Antenna Patch Unit for Vehicle Communication Range
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Solution Overview
Problem
Intelligent vehicles face reduced communication effectiveness due to eccentricity caused by metal roof panels, leading to a shortened communication range and inefficient radiation of electromagnetic energy, which affects their ability to receive and transmit driving information and road condition data.
Innovation Solution
An antenna apparatus with a parasitic patch unit spaced apart from a pattern unit on a dielectric substrate, optimized to radiate energy horizontally and minimize signal attenuation, enhancing communication range and efficiency by focusing radiant energy towards the front and rear sides of the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an omnidirectional antenna is used to transmit radiant energy in all directions, then the radiation coverage is comprehensive, but the radiation area is reduced due to energy waste in unnecessary directions
Solution Approach 1:
The patent applies local quality by creating directionally selective radiation characteristics in specific regions of the antenna structure. The reflective patch is positioned to reflect electromagnetic waves preferentially in horizontal directions (front and rear sides of the vehicle) while suppressing radiation in other directions, thereby concentrating energy where it is needed for V2X communication.
Solution Approach 2:
The patent introduces asymmetry by placing a reflective patch at a specific asymmetric position relative to the antenna radiator. This asymmetric configuration creates unequal radiation patterns in different directions, with enhanced horizontal radiation and suppressed vertical or omnidirectional radiation, thus extending the effective radiation area in critical directions while reducing overall energy waste.
2Reliability
If a conventional antenna is used on a vehicle with metal roof panel, then the antenna structure is simple, but eccentricity occurs causing shortened communication range
Solution Approach 1:
The patent introduces a reflective patch as an intermediary element between the antenna radiator and the surrounding environment. This reflective patch acts as a mediator that shapes and directs the electromagnetic waves, correcting the eccentricity caused by the metal roof panel without requiring complex antenna restructuring. The reflective patch serves as a simple yet effective component that improves communication reliability by focusing energy toward partner vehicles.
3Length of moving object
If the antenna radiates energy upward as well as forward and backward, then the radiation coverage is comprehensive, but communication range is shortened due to eccentricity
Solution Approach 1:
The reflective patch creates localized radiation enhancement in horizontal directions (front and rear) by reflecting electromagnetic waves constructively in these directions. This local quality approach concentrates energy where it is needed for V2X communication with partner vehicles, thereby extending communication range while reducing energy waste in vertical or other directions.
Solution Approach 2:
The asymmetric positioning of the reflective patch relative to the antenna radiator creates directionally selective radiation patterns. This asymmetry suppresses upward or omnidirectional radiation while enhancing horizontal radiation, thus extending communication range in critical directions and reducing energy loss in unnecessary directions.
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 solution extends the radiation area and improves communication performance between vehicles, enhancing the autonomous driving capabilities and user satisfaction by ensuring effective data transmission and reception of driving information.
Implementation Method 1
a patch unit disposed on the substrate to be spaced apart from one side of the pattern unit with a first distance and limiting radiation of an energy radiated from one side of the pattern unit
Data Source
AI summary
An antenna apparatus includes a substrate formed of a dielectric material; a pattern unit disposed on one surface of the substrate and radiating energy of electromagnetic wave; and a patch unit disposed on the substrate to be spaced apart from one side of the pattern unit with a first distance and configured to limit radiation of an energy radiated from the one side of the pattern unit.