Multi-band Antenna Module 3D Casing Structure
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Solution Overview
Problem
Conventional multi-band antennas occupy significant internal space in electronic devices due to their planar form, making it difficult to reduce the size of these products as they evolve towards thinner and smaller designs.
Innovation Solution
A multi-band antenna module is designed to be disposed along the outline of a casing, forming a 3D structure with multiple radiators (main, first, second, and fourth) that couple different frequency bands, utilizing a feed-in terminal and ground terminals strategically located on the casing's surfaces to save space and avoid interference from internal metal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-band antenna is disposed on a substrate in a planar form, then the antenna can couple multiple frequency bands, but it occupies a relatively large internal space of the electronic product
Solution Approach 1:
The patent transitions the antenna structure from a two-dimensional planar form to a three-dimensional configuration by extending radiators along the outline of the casing. The main radiator and multiple frequency-specific radiators are arranged in 3D space, utilizing vertical and lateral dimensions to achieve multi-band coupling while reducing the footprint area occupied on the substrate.
Solution Approach 2:
The antenna design nests multiple radiators of different frequencies within the outline of a single casing. The main radiator serves as a base structure, and additional radiators (first, second, third, and fourth radiators) are integrated along the casing outline, with some radiators positioned on different surfaces and orientations, creating a nested hierarchical arrangement that maximizes space utilization.
2Volume of moving object
If the antenna module is reduced in size to meet thin and small electronic product requirements, then the product size is reduced, but the antenna's frequency coupling capability and efficiency deteriorate
Solution Approach 1:
Different radiators are designed with specific local characteristics optimized for their respective frequency bands. The main radiator provides broad coverage, while the first, second, third, and fourth radiators are specifically configured (with different lengths, positions, and orientations) to optimize coupling for particular frequency ranges, ensuring each portion of the antenna system performs its specialized function efficiently within the compact 3D structure.
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
The 3D configuration effectively reduces the space occupied by the antenna module while maintaining efficient frequency coupling across multiple bands, with the option of a variable capacitor for impedance matching and frequency adjustment, enhancing antenna efficiency and adaptability to various frequency specifications.
Implementation Method 1
The first radiator has an end portion connected to the main radiator, the first radiator has a first widened section, a second widened section and a third widened section which are adapted to be located on three of these lateral surfaces respectively, and widths of the first widened section, the second widened section and the third widened section are larger than a width of the end portion
Data Source
AI summary
A multi-band antenna module is adapted to be disposed on a casing. The multi-band antenna module includes a main radiator, and a first, a second, a third and a fourth radiator. The main radiator has a feed-in terminal and a first ground terminal. The first radiator is connected to the main radiator and configured to couple a first frequency band. The second radiator is connected to the main radiator and configured to couple a second frequency band. The third radiator is connected to the main radiator and configured to couple a third frequency band. The fourth radiator is located beside the main radiator and configured to couple a fourth frequency band and has a second ground terminal. The main radiator, the first radiator, the second radiator, the third radiator and the fourth radiator are adapted to form a 3D structure along an outline of the casing.