Coupled Antenna Conductor Layout for Isolation in Compact Electronics
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Solution Overview
Problem
Interference between multiple antennas in electronic devices is a challenge due to limited internal space, making it difficult to secure sufficient separation distance between antennas, and even coupler structures can cause interference.
Innovation Solution
The solution involves a conductive member electrically connected to an antenna radiator via a coupling, with a ground connected to a point between the feeding points of the conductive member, allowing for electromagnetic connection to a metal plate, thereby improving antenna efficiency and isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are disposed inside an electronic device to improve data processing speed and reliability, then communication performance is improved, but interference occurs between antennas due to insufficient separation distance
Solution Approach 1:
A ground structure is introduced as an intermediary element between multiple antennas to provide electromagnetic isolation. The ground acts as a mediator that blocks harmful electromagnetic interference between antennas while allowing the antennas to maintain close proximity for space efficiency.
Solution Approach 2:
The solution moves from considering only horizontal separation distance between antennas to utilizing the vertical dimension by positioning antennas at different heights and using ground planes at various levels to achieve isolation without increasing the horizontal footprint of the device.
2Reliability
If a coupler structure with larger volume is used to connect antennas, then coupling efficiency is improved, but interference occurs between electrical paths formed when wireless communication circuit feeds power to multiple feeding points
Solution Approach 1:
The coupler structure is divided into multiple isolated sections, each serving a specific feeding point. Ground structures are strategically placed to segment the electrical paths, ensuring that power fed to different feeding points does not create interfering electromagnetic fields while maintaining efficient coupling to the antenna.
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 configuration enhances antenna efficiency by allowing a coupler structure with a larger volume to be used effectively, while also securing isolation between antennas, even when power is fed to multiple points of the conductive member.
Implementation Method 1
a conductive member spaced apart from the antenna radiator in a first direction perpendicular to one surface of the antenna radiator and electrically connected to the antenna radiator via a coupling
Implementation Method 2
a ground electrically connected to a third point between the first point and the second point of the conductive member... the ground is electromagnetically connected to the metal plate in a coupling manner
Data Source
AI summary
An electronic device according to an embodiment may include an antenna radiator, a conductive member, a wireless communication circuit configured to feed power to a first point of the conductive member and a second point spaced apart from the first point, and a ground electrically connected to a third point between the first point and the second point of the conductive member, at least a portion of one region of the conductive member including the third point may overlap the antenna radiator, and the wireless communication circuit may be configured to transmit and/or receive a signal of a first frequency band based on a first electrical path formed by feeding power to the first point of the conductive member; and transmit and/or receive the signal of the first frequency band based on a second electrical path formed by feeding power to the second point of the conductive member.