Dual-Mode Leaky Coaxial Cable for Indoor MIMO Coverage
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Solution Overview
Problem
Current antenna-feeder distribution systems for indoor 5G networks lack the capability to achieve MIMO effects, leading to increased construction difficulties and costs due to the need for multi-channel systems, which are not efficiently supported by single-output systems.
Innovation Solution
A leaky coaxial cable with a dual-mode transmission characteristic, featuring periodically slotted holes on the outer conductor, allowing for both feeder and leaky transmission channels, enabling multiple input multiple output (MIMO) capabilities while reducing construction costs and avoiding interference between systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-output antenna-feeder distribution system is used, then the construction is simple and costs are low, but MIMO effects cannot be achieved and network capacity is limited
Solution Approach 1:
The leaky coaxial cable is designed to perform multiple functions simultaneously: it acts as both a feeder transmission line and a leaky antenna system. The cable structure integrates the functions of traditional separate feeder and antenna systems, enabling single-cable deployment to achieve both coverage and MIMO capabilities
Solution Approach 2:
The patent combines the feeder transmission channel and leaky transmission channel into a single integrated cable structure. The inner conductor, intermediate conductor, and outer conductor with slotted holes work together to simultaneously support both transmission modes within one physical medium, eliminating the need for separate systems
2Adaptability or versatility
If a multi-channel antenna-feeder system is added to achieve MIMO effects, then network capacity increases, but construction difficulty and time double
Solution Approach 1:
The leaky coaxial cable serves as a universal system that simultaneously provides feeder transmission and leaky radiation functions. This multi-functional design eliminates the need for separate multi-channel antenna-feeder systems, reducing construction complexity while maintaining MIMO capability
Solution Approach 2:
The patent merges multiple transmission functions into a single integrated cable structure. By combining the feeder and leaky transmission channels in one cable, the system achieves MIMO effects without requiring multiple separate antenna-feeder systems, thereby halving the construction complexity
3Adaptability or versatility
If a multi-channel antenna-feeder system is deployed, then MIMO effects are achieved, but installation space and environmental requirements become more stringent
Solution Approach 1:
The leaky coaxial cable provides universal functionality by integrating feeder and antenna operations in a single component. This eliminates the need for multiple separate antenna-feeder systems that would require additional installation space and stricter environmental controls
Solution Approach 2:
By combining multiple transmission channels into one integrated cable structure, the system reduces the physical space required for installation. The single-cable approach eliminates the need for multiple parallel antenna-feeder systems, thereby reducing installation area requirements and environmental constraints
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
The dual-mode transmission characteristic of the leaky coaxial cable enhances indoor MIMO capabilities, reduces construction costs, and allows for efficient signal coverage in indoor environments, supporting a broader range of applications and avoiding mutual interference between different systems.
Implementation Method 1
periodically slotted holes are opened on several length segments of the outer conductor, the intermediate conductor and the outer conductor construct a leaky transmission channel
Data Source
AI summary
A leaky coaxial cable according to the present disclosure includes: an inner conductor, a first insulating dielectric layer, an intermediate conductor, a second insulating dielectric layer and an outer conductor arranged from the inside to the outside in proper order, where the inner conductor, the intermediate conductor and the outer conductor are coaxially arranged, periodically slotted holes are opened on several length segments of the outer conductor, the intermediate conductor and the outer conductor construct a leaky transmission channel, and the inner conductor and the intermediate conductor construct a feeder transmission channel. The leaky coaxial cable according to the present disclosure integrates feeder transmission and leaky transmission to have a dual-mode transmission characteristic, and may be used to solve a problem that system capacity cannot be increased when signal coverage is carried out indoors. The present disclosure further provides an indoor distribution system using the above leaky coaxial cable.