Slotted Waveguide Section Coupling for Long-Range Vehicle Communication
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Solution Overview
Problem
The communication range in existing slotted waveguide systems is limited by electromagnetic wave attenuation, and the assembly of long waveguides is prone to deformation due to thermal changes in length.
Innovation Solution
A communication system with a slotted waveguide divided into sections separated by gaps, where each section has its own antenna and is coupled via a reciprocal power divider, directional couplers, or tapper to enable continuous signal transmission across gaps, ensuring noise immunity and flexibility in vehicle movement paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the slotted waveguide is assembled from several sections to achieve great length, then the communication range is extended, but deformation occurs as a result of thermal change in length during temperature changes
Solution Approach 1:
The waveguide is divided into multiple separate sections (first section, second section, etc.) that are coupled together via coupling devices. This segmentation allows each section to independently accommodate thermal expansion and contraction, preventing cumulative deformation while maintaining the overall great length needed for extended communication range.
2Length of stationary object
If the slotted waveguide is made great in length to extend communication range, then the communication range is extended, but the attenuation of electromagnetic waves increases during propagation
Solution Approach 1:
Coupling devices are introduced as intermediary components between waveguide sections. These coupling devices efficiently transfer electromagnetic waves between sections while minimizing signal loss, thereby extending communication range without proportionally increasing attenuation.
3Stability of the object's composition
If gaps are introduced between waveguide sections to permit thermal change in length, then thermal stability is improved, but signal transmission across the gap must be bridged
Solution Approach 1:
Coupling devices serve as intermediary components that bridge the gaps between waveguide sections. These devices perform the dual function of maintaining electrical continuity for signal transmission while allowing mechanical separation for thermal expansion, thus resolving the conflict between thermal stability and signal transmission.
4Reliability
If multiple antennas are provided in different sections with coupling devices, then noise immunity is improved through collision recognition, but the device complexity increases
Solution Approach 1:
The communication system is segmented into multiple independent antenna-coupling device units distributed across different waveguide sections. Each unit can independently transmit and receive signals, enabling collision recognition and noise immunity through comparison of signals from multiple vehicles, while the modular segmented structure manages the overall system complexity.
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 solution extends communication range and maintains reliability and noise immunity by bridging gaps between waveguide sections, allowing for efficient signal transmission over long distances and accommodating thermal changes, thus enabling reliable communication along extensive vehicle movement paths.
Implementation Method 1
An antenna is arranged on a vehicle so that it projects through a slot into the cavity of a waveguide and can receive and/or transmit electromagnetic waves propagating along the waveguide
Implementation Method 2
A slotted waveguide of great length must also be assembled from several sections, which produces the problem of deformation as a result of thermal change in length during temperature changes
Data Source
AI summary
A communication system for communication between at least one vehicle guided along a predefined movement path and a stationary station using a slotted waveguide which extends parallel to the movement path of the vehicle and into which at least one antenna connected to a transceiver unit of the stationary station and at least one antenna of the vehicle project. The antenna of the vehicle is moved in the longitudinal direction of the slotted waveguide with movement of the vehicle. The slotted waveguide includes at least two sections separated from one another by a respective gap. At least one antenna projecting into the respective section is provided for each section of the slotted waveguide. Two neighboring antennas projecting into different sections of the slotted waveguide are coupled via a coupling device both to a common transceiver unit of the stationary station and to one another.