Dual-Polarized Millimeter Wave Antenna Array With Reduced Module Width
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Solution Overview
Problem
Current millimeter wave modules for electronic devices face challenges in efficiently transmitting and receiving millimeter wave signals over a wide frequency band, particularly in reducing the dimension of the module in non-scanning directions while maintaining dual-polarization capabilities.
Innovation Solution
The millimeter wave module incorporates an antenna substrate with dual-polarized antenna array elements that radiate millimeter wave signals in different modes depending on the direction of feeding, utilizing a patch radiation mode in one direction and a substrate integrated waveguide radiation mode in another, allowing for reduced dimensions without compromising dual-polarization performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single-radiation-mode antenna elements are used, then the antenna structure is simple, but dual-polarization capabilities cannot be achieved
Solution Approach 1:
The antenna element is designed to perform multiple radiation functions through a single structure. By configuring the antenna element with specific geometric parameters (such as rectangular patch with controlled dimensions and substrate integration), it can radiate in both TM and TE modes simultaneously, achieving dual-polarization capability without requiring separate antenna elements for each polarization mode.
Solution Approach 2:
The patent utilizes parameter optimization of the antenna substrate and radiating element geometry to enable dual-radiation-mode functionality. By adjusting parameters such as substrate thickness, patch dimensions, and feed positions, the antenna element achieves resonant frequencies and radiation patterns corresponding to both TM and TE modes, thereby obtaining dual-polarization capability through parameter control rather than structural complexity.
2Adaptability or versatility
If square-shaped antenna substrate is used to achieve dual-polarization, then dual-polarization capability is obtained, but the module dimension increases
Solution Approach 1:
The patent employs asymmetric rectangular patch antenna elements on the substrate instead of symmetric square configurations. The rectangular patch with specific length-to-width ratios enables different resonant characteristics along orthogonal directions, allowing dual-polarization capability to be achieved with a non-square substrate footprint, thereby reducing the overall module area while maintaining adaptability.
3Area of stationary object
If antenna element dimensions are reduced to minimize module size, then module dimension is reduced, but radiation performance deteriorates
Solution Approach 1:
The patent transitions from planar two-dimensional antenna designs to three-dimensional substrate-integrated structures. By utilizing the vertical dimension through substrate integration and controlling the gap between the radiating patch and ground plane, the antenna achieves enhanced radiation performance in a compact footprint. The third dimension (substrate thickness and gap control) provides additional degrees of freedom for optimizing radiation characteristics without increasing the module's planar dimensions.
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 enables the millimeter wave module to achieve dual-polarization capabilities without requiring a square shape, reducing the module's dimension in non-scanning directions and enhancing radiation performance by adjusting the antenna substrate's parameters.
Implementation Method 1
at least one of the dual-polarized antenna array elements is configured to the radiate millimeter wave signal in a first radiation mode when being fed in the first direction, and radiate the millimeter wave signal in a second radiation mode when being fed in the second direction
Implementation Method 2
radiate the millimeter wave signal in a second radiation mode when being fed in the second direction
Data Source
AI summary
A millimeter wave module and an electronic device are provided herein. The millimeter wave module includes an antenna substrate and an antenna array. The antenna substrate has a first direction and a second direction perpendicular to each other. The antenna array is located on the antenna substrate. The antenna array includes a plurality of dual-polarized antenna array elements for radiating millimeter wave signal. At least one of the dual-polarized antenna array elements is configured to the radiate millimeter wave signal in a first radiation mode when being fed in the first direction, and radiate the millimeter wave signal in a second radiation mode when being fed in the second direction.