Multi-band Sleeve Dipole Antenna with Nested Radiating Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multi-band antenna assemblies for wireless application devices struggle to efficiently cover a wide range of frequency bands, particularly between 2400 MHz and 2500 MHz, and 4900 MHz and 5850 MHz, due to limitations in design and material usage.
Innovation Solution
The development of a multi-band sleeve dipole antenna assembly featuring a coaxial cable, a metallic sleeve acting as a ground, and an antenna element with first and second radiating elements, where the first element is tuned for 2400-2500 MHz and the second for 4900-5850 MHz, with a non-solid, tubular construction and a heat shrink wrap coupling, allowing for improved frequency coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional solid cylindrical radiating elements are used, then structural simplicity is maintained, but frequency band coverage is limited
Solution Approach 1:
The radiating element is divided into multiple cylindrical sections (first cylindrical radiating element and second cylindrical radiating element) with different diameters, where each section is tuned to resonate at different frequency bands. This segmentation allows the antenna to cover multiple frequency bands (2400-2500 MHz and 4900-5850 MHz) simultaneously, resolving the contradiction between coverage and structural simplicity.
Solution Approach 2:
The invention transitions from a single-dimensional solid cylindrical structure to a multi-dimensional tubular structure with nested cylindrical sections of varying diameters. The first cylindrical radiating element has a larger diameter than the second cylindrical radiating element, creating a hierarchical dimensional structure that enables multi-band operation while maintaining structural organization.
2Adaptability or versatility
If multiple frequency bands are covered using conventional designs, then frequency coverage is improved, but manufacturing complexity increases
Solution Approach 1:
The second cylindrical radiating element is positioned inside the first cylindrical radiating element, creating a nested configuration where smaller diameter sections are housed within larger diameter sections. This nesting approach consolidates multiple radiating elements into a compact structure, simplifying the manufacturing process compared to assembling separate elements, while maintaining multi-band frequency coverage capability.
3Adaptability or versatility
If non-planar tubular construction is used, then multi-band frequency coverage is achieved, but structural complexity increases
Solution Approach 1:
Different sections of the radiating element have different local geometric qualities - the first cylindrical radiating element has a larger diameter optimized for lower frequency bands (2400-2500 MHz), while the second cylindrical radiating element has a smaller diameter optimized for higher frequency bands (4900-5850 MHz). This local quality variation in diameter along the longitudinal axis enables each section to resonate at its designated frequency band, achieving multi-band coverage through differentiated local geometry rather than uniform 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
The antenna assembly achieves a voltage standing wave ratio (VSWR) of 2:1 or less across the specified frequency bands, enhancing wireless communication capabilities and supporting various wireless standards, including WLANs, with improved mechanical integrity and manufacturing efficiency.
Implementation Method 1
a first radiating element tuned for receiving electrical resonant frequencies within a first frequency bandwidth
Implementation Method 2
a second radiating element tuned for receiving electrical resonant frequencies within a second frequency bandwidth different from the first frequency bandwidth
Data Source
AI summary
According to various aspects, antenna elements are provided for multi-band sleeve dipole antenna assemblies for use with wireless application devices. The antenna elements generally include first and second radiating elements. The first radiating elements may be tuned for receiving electrical resonant frequencies within a first frequency bandwidth. The second radiating elements may be tuned for receiving electrical resonant frequencies within a second frequency bandwidth different from the first frequency bandwidth.