Coaxial Cable Adapter for RRH Power and Data Multiplexing
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Solution Overview
Problem
Existing mobile radio systems face high conversion costs to modern RRH technology due to the need for additional cable installations, especially for power and data lines, which is costly and labor-intensive, especially with shorter cable lengths.
Innovation Solution
The method involves equipping a mobile radio station with adapters to connect a multi-core cable to a coaxial cable, allowing the reuse of existing feeder cables for both power and data transmission, eliminating the need for new cable routes and installations by converting the coaxial cable into a feeder cable for power supply and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing mobile radio systems are converted to RRH technology using separate power supply and data lines, then the system achieves modern RRH functionality, but installation costs and complexity increase significantly
Solution Approach 1:
The patent combines power supply and data transmission functions into a single existing coaxial cable infrastructure. By using the coaxial cable's inner conductor for power supply and the shield for data transmission, the system merges multiple functions into one cable, eliminating the need for separate power and data cable installations.
Solution Approach 2:
The existing coaxial cable is made multi-functional by using it simultaneously for high-frequency signal transmission, power supply to the RRH, and data communication. This universal use of the existing cable infrastructure eliminates the need for additional dedicated cables for each function.
2Reliability
If separate power supply and data cables are installed for RRH conversion, then full RRH functionality is achieved, but installation costs increase
Solution Approach 1:
The patent recovers the utility of existing coaxial cable infrastructure that would otherwise be underutilized. By repurposing the existing cable for power supply and data transmission in addition to its original high-frequency signal function, the system avoids the cost of installing new cables while achieving full RRH functionality.
3Ease of manufacture
If existing coaxial cable is reused for power and data transmission, then installation costs are reduced, but electrical isolation and interference protection become critical challenges
Solution Approach 1:
The patent introduces isolation transformers as intermediary devices between the power supply and the RRH. These transformers provide galvanic isolation to prevent electrical interference and protect against voltage spikes, while still allowing power transmission through the coaxial cable's inner conductor.
Solution Approach 2:
The patent applies different electrical characteristics to different parts of the coaxial cable system. The inner conductor carries power with isolated transformers at each end, while the shield carries data signals with appropriate impedance matching, creating locally optimized electrical environments for each function.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An adapter (301, 311) for connecting a multi-core cable (305) to a coaxial cable (105) is proposed. The adapters are used in an arrangement with several adapters connected to each other via a coaxial cable. The adapters and the arrangement enable the cost-effective conversion of existing mobile communication systems to modern RRH technology.