Hybrid Radiating Cable with Hollow Waveguide Inner Conductor
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Solution Overview
Problem
Conventional radiating cables, such as leaky coaxial cables, are not suitable for transmitting signals with higher frequency ranges due to increased attenuation, requiring separate cables for different frequency bands, leading to higher costs, increased installation work, and reduced space efficiency.
Innovation Solution
A radiating cable design featuring an inner conductor, an outer conductor with radial openings, and an isolation layer, where the inner conductor includes a hollow waveguide, allowing for simultaneous transmission of signals across different frequency bands without interference, enabling efficient communication within VHF, UHF, SHF, EHF, and THF ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional leaky coaxial cables are used for signal transmission, then transmission is possible within certain frequency ranges, but attenuation increases significantly at higher frequencies making them unsuitable
Solution Approach 1:
The patent combines two different transmission mechanisms into a single hybrid cable structure: coaxial transmission line mode for lower frequencies and hollow waveguide mode for higher frequencies. The inner conductor is designed with a hollow waveguide structure that can support both transmission modes, allowing the cable to operate effectively across a broad frequency spectrum from VHF to EHF bands without significant attenuation in either range.
2Reliability
If separate radiating cables are provided for different frequency bands, then each cable can be optimized for its specific band, but costs increase, installation work increases, and space requirements increase
Solution Approach 1:
The hybrid cable is designed to perform multiple functions within a single structure: it can transmit signals across multiple frequency bands (VHF, UHF, SHF, EHF) simultaneously through different transmission modes. The cable system replaces what would traditionally require multiple separate cables, each optimized for specific frequency bands, thereby reducing system complexity while maintaining frequency-specific optimization through the dual-mode transmission capability.
3Reliability
If separate radiating cables are provided for different frequency bands, then frequency-specific transmission is achieved, but the number of cables required increases leading to higher installation costs
Solution Approach 1:
The invention merges the functionality of multiple frequency-specific cables into a single hybrid cable structure. By implementing dual transmission modes (coaxial and waveguide) within one cable, the system eliminates the need for separate cables for different frequency bands, reducing the quantity of cable material required while maintaining frequency-specific transmission capabilities through mode-selective operation.
4Reliability
If separate radiating cables are provided for different frequency bands, then each cable can be optimized, but the installation work and complexity increase
Solution Approach 1:
The hybrid cable provides universal functionality across multiple frequency bands within a single installation unit. Rather than requiring separate installations for different frequency bands, the cable can be installed once and configured to operate in either coaxial mode or waveguide mode depending on the frequency range required, significantly simplifying installation procedures while maintaining optimized performance for each frequency band.
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 hybrid radiating cable facilitates the simultaneous transmission of signals with different frequencies, reducing the need for multiple cables, lowering costs, and simplifying installation while maintaining efficient communication across various frequency bands.
Implementation Method 1
the inner conductor comprises a hollow waveguide
Implementation Method 2
an isolation layer arranged radially between the inner conductor and the outer conductor
Data Source
AI summary
Radiating cable (100; 100a; 100b; 100c; 100d; 100e) for radiating electromagnetic energy, comprising an inner conductor (110), an outer conductor (120) arranged radially outside of said inner conductor (110), and an isolation layer (130) arranged radially between said inner conductor (110) and said outer conductor (120), wherein said outer conductor (120) comprises one or more first openings (1202), and wherein said inner conductor (110) comprises a hollow waveguide (1100).