Coupled Low-Profile Antenna Structure for High-Frequency Bandwidth
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Solution Overview
Problem
Electronic devices face a challenge in achieving high communication quality due to the low profile antenna structure design, which results in a significant shortage of bandwidth, especially at high frequencies.
Innovation Solution
The antenna structure incorporates a first radiating member, a second radiating member, a grounding member, and a capacitance element, with specific electrical connections and lengths that allow the third radiating part of the second radiating member and the second radiating part of the first radiating member to be separate and coupling, enabling an operating frequency band from 1710 MHz to 2690 MHz in compliance with a gain specification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna structure is designed with a low profile height, then the device can achieve a lighter design and thinner appearance, but the bandwidth is significantly shortened, especially at high frequencies
Solution Approach 1:
The antenna is divided into multiple radiating members (first radiating member with first and second radiating parts, and second radiating member with third radiating part), each segment contributing to different frequency ranges. This segmentation allows the low-profile antenna to achieve broader bandwidth by combining the radiating characteristics of multiple separated elements, resolving the contradiction between compact height and sufficient bandwidth.
Solution Approach 2:
The patent utilizes vertical stacking of multiple radiating members at different heights above the grounding member, transitioning from a single-plane to a multi-layer three-dimensional structure. This dimensional change enables the antenna to maintain low overall profile while achieving extended bandwidth through the combined radiation patterns of elements at different vertical positions.
2Adaptability or versatility
If the antenna structure uses separate and coupling configuration between radiating parts, then the high frequency bandwidth is enhanced, but the device complexity increases
Solution Approach 1:
The patent combines multiple radiating members with different electrical lengths into a single integrated antenna assembly that functions as one unified structure. The first and second radiating members are positioned in close proximity with coupling relationships, merging their radiating functions to achieve broad bandwidth coverage from 1710 MHz to 2690 MHz while maintaining a cohesive structural design.
Solution Approach 2:
Each radiating member is designed to serve multiple functions: the first radiating member covers lower frequency ranges while the second radiating member with longer electrical length extends coverage to higher frequencies. The coupling between radiating parts enables universal operation across the entire desired bandwidth, reducing the need for separate antenna systems for different frequency bands.
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 the antenna's high frequency bandwidth and impedance matching, overcoming noise interference and achieving a high-pass filtering effect, thereby improving communication quality.
Implementation Method 1
a capacitance element is connected between the second radiating member and the grounding member
Data Source
AI summary
An antenna structure and an electronic device are provided. The antenna structure includes a first radiating member, a second radiating member, a grounding member, and a capacitance element. The first radiating member includes a first radiating part, a second radiating part, a feeding part, and a grounding part. The second radiating member is coupling to the first radiating member. The second radiating member includes a third radiating part and a main body part that are connected to each other. There is a first predetermined length between a feeding point of the feeding part and an open end of the second radiating part. There is an electrical length between a connection point where the main body part is electrically connected to the capacitance element and an open end of the third radiating part. The electrical length is greater than the first predetermined length.