Antenna Module Layout for Symmetric Electric Field Control
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Solution Overview
Problem
Existing antenna devices face challenges in maintaining satisfactory antenna characteristics due to restricted size and shape of the ground electrode, leading to turbulence of electric lines of force and potential deterioration in gain, frequency band, or directivity, especially in compact portable terminals.
Innovation Solution
The antenna module incorporates a dielectric substrate with laminated dielectric layers, radiation elements, and peripheral electrodes symmetrically positioned with respect to the polarization direction, which are electrically connected to the ground electrode to homogenize electric lines of force and improve antenna characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna device is placed in a restricted narrow region, then the device size is reduced, but the ground electrode area becomes insufficient
Solution Approach 1:
The invention introduces a third dimension by stacking multiple ground electrodes at different heights (first ground electrode at first height, second ground electrode at second height) rather than expanding the ground electrode area in the same plane. This vertical arrangement allows the antenna device to maintain compact horizontal dimensions while providing sufficient total ground electrode area through multi-layer configuration.
Solution Approach 2:
The ground electrode function is segmented into multiple separate ground electrodes positioned at different heights and locations. Instead of requiring one large ground electrode, the invention divides the grounding function across multiple smaller electrodes (first ground electrode and second ground electrode), each contributing to the overall electromagnetic field coupling and providing adequate total area in a compact space.
2Shape
If the ground electrode area is restricted, then the device fits in narrow regions, but electric lines of force become turbulent
Solution Approach 1:
By arranging ground electrodes at different heights (vertical dimension) rather than only in the horizontal plane, the invention creates more uniform three-dimensional electric field distribution. The first ground electrode at first height and second ground electrode at second height work together to stabilize electric lines of force, preventing turbulence that would occur with restricted two-dimensional ground electrode area.
Solution Approach 2:
The invention applies different ground electrode configurations at different locations and heights to optimize local electric field conditions. The first ground electrode and second ground electrode are positioned to address specific local field distribution needs, ensuring uniform electric lines of force throughout the three-dimensional space around the radiation element.
3Adaptability or versatility
If the ground electrode shape is asymmetric due to installation constraints, then the antenna can be installed in various positions, but antenna characteristics such as gain and directivity deteriorate
Solution Approach 1:
The invention compensates for asymmetric ground electrode shapes by introducing vertical layering. Even when the horizontal arrangement of ground electrodes must be asymmetric due to installation constraints, the addition of multiple ground electrodes at different heights (first height and second height) restores symmetry to the overall electromagnetic field distribution, maintaining antenna characteristics like gain and directivity.
Solution Approach 2:
The invention combines multiple ground electrodes (first ground electrode and second ground electrode) at different heights to create a unified electromagnetic field environment. This merging of multiple grounding elements at different vertical positions effectively compensates for the asymmetric shape of individual ground electrodes, ensuring stable antenna performance regardless of installation position constraints.
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 suppresses the deterioration of antenna characteristics by ensuring symmetrical electric field distribution and improved coupling between radiation elements and the ground electrode, even under size and shape restrictions, enhancing gain and frequency band performance.
Implementation Method 1
radio waves are radiated by way of electromagnetic field coupling between the radiation elements and the ground electrode
Implementation Method 2
The peripheral electrodes are symmetrically positioned with respect to at least one of a first direction parallel to the first polarization direction or a second direction orthogonal to the first polarization direction
Data Source
AI summary
An antenna module includes a dielectric substrate including a plurality of dielectric layers that are laminated, and a radiation element, a ground electrode, and peripheral electrodes that are formed in or on the dielectric substrate. The radiation element radiates radio waves in a first polarization direction. The ground electrode is placed so as to face the radiation element. The peripheral electrodes are formed in a plurality of layers between the radiation element and the ground electrode and are electrically connected to the ground electrode. The peripheral electrodes are placed at positions that are symmetrical with respect to at least either of a first direction parallel to the first polarization direction and a second direction orthogonal to the first polarization direction.