Antenna Isolation via Shielding Element and Notch Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antenna systems in mobile devices suffer from poor isolation due to the close proximity of multiple antennas, leading to interference and compromised communication quality.
Innovation Solution
The proposed antenna system includes a first antenna, a second antenna, a third antenna, and an isolation metal element disposed between them, with the third antenna defining a notch region that the second antenna extends into, all mounted on a nonconductive support element, to reduce interference and enhance communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are disposed close to each other to satisfy limited interior space, then device compactness is improved, but antenna isolation deteriorates causing interference
Solution Approach 1:
An isolation metal element is introduced as an intermediary component positioned between the first antenna and the second antenna. This metal element acts as a shield that blocks electromagnetic interference between the two antennas, allowing them to be disposed close to each other while maintaining good isolation performance.
Solution Approach 2:
The antenna system utilizes three-dimensional spatial arrangement by extending antennas onto side surfaces of the nonconductive support element. The first antenna extends onto the first side surface, the second antenna extends onto the second side surface, and the isolation metal element extends onto the third side surface, creating vertical and lateral separation in multiple dimensions to reduce interference while saving planar space.
2Volume of moving object
If antennas are disposed close to each other, then space is saved, but communication quality deteriorates due to interference
Solution Approach 1:
The isolation metal element serves as a protective intermediary that shields the first antenna from interference generated by the second antenna. This metal shield maintains electromagnetic isolation between closely-spaced antennas, ensuring reliable communication quality across multiple frequency bands including LTE and GPS.
Solution Approach 2:
The patent applies different structural configurations to different antennas based on their specific requirements. The first antenna uses a coupled-fed structure with L-shaped and C-shaped radiation elements, while the second antenna is positioned to extend into the notch region. The isolation metal element is strategically placed only where needed to block interference paths, optimizing local electromagnetic environments for each antenna.
3Object-affected harmful factors
If the third antenna defines a notch region that the second antenna extends into, then isolation is improved, but device complexity increases
Solution Approach 1:
The third antenna is designed with an integrated notch region that directly accommodates the extension of the second antenna. This merging of the notch region into the third antenna's structure eliminates the need for separate isolation structures in that location, reducing overall device complexity while maintaining effective isolation through the controlled spatial relationship between the second and third antennas.
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 reduces interference between antennas, improving communication quality by preventing double-frequency noise from affecting the radiation performance, particularly in LTE and GPS frequency bands, and supports multiband operations like LTE, GPS, and Wi-Fi.
Implementation Method 1
an isolation metal element disposed between them
Implementation Method 2
all mounted on a nonconductive support element
Implementation Method 3
The first antenna includes a first radiation element and a second radiation element
Data Source
AI summary
An antenna system includes a first antenna, a second antenna, a third antenna, an isolation metal element, and a nonconductive support element. The isolation metal element is disposed between the first antenna and the second antenna. The third antenna defines a notch region. The second antenna at least partially extends into the notch region. The distance between the third antenna and the second antenna is from 1 mm to 10 mm. The first antenna, the second antenna, the third antenna, and the isolation metal element are all disposed on the nonconductive support element.