Structure, antenna, wireless communication module, and wireless communication device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna designs face challenges with amplitude reduction due to phase-shifted reflected electromagnetic waves from metallic conductors, which can be mitigated by optimizing the distance between the antenna and the conductor, but this approach has limitations in effectively managing the interference.
Innovation Solution
A structure comprising a first conductor, a second conductor, a third conductor, and a fourth conductor, with the third conductor capacitively connecting the first and second conductors and having a dielectric body resist layer, is used to create an artificial magnetic conductor that minimizes the impact of reflected waves by maintaining a specific capacitance and geometry, allowing for efficient electromagnetic wave radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the distance between the antenna and metallic conductor is set to 1/4 wavelength to reduce reflected wave influence, then the interference from reflected waves is reduced, but the device complexity increases and manufacturing precision requirements increase
Solution Approach 1:
The patent changes the electrical parameters of the conductor structure by introducing a capacitive element (third conductor) that connects two conductors (first and second conductors) at different potentials. This capacitive connection modifies the effective impedance and electrical length of the structure, allowing it to achieve AMC characteristics without requiring the 1/4 wavelength physical distance constraint, thereby reducing device complexity while maintaining interference reduction benefits
2Object-affected harmful factors
If the distance between the antenna and metallic conductor is set to 1/4 wavelength to reduce reflected wave influence, then the interference from reflected waves is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The invention transforms the geometric parameter dependency (1/4 wavelength distance requirement) into an electrical parameter solution using capacitive coupling. The third conductor provides a fixed capacitance value that determines the electrical characteristics, making the system less sensitive to dimensional variations and easing manufacturing precision requirements while maintaining effective reflected wave cancellation
Solution Approach 2:
The third conductor acts as an intermediary capacitive element between the first and second conductors. This intermediary component provides a controlled electrical connection that establishes the desired impedance transformation and phase reversal characteristics without requiring precise control of the physical distance between the antenna and the conductor structure, thereby reducing manufacturing precision requirements
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 proposed structure enhances the radiation efficiency of the antenna by reducing the interference from reflected waves, maintaining amplitude, and allowing for improved usability in wireless communication devices.
Implementation Method 1
The third conductor is configured to capacitively connect the first conductor and the second conductor
Implementation Method 2
In the third conductor, a surface facing an opposite direction of the fourth conductor in the second direction is covered by a resist layer that includes a dielectric body
Implementation Method 3
The electromagnetic waves radiated from an antenna are reflected from a metallic conductor. The electromagnetic waves reflected from a metallic conductor have a phase shift of 180°
Implementation Method 4
The electromagnetic waves radiated from an antenna are reflected from a metallic conductor
Data Source
AI summary
A structure includes first to fourth conductors. The first conductor extends along a second plane including a second direction and a third direction intersecting with the second direction. The second conductor faces the first conductor along a first direction intersecting with the second plane and extends along the second plane. The third conductor capacitively connects the first conductor and the second conductor. The fourth conductor is electrically connected to the first conductor and the second conductor, and extends along a first plane including the first direction and the third direction. In the third conductor, a surface facing an opposite direction of the fourth conductor in the second direction is covered by a resist layer that includes a dielectric body. In the resist layer, a thickness above a central portion of the third conductor is lower than a thickness above a peripheral edge portion of the third conductor.