Roof Antenna Array for Phase Diversity Signal Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Diversity antenna systems for vehicles face challenges in effectively reducing multi-path interference and improving reception quality due to suboptimal antenna placement and signal processing, particularly in vehicles where traditional antenna configurations may not adequately address fringe area reception and signal coherence.
Innovation Solution
A diversity antenna system utilizing multiple phase diversity antenna elements positioned substantially parallel to a vehicle's exterior surface, with adaptive phase and amplitude processing to combine incoming signals in a way that minimizes interference and enhances reception, using a configuration where antenna elements can be integrated into or attached to roof rails, and employing adaptive phase diversity technology to align and combine signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antenna configurations are used on vehicles, then antenna placement is simplified, but reception quality and multi-path interference reduction are insufficient
Solution Approach 1:
The antenna system is divided into multiple antenna elements (at least two) positioned at different locations on the vehicle, each receiving signals independently. This segmentation allows the system to process multiple signal paths separately and combine them to reduce multi-path interference, thereby improving reception quality without requiring a single complex antenna structure
Solution Approach 2:
The patent positions antenna elements in three-dimensional space around the vehicle (e.g., on roof, sides, or rear), utilizing spatial distribution rather than planar placement. This dimensional approach enables the system to capture signals from multiple angles and paths, improving reception in fringe areas while maintaining a relatively simple implementation by distributing basic antenna elements throughout the vehicle structure
2Reliability
If multiple antenna elements are added to improve reception, then signal coverage is enhanced, but interference and signal coherence problems increase
Solution Approach 1:
The system employs signal processing that analyzes incoming signals from multiple antenna elements and adjusts combining weights to maximize desired signal reception while minimizing interference. This feedback-based processing allows the system to adapt to varying signal conditions and multi-path environments, maintaining signal coherence across multiple elements
Solution Approach 2:
The patent converts the harmful effect of multi-path interference into a benefit by using signal processing techniques that exploit the spatial and temporal characteristics of multiple signal paths. Instead of treating reflected and scattered signals as purely detrimental, the system processes them to extract useful information and combine them constructively, thereby improving overall reception quality
3Ease of manufacture
If antenna elements are positioned parallel to vehicle surface for aesthetic integration, then vehicle appearance is maintained, but antenna effectiveness may be reduced
Solution Approach 1:
The patent merges the antenna elements with existing vehicle structures such as roof rails, window frames, or body panels. By integrating antennas into these structural components, the system maintains vehicle aesthetics and simplifies installation while ensuring adequate antenna positioning for effective signal reception through strategic placement at multiple locations
4Reliability
If antenna surface area is increased to improve reception, then signal quality enhances, but wind noise and aerodynamic drag increase
Solution Approach 1:
Rather than using a single large antenna surface area, the system segments the reception function across multiple smaller antenna elements distributed throughout the vehicle. This approach achieves equivalent or superior reception performance through spatial diversity while minimizing the aerodynamic impact of each individual element, thereby reducing wind noise and drag
Data Source
AI summary
A diversity antenna system may receive transmitted signals. The diversity antenna system includes multiple phase diversity antenna elements. One or more of the phase diversity antenna elements are positioned substantially parallel to an external surface of a vehicle. The phase diversity antenna elements are adapted to receive phase diversity signals.