Vehicle Antenna Layout Using Polyhedral 5G-LTE Isolation
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Solution Overview
Problem
Current antenna systems for vehicles face challenges in providing next-generation communication services like 5G while maintaining sufficient isolation between LTE and 5G antennas, especially in compact vehicle designs, where interference and size constraints are significant.
Innovation Solution
The proposed antenna system employs a shark fin-shaped structure with polyhedral arrangements of antenna elements, utilizing MIMO and beamforming capabilities to optimize isolation and size, incorporating multiple antennas for LTE, 5G, satellite broadcasting, FM reception, and GPS within a compact, flat design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antenna systems (LTE and 5G) are arranged in a vehicle to provide both existing and next-generation communication services, then communication service capability is improved, but mutual interference between antennas increases
Solution Approach 1:
The patent transitions from traditional planar antenna arrangements to a three-dimensional configuration using a polyhedral structure. The 5G antenna elements are positioned on the surface of a polyhedron, creating spatial separation in multiple dimensions from the LTE antennas. This dimensional transformation enables simultaneous operation of both antenna systems with reduced interference while maintaining compact overall size.
Solution Approach 2:
The antenna system is divided into distinct functional segments: LTE antennas are separated from 5G antennas, with each group positioned in different spatial zones. The 5G antenna elements are further segmented and distributed across multiple faces of the polyhedral structure, allowing independent optimization of each antenna group's performance while minimizing mutual interference.
2Object-generated harmful factors
If antenna isolation is increased to reduce interference between LTE and 5G antennas, then mutual interference is reduced, but the overall size of the antenna system increases
Solution Approach 1:
The patent embeds the 5G antenna elements on the surface of a polyhedral structure that is itself integrated within the vehicle's roof or body structure. The LTE antennas are positioned in the space surrounding the polyhedron, creating a nested configuration where the polyhedron serves as both the 5G antenna platform and a space-saving containment structure. This nesting achieves high isolation without proportionally increasing overall volume.
Solution Approach 2:
By moving from two-dimensional planar separation to three-dimensional polyhedral arrangement, the system achieves greater isolation distances within a compact volume. The polyhedral geometry provides natural spatial separation in multiple directions, allowing reduced interference without requiring a proportional increase in the antenna system's overall footprint.
3Length of stationary object
If a flat antenna structure is used to reduce vehicle height, then vehicle profile is improved, but arrangement flexibility for different antenna types is reduced
Solution Approach 1:
The patent resolves the flatness vs. flexibility contradiction by utilizing the three-dimensional surface of a polyhedron. While the overall structure maintains a low vehicle profile, the polyhedral geometry provides multiple faces and angles that enable flexible arrangement of different antenna types. The 5G elements can be positioned on various faces of the polyhedron, achieving both compact height and arrangement versatility.
Solution Approach 2:
The polyhedral structure employs asymmetric face orientations and angles, allowing different antenna types to be positioned on faces with optimal orientations for their respective radiation patterns. This asymmetric geometry provides arrangement flexibility while maintaining a compact overall form factor that preserves a low vehicle profile.
Data Source
AI summary
A vehicle-mounted antenna system according to the present invention comprises: a first antenna system in which a plurality of first antenna elements disposed in a structure mounted on a vehicle perform multiple-input and multiple-output (MIMO); and a second antenna system in which a plurality of second antenna elements attached to a side surface of a polyhedron disposed in the structure perform beamforming, wherein the disposed plurality of first antenna elements are formed, in the front and back of the polyhedron, on a substrate erected at a predetermined angle to the structure, and thus, the present invention may provide an antenna array optimized in terms of spacing between antenna elements in a flat-type vehicle antenna provided with an LTE antenna system and a 5G antenna system.