PoE Range Extender with Magnetic Transformers for Signal Integrity
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Solution Overview
Problem
Conventional range extender devices for LANs using female-to-female RJ-45 connectors are limited to 100 meters in 1000BASE-T Ethernet networks, leading to signal degradation and require external power sources, restricting their placement.
Innovation Solution
A range extender device with a physical interface transceiver assembly that receives power and data signals via a Cat5 cable, using magnetic transformers to minimize voltage imbalances and enable PoE, allowing for active signal repetition and power distribution over extended distances without the need for external power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a female-to-female RJ-45 connector is used to extend Cat5 cable length beyond 100 meters, then the cable length is extended, but signal degradation occurs and reliable 1000BASE-T communication cannot be maintained
Solution Approach 1:
The patent introduces a range extender device as an intermediary component between the switch and the computerized device. This device includes a first Cat5 interface connected to the switch and a second Cat5 interface connected to the computerized device, with a repeater component in between that receives, regenerates, and retransmits signals. The repeater acts as a mediator that restores signal integrity at extended distances, solving the signal degradation problem while enabling cable lengths beyond 100 meters for 1000BASE-T communication.
2Reliability
If a conventional repeater device is used to extend cable length, then signal reliability is maintained beyond 100 meters, but external power sources are required which restrict device placement
Solution Approach 1:
The range extender device is designed to perform multiple functions: it acts as a repeater for signal regeneration, a power receiver for obtaining power over Ethernet (PoE) from upstream devices, and a power source for providing power to downstream devices. By integrating these functions into a single device, the system eliminates the need for separate external power sources, enabling flexible placement anywhere in the network within 100 meters of an upstream power source while maintaining signal reliability.
3Adaptability or versatility
If Power over Ethernet (PoE) is implemented to eliminate external power sources, then device placement flexibility is improved, but voltage imbalances and signal interference may occur
Solution Approach 1:
The patent separates the power transmission and data transmission functions into distinct components within the range extender device. Magnetic transformers are used to provide galvanic isolation between the power receiving circuitry and the data communication circuitry. This segmentation prevents voltage imbalances and electrical interference from affecting data signals, while still enabling PoE functionality for flexible device placement.
Solution Approach 2:
Magnetic transformers act as intermediaries between the PoE power input and the data communication interfaces. These transformers transfer power while providing electrical isolation, preventing voltage imbalances and ground loops from causing signal interference. The transformers mediate the interaction between power and data pathways, allowing both functions to coexist without harmful interactions.
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 reliable 1000BASE-T Ethernet transmission beyond 100 meters with minimal signal loss and allows the range extender device to be placed anywhere in the network, independent of power source proximity, while providing power to downstream devices.
Implementation Method 1
The first magnetic transformers are configured to minimize voltage imbalances between two wires forming a twisted-pair of the first Cat5 cable to enable PoE
Implementation Method 2
The first magnetic transformers are configured to minimize voltage imbalances between two wires forming a twisted-pair of the first Cat5 cable to enable PoE, and to isolate the data signals from the power signals
Implementation Method 3
The first PHY is configured to, using the power signal, receive a first data signal from the PSE through the first interface assembly
Data Source
AI summary
An apparatus includes a PHY assembly in electrical communication with a first interface assembly and with a second interface assembly, the PHY assembly configured to receive a power signal from a PSE, the PHY assembly having a first PHY and a second PHY. The first PHY is configured to receive a first data signal from the PSE through the first interface assembly via the frame-based computer networking connection and provide the first data signal to the second PHY for transmission to a network device through the second interface assembly via the frame-based computer networking connection. The second PHY is configured to receive a second data signal from the network device through the second interface assembly via the frame-based computer networking connection and provide the second data signal to the first PHY for transmission to the PSE through the first interface assembly via the frame-based computer networking connection.