Antenna Parasitic Element Offset for Radiation Pattern Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna systems with multiple elements suffer from mutual interference issues, leading to deformation of radiation patterns, which complicates design and introduces frequency characteristic variances, especially when elements are arranged in close proximity.
Innovation Solution
Incorporating a planar parasitic element arranged in parallel to the first antenna element within its near-field, with a predetermined distance and offset, to reduce interference and improve radiation patterns without modifying the existing antenna elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple antenna elements are arranged in close proximity to share housing and circuitry, then structural advantages and component sharing are achieved, but mutual interference effects occur causing radiation pattern deformation
Solution Approach 1:
A parasitic element is introduced as an intermediary component between the first and second antenna elements. This parasitic element couples electromagnetically to both antenna elements and acts as a mediator to reduce their mutual interference. The parasitic element is positioned within the near-field of the first antenna element and has specific dimensional relationships (distance and offset) to both antenna elements to optimize interference reduction while maintaining structural integration.
2Object-affected harmful factors
If frequency selective surfaces are used to reduce interference between antenna elements, then radiation pattern improvement is achieved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The invention extracts the interference reduction function from complex frequency selective surfaces and implements it through a simpler parasitic element structure. Instead of using metallization pattern structures with quasi band-pass or band-reject filter characteristics, the patent uses a single parasitic element with specific geometric relationships to achieve similar interference mitigation with reduced structural complexity.
3Object-affected harmful factors
If antenna elements are subdivided into segments to reduce electromagnetic coupling, then interference is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The invention applies segmentation by dividing the interference reduction function into two separate antenna elements (first and second antenna elements) with different electrical lengths, rather than subdividing a single antenna element. This approach reduces electromagnetic coupling through element separation and frequency differentiation while avoiding the manufacturing precision issues associated with segment alignment.
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 arrangement of a planar parasitic element within the antenna system effectively reduces interference between antenna elements, enhancing the radiation patterns and simplifying the design by maintaining the original antenna element configurations.
Implementation Method 1
The plurality of antenna elements is electromagnetically coupled to a bridge. The parasitic element is arranged within the near-field of the first antenna element
Implementation Method 2
The planar parasitic element is arranged within the near-field of the first planar antenna element
Data Source
Figure 1A~1B
Figure 1C
Figure 2A~2B
AI summary
The invention relates to an improved antenna system and antenna module incorporating same. The antenna system comprises a first planar antenna element, and at least one second antenna element, which are arranged along an axis, and further a planar parasitic element arranged within the near-field of the first planar antenna element, the planar parasitic element being arranged substantially in parallel to the first planar antenna element and being arranged at a predetermined distance therefrom. The center of the planar parasitic element is offset with respect to the center of the first planar antenna element in a direction away from the at least one second antenna element along the axis, so as to reduce a deformation of the radiating pattern of the first planar antenna element due to an interference with the at least one second antenna element.