Dual-Polarized Antenna Module Layout for Gain-Bandwidth Balance
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Solution Overview
Problem
Existing antenna modules face a trade-off between high Q value for antenna gain and low Q value for frequency bandwidth, making it difficult to achieve both simultaneously, especially when peripheral electrodes are used.
Innovation Solution
The antenna module design includes a dielectric substrate with a radiating element, a peripheral electrode, and a parasitic element disposed away from the radiating element, adjusting electromagnetic field coupling to balance antenna gain and frequency bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between the radiating element and peripheral electrodes is reduced to increase Q value and antenna gain, then the antenna gain is maintained, but the frequency bandwidth decreases
Solution Approach 1:
The antenna module divides the electrode structure into two distinct functional components: peripheral electrodes for gain enhancement and parasitic elements for bandwidth expansion. This segmentation allows each component to independently contribute to different performance aspects without compromising the other.
Solution Approach 2:
Parasitic elements act as intermediary components that couple with the radiating element to expand frequency bandwidth, while peripheral electrodes serve as intermediaries to enhance antenna gain by reducing backside radiation. This mediator approach resolves the contradiction by introducing additional elements that perform specific functions.
2Reliability
If peripheral electrodes are added to suppress backside radiation and maintain antenna gain, then the antenna gain is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated electrode structures: peripheral electrodes serve both as radiation suppression elements and as part of the overall antenna structure, while parasitic elements simultaneously contribute to bandwidth expansion and structural symmetry. This merging reduces the need for separate components.
Solution Approach 2:
The peripheral electrodes and parasitic elements are designed to perform multiple functions: peripheral electrodes provide both radiation suppression and structural support, while parasitic elements contribute to bandwidth expansion, structural symmetry, and electromagnetic field distribution. This multi-functionality reduces overall 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 enhances frequency bandwidth while maintaining antenna gain by optimizing the coupling between the radiating element and parasitic element, reducing electromagnetic field coupling and adjusting resonant frequencies.
Implementation Method 1
The radiating element is configured to emit radio waves in a first polarization direction along the long side of the dielectric substrate and a second polarization direction along the short side of the dielectric substrate
Implementation Method 2
The electromagnetic field coupling between the radiating element and the peripheral electrode can be adjusted by disposing the parasitic element further away from the radiating element than the peripheral electrode
Data Source
AI summary
An antenna module including a dielectric substrate having a long side and a short side, a ground electrode, a radiating element, a peripheral electrode, and a parasitic element. The radiating element is disposed to face the ground electrode. The peripheral electrode is disposed along the long side of the dielectric substrate and is electrically connected to the ground electrode. The parasitic element is disposed along the short side of the dielectric substrate and is disposed away from the radiating element. The radiating element is configured to emit radio waves in two polarization directions along the long side and the short side of the dielectric substrate. The shortest distance between the radiating element and the parasitic element is greater than the shortest distance between the radiating element and the peripheral electrode.