Mesh Transmission Line Layout for Wideband Return Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antennas with mesh-like conductor patterns face challenges in reducing return loss over a wide frequency range due to increased frequency dependence from inductance components.
Innovation Solution
A transmission line configuration that includes a mesh-like conductor pattern with a planar conductor portion electrically connected to the mesh portion, where the planar conductor portion is disposed apart and has a length greater than or equal to its width, functioning as a capacitance component to cancel the increase in inductance, thereby reducing return loss across a wide frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a mesh-like conductor pattern is used in the transmission line, then transparency is improved, but return loss increases due to increased inductance components
Solution Approach 1:
The patent changes the physical parameters of the conductor pattern by introducing a planar conductor portion with specific dimensional relationships (length in first direction ≥ length in second direction) to the mesh-like structure. This parameter modification adjusts the inductance and capacitance characteristics to reduce return loss while preserving the transparency benefits of the mesh configuration.
Solution Approach 2:
The transmission line employs a composite conductor structure combining two distinct conductor patterns: a mesh-like opening conductor portion for transparency and a planar conductor portion for electrical performance. This composite approach integrates the advantages of both structures to simultaneously achieve low return loss and high transparency.
2Reliability
If a mesh-like conductor pattern is used in the transmission line, then conductivity is maintained, but frequency dependence increases
Solution Approach 1:
The patent modifies the electrical parameters of the transmission line by incorporating a planar conductor portion with specific geometric parameters (length in first direction ≥ length in second direction). This changes the distributed inductance and capacitance values along the transmission line, thereby reducing frequency dependence and expanding the usable frequency range while maintaining conductivity.
Solution Approach 2:
The transmission line uses a composite conductor structure combining mesh-like and planar conductor portions. The mesh-like portion maintains conductivity while the planar portion with specific dimensional characteristics reduces frequency dependence, allowing the system to operate effectively across a broader frequency range.
3Reliability
If the planar conductor portion is placed close to the terminal portion, then electrical connection is improved, but capacitance effect is reduced
Solution Approach 1:
The patent applies local quality by creating a spatial distinction between different conductor portions: the planar conductor portion is positioned at a specific distance from the terminal portion to optimize capacitance effect, while the opening conductor portion provides the electrical connection path. This spatial arrangement allows each portion to perform its specific function optimally.
Solution Approach 2:
The opening conductor portion acts as an intermediary element between the terminal portion and the planar conductor portion. It provides the electrical connection while allowing the planar conductor portion to be positioned at an optimal distance to maximize capacitance effect, thereby mediating between the conflicting requirements of electrical connection and capacitance optimization.
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 effectively reduces return loss over a wide frequency range while maintaining high transparency and conductivity, improving the performance of antennas and display devices.
Implementation Method 1
the planar conductor portion has a length in the first direction greater than or equal to a length of the planar conductor portion in a second direction orthogonal to the first direction... functioning as a capacitance component to cancel the increase in inductance
Data Source
AI summary
A transmission line includes a line portion extending in a first direction on one main surface side of a dielectric, and a terminal portion connected to an end part of the line portion, in which the line portion includes an opening conductor portion having a conductor pattern including an opening, and a planar conductor portion configured to be electrically connected to the opening conductor portion and to have a conductor extending so as to form a planar surface, the planar conductor portion is disposed apart from the terminal portion in the first direction, and the planar conductor portion has a length in the first direction greater than or equal to a length of the planar conductor portion in a second direction orthogonal to the first direction.