Display Antenna Structure With Parasitic Elements for Wideband Coverage
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Solution Overview
Problem
Current antenna designs for image display devices face challenges in achieving high frequency coverage with multi-polarization and broadband properties while maintaining radiation efficiency and reliability, especially as the driving frequency increases, leading to signal loss and reduced antenna gain.
Innovation Solution
The proposed antenna structure incorporates a radiator with convex and concave portions, transmission lines, and parasitic elements arranged on a dielectric layer, where the parasitic elements are strategically positioned to enhance frequency coverage and polarization, with lengths adjusted to optimize radiation properties across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna operates at high frequency to provide wide frequency coverage, then frequency coverage is improved, but signal loss increases and radiation efficiency decreases
Solution Approach 1:
The antenna is divided into multiple functional segments: a radiator with convex and concave portions for primary radiation, transmission lines for signal distribution, and separate parasitic elements for frequency tuning. This segmentation allows each component to be optimized independently, enabling wide frequency coverage while managing signal loss through coordinated design of each segment.
Solution Approach 2:
Parasitic elements are introduced as intermediary components that are electrically connected to the transmission lines but physically separated from the radiator. These parasitic elements act as mediators to extend frequency coverage and improve radiation efficiency at high frequencies by creating additional resonance paths without directly interfering with the primary radiation structure.
2Adaptability or versatility
If the radiation coverage is expanded to increase antenna coverage, then antenna coverage is improved, but radiation density decreases and antenna gain is reduced
Solution Approach 1:
The radiator features convex portions that concentrate electromagnetic energy in specific directions and concave portions that create localized radiation patterns. This local quality variation allows different regions of the antenna to serve different functions, maintaining high radiation density in certain directions while expanding overall coverage area.
Solution Approach 2:
The antenna design incorporates three-dimensional structural features including convex and concave portions that create multiple radiation dimensions. The parasitic elements are positioned at specific spatial relationships to the transmission lines, adding vertical and angular dimensions to the radiation pattern, thereby expanding coverage without sacrificing gain in primary directions.
3Power
If multi-polarization properties are implemented to increase radiation efficiency, then radiation efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple polarization functions are merged into a single integrated antenna structure. The radiator with its convex and concave portions, combined with the transmission lines and parasitic elements, simultaneously supports multiple polarization modes without requiring separate antenna elements for each polarization, thereby reducing overall device complexity.
Solution Approach 2:
The antenna structure is designed with universal functionality where the same physical components (radiator, transmission lines, parasitic elements) serve multiple purposes: the convex portions provide one polarization mode, the concave portions provide another, and the parasitic elements enhance both polarization directions. This multi-functionality achieves multi-polarization without proportionally increasing complexity.
4Adaptability or versatility
If parasitic elements are positioned adjacent to transmission lines to enhance frequency coverage, then frequency coverage is improved, but spatial efficiency decreases
Solution Approach 1:
The parasitic elements are strategically positioned to nest within the existing spatial framework of the transmission lines. Rather than adding significant external volume, the parasitic elements are placed in the spaces between and around the transmission line structures, utilizing unused spatial regions to achieve frequency coverage enhancement with minimal additional area.
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
This configuration results in a multi-band antenna with improved radiation efficiency and spatial efficiency, achieving effective frequency coverage from 10 GHz to 40 GHz with reduced signal loss and enhanced reliability.
Implementation Method 1
a length of the parasitic element in an extension direction of the transmission line is from 45% to 70% of a half wavelength (λ/2) at a maximum resonance frequency from the antenna unit
Data Source
AI summary
An antenna structure according to an embodiment of the present disclosure includes a dielectric layer, and an antenna unit disposed on a top surface of the dielectric layer. The antenna unit includes a radiator including convex portions and concave portions, a transmission line including a first transmission line and a second transmission line that extend in different directions to be connected to the radiator, and a parasitic element disposed to be adjacent to the transmission line and electrically and physically separated from the transmission line and the radiator. A length of the parasitic element in an extension direction of the transmission line is from 45% to 70% of a half wavelength (λ/2) at a maximum resonance frequency from the antenna unit.