Antenna Module Stacked Power Feed Elements
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Solution Overview
Problem
Existing antenna modules with stacked configurations face challenges in maintaining antenna characteristics due to insufficient size of the ground electrode, leading to suboptimal performance for radio waves in different frequency bands.
Innovation Solution
The antenna module incorporates a configuration where the first and second power feed elements are arranged with overlapping polarization directions, forming an angle greater than 0° and less than 90°, allowing for a longer distance between their end portions, thereby enhancing electromagnetic coupling and suppressing the deterioration of antenna characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the ground electrode size is reduced to meet substrate size constraints, then the device can be miniaturized, but antenna characteristics deteriorate
Solution Approach 1:
The patent transitions from a conventional planar ground electrode layout to a three-dimensional stacked configuration. By arranging the first and second electrodes in different layers with vertical separation, the design effectively increases the electromagnetic coupling distance without increasing the substrate footprint. This dimensional change allows maintaining adequate electrode sizing for good antenna characteristics while meeting miniaturization requirements.
2Speed
If the second electrode size is reduced to accommodate higher frequency operation, then the antenna can operate at higher frequencies, but sufficient electromagnetic coupling is not achieved
Solution Approach 1:
The patent uses vertical layering to separate the first and second electrodes in the thickness direction. This allows the second electrode to be sized appropriately for high-frequency operation while maintaining sufficient coupling through controlled vertical positioning. The stacking configuration enables independent sizing optimization for each frequency band without planar space constraints.
Solution Approach 2:
The dielectric substrate acts as an intermediary medium between the first and second electrodes. By controlling the dielectric properties and thickness of the substrate, the design enables sufficient electromagnetic coupling between electrodes of optimized sizes for their respective frequency bands, resolving the contradiction between frequency and coupling strength.
3Speed
If the first electrode size is reduced for high-frequency operation, then the antenna can radiate at higher frequencies, but the ground electrode becomes insufficiently large
Solution Approach 1:
The patent resolves the area constraint by moving the ground electrode relationship into the vertical dimension. The first electrode can be smaller for high-frequency operation while the first ground electrode maintains adequate area in its own layer. The stacked configuration allows each electrode-ground pair to be independently sized for their optimal performance without planar overlap 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 expands the frequency band width and improves antenna characteristics by securing stronger electromagnetic coupling and electrostatic capacity, even with limited ground electrode sizes.
Implementation Method 1
the first electrode operates as an antenna by electromagnetic field coupling between the first electrode and the second electrode
Implementation Method 2
securing stronger electromagnetic coupling and electrostatic capacity
Data Source
AI summary
An antenna module includes a first power feed element and a second power feed element each having a flat plate shape, and a ground electrode (GND) arranged so as to face the first power feed element and the second power feed element. The first power feed element is configured to radiate a radio wave having a first direction as a polarization direction. The second power feed element is arranged between the first power feed element and the ground electrode (GND), and is configured to radiate a radio wave having a second direction as a polarization direction. A frequency of the radio wave radiated from the first power feed element is higher than a frequency of the radio wave radiated from the second power feed element. An angle formed by the first direction and the second direction is greater than 0° and less than 90°.