Transparent Antenna Thin Substrate Multiband 5G Design
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Solution Overview
Problem
Existing transparent antennas for 5G mobile communication systems are limited by their thickness and are primarily single-band, failing to effectively communicate in multiple frequency bands due to the requirement of a ground layer, which increases thickness and restricts their usability in multiband applications.
Innovation Solution
A transparent antenna design featuring a thin transparent substrate with a metal thin wire layer having an opening ratio of 80% or more, where the metal conductor is placed 0.15 mm apart, allowing for communication in at least two 5G frequency bands (2 GHz to 50 GHz) with improved input reflection coefficient and radiation efficiency, eliminating the need for a ground layer to reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ground layer is added to the patch antenna to improve antenna characteristics, then the antenna performance is improved, but the substrate thickness increases beyond the mountable range
Solution Approach 1:
The invention extracts and removes the ground layer from the traditional patch antenna structure. By eliminating this component, the antenna achieves good performance without requiring a thick substrate, thus resolving the contradiction between antenna characteristics and substrate thickness.
Solution Approach 2:
The invention uses a thin transparent substrate without requiring a thick ground layer. The antenna elements are designed to function effectively on thin substrates, enabling integration into displays and touch panels with limited thickness while maintaining good antenna characteristics.
2Ease of manufacture
If a traditional patch antenna structure is used, then the antenna can be manufactured, but it only supports single-band communication and cannot communicate in multiple 5G frequency bands
Solution Approach 1:
The invention designs the antenna with a configuration that enables it to operate across multiple 5G frequency bands. The antenna elements and their arrangements are optimized to provide universal communication capability across different bands (e.g., 24.2-29.5 GHz and 37.3-40 GHz), allowing a single antenna structure to perform multiple communication functions.
Solution Approach 2:
The invention adjusts key parameters such as the size, shape, and spacing of antenna elements to achieve resonance across multiple frequency bands. By optimizing these parameters, the antenna maintains good performance in both lower and upper 5G bands without requiring separate antenna structures for each band.
3Length of stationary object
If the metal thin wire layer has high opening ratio to reduce thickness, then the antenna thickness is reduced, but the radiation efficiency may be affected
Solution Approach 1:
The invention uses a thin metal thin wire layer with high opening ratio (80% or more) as the antenna element structure. This thin film approach reduces the overall antenna thickness while maintaining sufficient electrical conductivity and radiation efficiency through optimized wire arrangement and spacing.
Solution Approach 2:
The invention combines transparent substrate materials with metal thin wire layers to create a composite structure. This composite design achieves both thinness and effective radiation by optimizing the interaction between the transparent substrate and the metal wire elements, maintaining good radiation efficiency despite the high opening ratio.
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 solution enables communication in multiple 5G frequency bands while significantly reducing the antenna's thickness, making it suitable for diverse 5G applications and compatible with various frequency assignments worldwide.
Implementation Method 1
a metal thin wire layer on an upper side of the transparent substrate, the transparent substrate having a thickness of 300 μm or less, the metal thin wire layer has an opening ratio of 80% or more, and when a metal conductor having a surface resistivity ρΩ/sq being placed parallel to the transparent antenna
Data Source
AI summary
A transparent antenna includes a transparent substrate; and a metal thin wire layer on an upper side of the transparent substrate. The transparent substrate has a thickness of 300 μm or less. The metal thin wire layer has an opening ratio of 80% or more. When a metal conductor having a surface resistivity ρΩ/sq is placed parallel to the transparent antenna 0.15 mm apart, an input reflection coefficient S11(ρ, f) and a radiation efficiency Eff(ρ, f) at a frequency f satisfy relationsS11(0.1 Ω/sq, f1 GHz)<−3 dB,S11(0.1 Ω/sq, f2 GHz)<−3 dB, and|Eff(0.1 Ω/sq, f1 GHz)−Eff(0.1 Ω/sq, f2 GHz)|<25%at two frequencies f1 and f2 that are between 2 GHz and 50 GHz.