Multi-Antenna System Isolation via Segmented Ground Plates
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Solution Overview
Problem
In mobile communication terminals, single antennas struggle to maintain performance in complex environments due to mutual interference and electromagnetic interference, limiting the integration of multiple antennas in a small space and affecting communication quality.
Innovation Solution
A multi-antenna system utilizing two metal ground plates and two dielectric substrates with four PIFA antennas and isolated branch knots, which are symmetrical and connected via probe-type feeder lines and metal shorting pins, to enhance isolation and increase antenna density in a limited space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple antennas are integrated in a limited space, then antenna density increases, but mutual interference and electromagnetic interference increase
Solution Approach 1:
The patent divides the ground plane into multiple independent ground plates, each serving specific antenna elements. This segmentation isolates the electromagnetic fields of different antennas, reducing mutual interference while maintaining high antenna density in limited space.
Solution Approach 2:
The patent applies different ground plate configurations and isolation structures to different spatial locations. By optimizing the local electromagnetic environment for each antenna group, the system achieves high density without uniform interference across all antenna elements.
2Quantity of substance
If multiple antennas are integrated in a limited space, then antenna density increases, but electromagnetic compatibility deteriorates
Solution Approach 1:
The ground plane is segmented into multiple independent ground plates with specific isolation distances, creating separate electromagnetic zones for different antenna elements. This segmentation maintains electromagnetic compatibility while enabling high antenna density integration.
Solution Approach 2:
Isolation structures including air gaps and dielectric materials are introduced between ground plates and antenna elements. These intermediary elements act as electromagnetic barriers, preventing interference while allowing compact antenna integration.
3Quantity of substance
If multiple antennas are integrated in a limited space, then antenna density increases, but antenna efficiency decreases
Solution Approach 1:
The patent segments the grounding system into multiple independent ground plates, each providing dedicated electromagnetic support for specific antenna elements. This segmentation reduces mutual coupling and maintains high antenna efficiency despite increased density.
Solution Approach 2:
The patent utilizes the vertical dimension by stacking ground plates at different heights and using three-dimensional isolation structures. This dimensional approach enables high antenna density while maintaining efficiency by separating antennas in the vertical space rather than only horizontal plane.
Data Source
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AI summary
Provided are a multi-antenna system and a mobile terminal. A dual band is achieved through PIFA antennas on dielectric substrates and grooves on radiation patches of the antennas. The isolation degree between the antennas is improved by arranging an isolated branch knot between the antennas. The isolation degree between the antennas on the two medium substrates is further improved through the two independent medium substrates and a metal ground. In addition, the PIFA antennas are used, so that the multi-antenna system and the mobile terminal can increase the number of antennas in a limited space as many as possible.