Dual Antenna Isolation via Protruding Element
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Solution Overview
Problem
In wireless communication equipment, dual antennas face interference due to limited size, leading to reduced transmission efficiency, and existing solutions fail to effectively isolate antennas in compact designs.
Innovation Solution
A dual antenna device with a substrate and two antennas, where the antennas are positioned at an angle and an isolation element is used to create specific intervals and planes, enhancing isolation and adjusting radiation directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two antennas are provided for high band and low band respectively, then bandwidth coverage is improved, but antenna interference increases due to limited device size
Solution Approach 1:
The patent introduces a third dimension by making the isolation element protrude from the substrate to form a vertical reference plane. This spatial separation in the vertical dimension effectively isolates the two antennas that are horizontally arranged, reducing mutual interference while maintaining compact footprint on the substrate.
Solution Approach 2:
The isolation element acts as an intermediary structure between the first and second antennas. By positioning this element to form a vertical reference plane that separates the two antennas, it mediates the electromagnetic interaction between them, reducing coupling and interference effects.
2Productivity
If antenna isolation is enhanced using traditional methods, then transmission efficiency is improved, but device size increases
Solution Approach 1:
Instead of increasing horizontal separation distance between antennas, the patent utilizes the vertical dimension by making the isolation element protrude from the substrate. This approach achieves effective isolation without increasing the device's planar footprint, thus maintaining compact size while improving transmission efficiency.
Solution Approach 2:
The patent changes the geometric parameters of the isolation element, specifically its height and positioning, to optimize isolation performance. By adjusting these parameters, effective antenna isolation is achieved within a compact device envelope, improving transmission efficiency without proportionally increasing device volume.
Data Source
AI summary
A dual antenna device comprises a substrate, a first antenna, a second antenna and an isolation element. The substrate comprises an installation surface, the first antenna and the second antenna protrude from the installation surface and respectively couple to the installation surface by the first grounding edge and the second grounding edge. The isolation element comprises a first isolation portion protruding from the installation surface and coupling to the installation surface by a bottom side of the first isolation portion so that the first antenna and the second antenna respectively locate at both sides of the isolation element. The first antenna and the isolation element form a first interval in the extension direction of the first grounding edge. The second antenna and the isolation element form a second interval in the extension direction of the second grounding edge. The design of the isolation element improves the isolation magnitude.