Grounded Dual-Feed Antenna Structure for Adjacent Antenna Isolation
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Solution Overview
Problem
Conventional electronic devices face challenges in improving isolation between adjacent antennas due to the lack of space for isolator installation, which is exacerbated by the light and thin design trend, leading to signal interference.
Innovation Solution
The antenna structure incorporates a radiating element, first and second feeding elements, a grounding element, and a grounding branch, where the grounding element is located between the feeding elements, and the grounding branch connects with the second feeding portion, generating distinct radiation patterns to enhance isolation without the need for additional isolators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an isolator is placed between adjacent antennas to improve isolation, then signal interference is reduced, but the device occupies more space and becomes heavier
Solution Approach 1:
The patent extracts the isolation function from a separate physical isolator component and integrates it into the antenna structure itself through the grounding element and grounding branch configuration. The grounding element connected to the radiating element creates artificial radiation pattern differences that achieve isolation without requiring additional space for separate isolator components
Solution Approach 2:
The patent merges the isolation function with the antenna structure by integrating the grounding element and grounding branch into the existing antenna components. The grounding element connects to the radiating element and the grounding branch connects to the second feeding portion, combining structure and function to eliminate the need for separate isolators
2Weight of moving object
If the device is designed to be light and thin to improve portability, then device weight and thickness are reduced, but space for isolator installation becomes insufficient
Solution Approach 1:
The antenna structure serves itself by using its own grounding elements and feeding portions to create the isolation effect. The grounding element connected to the radiating element and the grounding branch connected to the second feeding portion work together to generate different radiation patterns, allowing the antenna system to achieve isolation through its inherent structure rather than requiring external isolator components
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 design effectively improves isolation between antennas by staggering radiation patterns, reducing signal interference, particularly in both low and high frequency bands, without requiring extra space for isolators.
Implementation Method 1
The first feeding element is used for feeding a signal to excite the radiating element to generate a first radiation pattern
Implementation Method 2
The second feeding element is used for feeding another signal to excite the radiating element to generate a second radiating pattern
Implementation Method 3
The grounding element is connected with the radiating element and is located between the first feeding element and the second feeding element. The grounding branch has a first end and a second end. The first end is connected with the second feeding portion, and the second end is connected with a ground plane
Data Source
AI summary
An antenna structure and an electronic device are provided. The electronic device includes a housing and an antenna structure disposed in the housing. The antenna structure includes a radiating element, a first feeding element with a first feeding portion connected to the radiating element, a second feeding element with a second feeding portion connected to the radiating element, a grounding element connected to the radiating element and located between the first feeding element and the second feeding element, and a grounding branch with a first end connected to the second feeding portion and a second end connected to a ground plane. The first feeding element and the second feeding element are used for feeding respective signals to excite the radiating element to respectively generate a first radiation pattern and a second radiation pattern. The first radiation pattern is different from the second radiation pattern.