Stacked Antenna Module Layout for Multi-Band Resonance Control
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Solution Overview
Problem
Existing communication devices with multiple antennas for different frequency bands struggle to optimize antenna characteristics due to differing dielectric constants, leading to suboptimal frequency bandwidth and potential unwanted mode resonances.
Innovation Solution
A dielectric substrate with adjacent regions covered by dielectric layers of varying dielectric constants supports stacked radiating elements for different frequency bands, allowing individual adjustment of surface acoustic waves and minimizing arrangement area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single dielectric substrate is used for multiple frequency bands, then device complexity is reduced, but antenna characteristics cannot be optimized for all frequency bands
Solution Approach 1:
The patent applies local quality by providing different dielectric layers (first dielectric layer and second dielectric layer) with different dielectric constants over different regions of the same dielectric substrate. The first dielectric layer has a first dielectric constant optimized for the first frequency band, while the second dielectric layer has a second dielectric constant optimized for the second frequency band. This allows each frequency band to have locally optimized antenna characteristics while using a unified substrate structure.
2Adaptability or versatility
If different dielectric constants are used for different frequency bands, then antenna characteristics are optimized, but arrangement area increases
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked structure by placing the first dielectric layer and second dielectric layer at different heights above the dielectric substrate. The first radiating element is positioned between the first dielectric layer and the substrate, while the second radiating element is positioned between the second dielectric layer and the substrate. This vertical stacking allows multiple frequency bands to be accommodated in a compact footprint area.
Solution Approach 2:
The patent implements nesting by placing the first radiating element and second radiating element in overlapping positions when viewed from above, with each radiating element nested within its respective dielectric layer's coverage area. The first dielectric layer covers a first region containing the first radiating element, and the second dielectric layer covers a second region containing the second radiating element, with these regions partially overlapping. This nested arrangement minimizes the total arrangement area while maintaining distinct optimized regions for each frequency band.
3Adaptability or versatility
If dielectric layers are added for each frequency band, then frequency bandwidth is enhanced, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the dielectric substrate and dielectric layers to serve multiple functions simultaneously. The dielectric substrate provides mechanical support and electrical isolation for all radiating elements. The first dielectric layer and second dielectric layer not only provide frequency-specific impedance matching and resonance control but also collectively form part of the overall antenna radiation structure. This multi-functional design enhances frequency bandwidth while limiting unnecessary 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 enhances frequency bandwidth and suppresses unwanted mode resonances, achieving broadband antenna characteristics for each radiating element while maintaining a compact design.
Implementation Method 1
by individually adjusting surface acoustic waves for the radiating elements
Implementation Method 2
A dielectric constant of the first dielectric layer and a dielectric constant of the second dielectric layer are higher than a dielectric constant of the dielectric substrate
Data Source
AI summary
An antenna module includes a dielectric substrate that has an upper surface and a lower surface; radiating elements that have a flat-plate shape; and dielectric layers. The radiating elements are arranged in the dielectric substrate and can radiate respective radio waves in mutually-different frequency bands. The dielectric layer is arranged in a manner to cover a first region in which the radiating element is arranged. The dielectric layer is arranged in a manner to cover a second region in which the radiating element is arranged. Dielectric constants of the dielectric layers are higher than a dielectric constant of the dielectric substrate. The first region and the second region are adjacent to each other. The radiating element overlaps with the radiating element or the radiating element in plan view in a normal direction of the dielectric.