MIMO Antenna Ground Pad Isolation
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Solution Overview
Problem
In MIMO antenna apparatuses, electromagnetic coupling between antenna devices occurs due to size reduction, leading to performance deterioration in wireless communication systems.
Innovation Solution
A MIMO antenna apparatus design featuring a main board with a ground plate and ground pads that separate antenna devices by a predetermined distance, along with feeding pads for power supply, to suppress electromagnetic coupling by ensuring identical amplitudes and differing phases of radiation signals between antenna devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of MIMO antenna apparatus is decreased to reduce communication terminal size, then the terminal size is reduced, but electromagnetic coupling between antenna devices occurs and performance deteriorates
Solution Approach 1:
The patent introduces ground pads as intermediary elements between the antenna devices and the ground plate. These ground pads are separated by a predetermined distance to act as mediators that control the electromagnetic field distribution, thereby suppressing coupling between adjacent antenna devices while maintaining compact terminal size
Solution Approach 2:
The patent modifies the grounding structure by introducing separated ground pads with specific spacing rather than a continuous ground connection. This parameter change in the grounding configuration alters the electromagnetic characteristics, reducing coupling effects between antenna elements operating in resonant frequency bands
2Area of stationary object
If antenna devices are adjacently disposed to reduce MIMO antenna apparatus size, then the apparatus size is decreased, but electromagnetic coupling between antenna devices increases
Solution Approach 1:
The separated ground pads serve as intermediary structures between adjacently disposed antenna devices. By positioning these ground pads at specific intervals, the patent creates electromagnetic isolation zones that reduce harmful coupling effects while allowing compact adjacent placement of antenna elements
Solution Approach 2:
The grounding system is segmented into multiple separate ground pads rather than using a continuous ground structure. This segmentation creates discrete grounding zones that electrically isolate adjacent antenna devices, suppressing electromagnetic coupling while maintaining compact overall apparatus area
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 design effectively reduces electromagnetic coupling, enhancing the operation characteristics and maintaining performance even when antenna devices are adjacently disposed, allowing for a smaller communication terminal size.
Implementation Method 1
antenna devices each having an operation line extending parallel by a predetermined extension length from one end portion and configured to operate in a resonant frequency band when power is supplied
Implementation Method 2
electromagnetic coupling occurs between antenna devices. This is because when decreasing a size of a MIMO antenna apparatus in order to decrease a size of a communication terminal, a performance of a wireless communication system is deteriorated
Data Source
AI summary
A MIMO antenna apparatus is provided. The MIMO antenna apparatus includes a plurality of antenna devices each having an operation line extending parallel by a predetermined extension length from one end portion and configured to operate in a resonant frequency band when power is supplied. The apparatus also includes a main board divided into a device area and aground area. The apparatus further includes a plurality of ground pads each extending from the ground plate to the device area in the main board and configured to connect the one end portion of each of the antenna devices to the ground plate. The apparatus also includes a plurality of feeding pads mounted adjacent to the ground pad in the device area and configured to connect each of the antenna devices to the main board and to provide power to each of the antenna devices.