Multi-band Antenna 3D Structure Bandwidth
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Solution Overview
Problem
Existing multi-band antennas have narrow bandwidths, limiting their effectiveness in wireless communication systems.
Innovation Solution
A multi-band antenna design featuring a parasitic unit, a first radiation portion, and a second radiation portion, where the first and second radiation portions are located between the parasitic unit and a ground portion, with the second ground surface raising the first and second radiation portions, creating a 'U' shape in cross-section, allowing operation across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional multi-band antenna design with planar strips is used, then the antenna can operate in multiple frequency bands, but the bandwidth is narrow (5.7%)
Solution Approach 1:
The patent transitions from a planar two-dimensional antenna structure to a three-dimensional structure by raising the first and second radiation portions above the ground plane using a support structure. This dimensional change allows the radiation portions to be positioned at different heights, creating multiple resonance paths and expanding the operational bandwidth from 5.7% to 57.7% while maintaining multi-band capability
2Duration of action of moving object
If the radiation portions are raised above the ground plane in a 3D configuration, then the bandwidth increases to 57.7%, but the structural complexity increases
Solution Approach 1:
The antenna is divided into distinct functional segments: the ground plane, the support structure, the first radiation portion, and the second radiation portion. Each segment is optimized independently for its specific function, allowing the complex 3D structure to be managed through modular design while achieving the 57.7% bandwidth improvement
3Adaptability or versatility
If multiple radiation portions are positioned between the parasitic unit and ground portion, then multiple frequency bands are covered, but the antenna size increases
Solution Approach 1:
The first and second radiation portions are nested within the vertical space defined by the parasitic unit and the ground plane, with the support structure enabling them to occupy different height levels. This nested arrangement allows multiple frequency bands to be covered while minimizing the horizontal footprint and overall volume of the antenna structure
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 design achieves a wider bandwidth of 57.7% across frequency bands, enhancing communication efficiency in systems like WiMAX by merging frequency bands and optimizing antenna geometry.
Implementation Method 1
a parasitic unit connecting with the ground portion and operated at a first frequency band, a first radiation portion having a feeding point and operated at a second frequency band, a second radiation portion connecting with the feeding point and operated at a third frequency band
Data Source
AI summary
The present invention discloses a multi-band antenna. The antenna includes a ground portion, a parasitic unit connecting with the ground portion and operated at a first frequency band, a first radiation portion having a feeding point and operated at a second frequency band, a second radiation portion connecting with the feeding point and operated at a third frequency band. The first radiation portion and the second radiation portion are located between the parasitic unit and the ground portion.