Planar Tri-Band Antenna Module for Compact PCB Integration
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Solution Overview
Problem
Traditional tri-band antennas are large, complex, and costly, with high assembly risks and deformation issues, making them unsuitable for miniaturized electronic products.
Innovation Solution
A tri-band antenna module with a substrate, radiators, and a short-circuit structure, featuring symmetrical or asymmetric designs for multiple frequency bands, allowing for easy adjustment and assembly on a printed circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional three-dimensional tri-band antenna is used, then three resonant modes covering broader bandwidth can be achieved, but the antenna takes up large space and has complex structure
Solution Approach 1:
The patent transitions from a three-dimensional antenna structure to a two-dimensional planar configuration. The antenna is integrated onto a PCB board with radiating elements arranged in specific geometric patterns (such as cross-shaped, U-shaped, or L-shaped configurations) that enable triple-band operation within a flat plane, eliminating the need for bulky three-dimensional structures while maintaining broadband coverage capability
Solution Approach 2:
The antenna is divided into multiple independent radiating elements or segments that can be separately designed and optimized for different frequency bands. These segmented elements are arranged in specific spatial relationships on the PCB, allowing each segment to contribute to different resonant frequencies while collectively providing triple-band operation, thus reducing overall complexity and size
2Adaptability or versatility
If a traditional three-dimensional tri-band antenna is used, then three resonant modes can be achieved, but the structure is complex and costly to mold and assemble
Solution Approach 1:
The antenna structure is merged with the PCB board itself, eliminating the need for separate three-dimensional antenna components. The radiating elements are directly fabricated on the PCB using standard PCB manufacturing techniques, integrating the antenna function into the existing circuit board structure. This merging approach simplifies the overall device structure, reduces assembly steps, and lowers manufacturing costs while maintaining triple-band operational capability
Solution Approach 2:
The patent replaces complex mechanical three-dimensional antenna structures with planar electromagnetic patterns fabricated on PCB. Instead of using molded plastic or metal three-dimensional forms that require complex assembly, the antenna is created through PCB trace patterns and ground plane configurations, substituting mechanical complexity with electrical circuit design simplicity
3Adaptability or versatility
If a traditional three-dimensional tri-band antenna is used, then three resonant modes can be achieved, but the antenna is prone to deformation
Solution Approach 1:
By transitioning from three-dimensional to two-dimensional planar configuration, the antenna structure is constrained to a rigid PCB substrate that provides inherent structural support. This dimensional reduction eliminates the susceptibility to deformation that plagues three-dimensional antennas, as the planar elements are firmly attached to the rigid PCB board and cannot easily bend or warp during assembly or operation
4Adaptability or versatility
If a traditional three-dimensional tri-band antenna is used, then three resonant modes can be achieved, but frequency adjustment is difficult
Solution Approach 1:
The patent incorporates adjustable and reconfigurable elements into the PCB antenna design, such as variable capacitors, inductors, or switchable trace configurations that allow dynamic adjustment of resonant frequencies. These dynamic components enable frequency tuning and optimization without requiring physical restructuring of the antenna, making frequency adjustment simple and flexible while maintaining triple-band operational capability
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 module supports multiple frequency bands with low return loss and high radiation efficiency, reducing manufacturing costs and deformation risks while enabling flexible frequency adjustments.
Implementation Method 1
the first radiator is configured to radiate a first electromagnetic wave in a first direction, the second radiator is configured to radiate a second electromagnetic wave in a second direction, where the first direction is opposite to the second direction
Data Source
AI summary
A tri-band antenna module includes a substrate, a first radiator, a second radiator, and a short-circuit structure. The substrate has a signal feed-in terminal and a ground terminal. The signal feed-in terminal is connected to the first radiator, and the ground terminal is connected to the second radiator. The first radiator includes a first extension block and a second extension block, and the second radiator includes a third extension block and a fourth extension block. The first extension block and the second extension block are separated by a first interval, and the third extension block and the fourth extension block are separated by a second interval. The short-circuit structure is connected between the first extension block and the third extension block, and the short-circuit structure is respectively separated from the first extension block and the third extension block by a first slot and a second slot.