Compact Antenna Design for Reduced Coupling in Mobile Terminals
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Summary
Problems
In mobile terminal antennas, strong mutual coupling between radiating elements reduces performance due to limited space, making it challenging to achieve both decoupling and efficient use of available space.
Innovation solutions
The design incorporates a closed ring connected to a ground plate, with radiating elements connected by microstrip to form a radiator, utilizing preset distances for orthogonal polarization and radiation pattern diversity to reduce coupling and enhance isolation.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the antenna size is reduced to meet terminal device constraints, then the device portability is improved, but the mutual coupling between antenna elements increases strongly
Why choose this principle:
A ground plate is introduced as an intermediary structure between antenna elements to reduce mutual coupling. The ground plate acts as a mediator that redistributes electromagnetic fields and reduces direct coupling between closely spaced antenna elements, enabling compact antenna design while maintaining performance
Principle concept:
If the antenna size is reduced to meet terminal device constraints, then the device portability is improved, but the mutual coupling between antenna elements increases strongly
Why choose this principle:
Multiple antenna elements are nested within a compact configuration on the ground plate, with each antenna element strategically positioned to maximize space utilization while minimizing coupling. The nested arrangement allows multiple functional elements to coexist in a limited volume
Application Domain
Data Source
AI summary:
The design incorporates a closed ring connected to a ground plate, with radiating elements connected by microstrip to form a radiator, utilizing preset distances for orthogonal polarization and radiation pattern diversity to reduce coupling and enhance isolation.
Abstract
The embodiments of this application disclose an antenna. The antenna includes a first radiating element, a second radiating element, a third radiating element, and a closed ring, where the first radiating element is connected to a first feed point, the second radiating element is connected to a second feed point, and the third radiating element is connected to a third feed point; the closed ring is configured to be disposed in a clearance area of a ground plate, and configured to connect to the ground plate; the first radiating element, the second radiating element, and the third radiating element are connected by using a microstrip, to form a radiator; the third radiating element is disposed between the first radiating element and the second radiating element; the first radiating element is disposed on a first side of the closed ring, the second radiating element is disposed on a second side of the closed ring, and the second side is opposite to the first side; and a first preset distance is set between the first radiating element and the third radiating element, and a second preset distance is set between the third radiating element and the second radiating element. The embodiments of this application further provide a mobile terminal.