to be narrowly optimized, reducing power loss and reflections in each path compared to using broad-range components.
3Reliability
If the entry device uses components optimized for specific frequency ranges, then noise and reflections are reduced, but the device complexity and cost increase
Solution Approach 1:
Each component set is locally optimized for its specific frequency range with characteristics tailored to CATV or MoCA signal requirements. This local quality optimization improves signal quality by reducing noise and reflections, while the modular architecture manages the complexity increase.
4Device complexity
If the entry device accommodates both CATV and MoCA frequency bands with single-path components, then the device design is simpler, but signal isolation and degradation worsen
Solution Approach 1:
The signal path is segmented into separate component sets for CATV and MoCA frequencies. This segmentation prevents signal interference and degradation by ensuring that components handling one frequency band do not introduce harmful effects into the other band, achieving frequency-specific isolation.
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
This approach enhances the performance of the MoCA entry device by minimizing noise, power loss, and reflections, while reducing the number of ports and degradation of broadband signals, making it optimal for architectures with a single modem/gateway device capable of communicating across both CATV and MoCA frequency bands.
Implementation Method 1
a low-band filter connected to the entry port and configured to pass the cable television (CATV) signals therethrough and to prevent at least a portion of multimedia over coax alliance (MoCA) signals from passing therethrough
Implementation Method 2
a high-band filter connected to the low-band filter and configured to pass the MoCA signals therethrough and to prevent at least a portion of the CATV signals from passing therethrough
Data Source
AI summary
An entry device includes an entry port, a filter connected to the entry port, a plurality of first output ports, and a plurality of second output ports. A first path extends from the entry port, through the filter, to the first output ports. The first path is configured to pass cable television (CATV) signals therethrough and to prevent at least a portion of multimedia over coax alliance (MoCA) signals from passing therethrough. A second path extends from the entry port, through the filter, to the second output ports. The second path is configured to prevent at least a portion of the CATV signals and at least a portion of the MoCA signals from passing therethrough. A third path extends from the first output ports, through the filter, to the second output ports. The third path is configured to pass the MoCA signals therethrough and to prevent at least a portion of the CATV signals from passing therethrough.