Mobile Terminal Antenna Interference Reduction via Grounding Mediator
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Solution Overview
Problem
Mobile terminals face interference issues between antennas due to their proximity, which affects antenna performance, especially in minimizing bezel size for larger display units and diverse wireless communication functions.
Innovation Solution
The mobile terminal design includes a metal bracket with conductive patterns and grounding portions strategically arranged to minimize interference between antennas, utilizing a side frame connected to a middle frame and conductive patterns on the rear case to manage current flow and reduce electromagnetic interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are provided for diverse wireless communication functions, then wireless communication capability is improved, but interference between antennas increases
Solution Approach 1:
A first grounding portion is introduced as an intermediary element between the first feeding portion (main antenna) and the second feeding portion (sub-antenna). This grounding portion is connected to both feeding portions and to the side frame, serving as a mediator to separate and control the current paths of the two antennas, thereby reducing their mutual interference while allowing both to function simultaneously.
2Area of stationary object
If antennas are placed closer together to minimize bezel size, then device compactness is improved, but antenna performance deteriorates
Solution Approach 1:
The first grounding portion acts as a mediator that enables close placement of antennas by separating their current paths. By connecting both feeding portions to a common grounding structure (the side frame via the first grounding portion), the patent allows antennas to be positioned closer together without significant interference, thus maintaining compact bezel size while preserving antenna performance.
Solution Approach 2:
The patent controls the position and connection characteristics of the first grounding portion to optimize current distribution. By strategically positioning the grounding portion and its connections to the side frame, the patent modifies the electrical parameters (current flow paths, impedance) to reduce interference between closely spaced antennas, thereby maintaining performance in a compact form factor.
Data Source
AI summary
There is disclosed a mobile terminal including a display unit; a metal bracket comprising a middle frame provided in a rear surface of the display unit; and a side frame partially distant from the middle frame and configured to define a lateral surface; a main board loaded in a rear surface of the bracket; a rear case configured to cover the main board and define an external appearance of a rear surface; and a first conductive pattern formed in an inner surface of the rear case, wherein the main board comprises a first feeding portion connected with the side frame; a second feeding portion connected with the first conductive pattern; and a first grounding portion connected with the side frame and the first conductive pattern and located between the first feeding portion and the second feeding portion.