Antenna Gain via Asymmetric Passive Elements
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Solution Overview
Problem
Existing antennas face challenges in enhancing their gain effectively.
Innovation Solution
The antenna design incorporates a dielectric layer with a conductive ground layer featuring even-numbered active slots aligned at regular intervals, along with active and passive elements that are electromagnetically coupled via slots, and a feed line configured to reduce dielectric loss by forming a recess between the active elements and slots, improving radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If passive elements are added to reduce directivity difference, then directivity uniformity is improved, but device complexity increases
Solution Approach 1:
The patent introduces asymmetry by adding passive elements only to one end of the antenna array rather than symmetrically to both ends. This asymmetric configuration reduces the directivity difference between central and edge elements while avoiding the complexity of duplicating passive elements on both sides, thus resolving the contradiction between directivity uniformity and device complexity.
2Power
If more antenna elements are added to improve gain, then antenna gain is improved, but device complexity increases
Solution Approach 1:
The patent applies partial action by adding passive elements to only one end of the antenna array rather than uniformly across the entire array. This partial configuration provides sufficient gain improvement and directivity uniformity without the complexity of a fully symmetric multi-element structure, effectively resolving the contradiction between gain and device complexity.
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 significantly enhances the antenna's gain while maintaining low directivity and wide frequency applicability, as verified by simulation results.
Implementation Method 1
a feed line formed on a side opposite to the conductive ground layer with respect to the dielectric layer, the feed line configured to be electromagnetically coupled to the active elements via the active slots
Data Source
AI summary
To improve a gain of an antenna. An antenna 1 includes a dielectric layer 6, a conductive ground layer 7 bonded to the layer 6 and including active slots 7c-7f aligned at regular intervals, aligned active elements 9c-9f formed facing the active slots 7c-7f, respectively, first passive elements 9b, 9a aligned with and extending from one end of a row of the active elements 9c-9f, second passive elements 9g, 9h aligned with and extending from the other end of the row, a feed line 4a formed on a side opposite to the layer 7 with respect to the layer 6, to be electromagnetically coupled to the active elements 9c-9f via the active slots 7c-7f. The second passive elements 9g, 9h are arranged in line symmetry with the first passive elements 9b, 9a with respect to a line 9z passing through the center of the row and perpendicular to the row.