Split Ring Antenna Facing Portion Capacitance Stability
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Solution Overview
Problem
Existing antennas experience variations in antenna characteristics when their facing portions are moved relative to each other in the up-down direction, affecting capacitance and overall performance.
Innovation Solution
The design incorporates a split ring resonator antenna with a facing portion configuration where the second facing portion is interposed between the upper and lower facing portions, allowing for controlled capacitance adjustment by moving the second facing portion relative to both, thereby maintaining consistent antenna characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first facing portion and the second facing portion are relatively moved in the up-down direction, then the capacitance of the capacitor is changed, but the antenna characteristics become unstable
Solution Approach 1:
The first facing portion is divided into an upper facing portion and a lower facing portion. The second facing portion is positioned between these two segments in the up-down direction. This segmentation allows the capacitance to be determined by the combined effect of two separate capacitive couplings (second facing portion with upper facing portion, and second facing portion with lower facing portion), making the total capacitance less sensitive to vertical displacement between the first and second facing portions.
Solution Approach 2:
The invention changes the geometric configuration parameter by splitting the first facing portion into upper and lower parts with the second facing portion interposed between them in the up-down direction. This parameter change transforms the single-capacitor structure into a distributed capacitor structure, where the total capacitance is the series or parallel combination of multiple capacitive couplings, thereby stabilizing the antenna characteristics against vertical movements.
2Quantity of substance
If the second facing portion is moved closer to the upper facing portion to increase capacitance, then the capacitance between them increases, but the capacitance with the lower facing portion decreases
Solution Approach 1:
The upper and lower facing portions act as counterbalancing elements. When the second facing portion moves closer to the upper facing portion (increasing capacitance with upper portion), it simultaneously moves away from the lower facing portion (decreasing capacitance with lower portion). This counterbalancing effect compensates for the capacitance variation, maintaining relatively stable total capacitance and antenna characteristics.
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 ensures minimal variation in antenna characteristics even when the facing portions are moved, stabilizing capacitance and maintaining consistent performance.
Implementation Method 1
capacitance of a capacitor constituted by the first facing portion and the second facing portion
Data Source
AI summary
An antenna comprises a main portion, a facing portion, a first feed terminal and a second feed terminal. The main portion has a ring shape with a split. The main portion has a first end portion and a second end portion. The first end portion and the second end portion are positioned away from each other in a right-left direction with the split left therebetween. The facing portion includes a first facing portion and a second facing portion. The first facing portion and the second facing portion are spaced away from each other. The first facing portion has an upper facing portion and a lower facing portion. The second facing portion is interposed between the upper facing portion and the lower facing portion in an up-down direction perpendicular to the right-left direction.