Miniaturized Broadband Antenna Structure for Multi-Band Wi-Fi
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Solution Overview
Problem
Existing antennas face challenges in miniaturization while maintaining the ability to support multiple working frequency bands, which is essential for smaller wireless devices.
Innovation Solution
The antenna design includes a dielectric substrate with a first radiation unit and a second radiation unit that extends from the second surface to the first surface, forming a first radiation portion and a ground portion. This configuration allows for the excitation of multiple frequency bands without the need for additional feeding portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to fit smaller wireless devices, then the device size is reduced, but the bandwidth and ability to support multiple working bands deteriorates
Solution Approach 1:
The patent utilizes the thickness dimension of the dielectric substrate to extend the second radiation unit from the second surface to the first surface, creating a three-dimensional radiation structure. This vertical extension enables the antenna to support multiple frequency bands (2.4GHz and 5GHz) within a compact footprint, resolving the contradiction between miniaturization and bandwidth by exploiting the third dimension rather than relying solely on planar expansion.
Solution Approach 2:
The antenna is divided into distinct radiation units with specialized functions: the first radiation unit on the first surface for one frequency band, and the second radiation unit extending through the substrate for another frequency band. This segmentation allows each unit to be optimized for specific frequency ranges, enabling multi-band operation without requiring a large overall antenna structure.
2Adaptability or versatility
If multiple radiation units are added to support multiple frequency bands, then the bandwidth is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple radiation units and the ground portion into a single integrated antenna structure formed on one dielectric substrate. The first and second radiation units share the same substrate and are coupled through the substrate thickness, eliminating the need for separate antenna assemblies or additional feeding portions. This merging achieves multi-band support while maintaining structural simplicity.
Solution Approach 2:
The dielectric substrate serves multiple functions simultaneously: it provides mechanical support, acts as an insulator, and enables coupling between radiation units at different frequencies. The single substrate structure supports both the first radiation unit for 5GHz operation and the second radiation unit for 2.4GHz operation, making the antenna structure universal for multi-band wireless communication.
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 antenna achieves miniaturization while providing broadband connections by stimulating multiple working frequency bands, thus supporting advanced Wi-Fi standards like Wi-Fi 7 with faster network speeds.
Implementation Method 1
the first radiation unit excites a first radiation frequency band, the current flowing through the first radiation unit is further coupled and fed into the first radiation portion, and the first radiation portion excites a second radiation frequency band
Data Source
AI summary
A miniaturized antenna with broadband capabilities includes a dielectric substrate, a first radiation unit, a second radiation unit and a feed portion. The dielectric substrate includes a first surface and a second surface. The first radiation unit is arranged on the first surface, the second radiation unit extends from the second surface to the first surface, the second radiation unit includes a ground portion and a first radiation portion. The feed portion feeds current to the first radiation unit, the first radiation unit excites a first radiation frequency band, and the first radiation portion excites a second radiation frequency band. The disclosure also provides a wireless communication device. The antenna is miniaturized and achieves broadband capabilities.