Broadband Antenna Radiator Layout Using Gaps and Asymmetric Feed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic device antennas face challenges in meeting broadband requirements due to their small size and design complexity, which affects performance and increases costs.
Innovation Solution
The design incorporates multiple radiators with strategically placed gaps and feed points to excite both CM and DM modes, allowing for multi-order resonances and expanded bandwidth through overlapping resonant frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the antenna size is reduced to meet industrial design requirements, then the device form factor is improved, but the bandwidth and radiation performance of the antenna deteriorates
Solution Approach 1:
The antenna is divided into multiple radiators (first radiator, second radiator, third radiator) with gaps between them. This segmentation allows each radiator to contribute to different resonance modes, enabling broadband operation from a compact overall structure. The gaps between radiators create capacitive coupling that enhances the bandwidth while maintaining a small form factor.
2Adaptability or versatility
If auxiliary means such as switches, sensors, and circuits are added to improve antenna performance, then the frequency band coverage is improved, but the system complexity increases
Solution Approach 1:
The patent combines multiple radiators into a single integrated antenna structure that supports multiple frequency bands simultaneously. By using a unified design with multiple radiators and gaps, the antenna achieves multi-band coverage without requiring separate switching circuits, sensors, or control algorithms, thus reducing system complexity while maintaining versatility.
3Ease of manufacture
If the feed point is positioned at the central region, then the ground point placement is simplified, but the ability to excite both CM and DM modes is reduced
Solution Approach 1:
The feed point is deliberately positioned asymmetrically between the central region and the first end of the first radiator, rather than at the exact center. This asymmetric positioning enables simultaneous excitation of both common-mode (CM) and differential-mode (DM) resonances, enhancing the antenna's adaptability for multiple frequency bands while maintaining a relatively simple ground point placement in the central region.
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 radiation characteristics and gain by increasing symmetry, simplifying the antenna structure, and expanding the operating bandwidth to support multiple communication frequency bands efficiently.
Implementation Method 1
When an electrical signal is fed at the feed point, the first radiator, the second radiator, and the third radiator jointly generate at least one resonance
Data Source
AI summary
An electronic device includes a radiator, a feed point, and a ground point. The plurality of radiators include a first radiator, a second radiator, and a third radiator. A first end of the first radiator and a first end of the second radiator are opposite to each other, and form a first gap. A second end of the first radiator and a first end of the third radiator are opposite to each other, and form a second gap. The feed point and the ground point are disposed on the first radiator. The ground point is disposed in a central region of the plurality of radiators or the first radiator, and the feed point is disposed between the central region and the first end of the first radiator. Gaps are formed between a plurality of radiators, so that a broadband antenna can be implemented.