Hinge-Integrated Patch Antenna for Compact RFID Readers
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Solution Overview
Problem
In portable RFID reader devices with a hinge structure, the placement of power feeding units often interferes with the hinge, increasing the device's size, which is undesirable for compact designs.
Innovation Solution
A patch antenna configuration where the power feeding element is positioned on the side surface adjacent to the hinge structure, avoiding interference by being placed in a corner area, allowing for a compact design without increasing the device's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power feeding unit is provided on the rear surface or side surface of the antenna, then the antenna can be properly fed with power, but the power feeding unit interferes with the hinge structure and increases the size of the portable apparatus
Solution Approach 1:
The power feeding unit is positioned on the side surface of the antenna in a corner area, utilizing the three-dimensional space around the hinge structure rather than placing it on the rear surface where it would interfere with the hinge. This spatial repositioning in another dimension allows power feeding functionality to be maintained while avoiding interference with the hinge mechanism, thereby preventing increase in device size.
2Volume of moving object
If the power feeding unit is positioned to avoid the hinge structure, then device size can be reduced, but finding a suitable position becomes more complex
Solution Approach 1:
The power feeding unit is specifically positioned in the corner area of the side surface, utilizing a localized region that is naturally远离 from the hinge structure's movement path. This localized positioning strategy simplifies the overall design by identifying a specific corner region that automatically satisfies the non-interference requirement, reducing the complexity of positioning while maintaining compact device size.
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 enables the reduction of the portable RFID reader's size by preventing interference between the power feeding unit and the hinge structure, maintaining efficient power transmission while ensuring the device remains compact.
Implementation Method 1
a radiating element (2) formed in a disk shape and radiating a radio wave
Implementation Method 2
a power feeding element (5) exciting the radiating element (2)
Data Source
AI summary
According to one embodiment, an antenna mounted on a portable apparatus having a hinge structure includes: a radiating element formed in a disk shape and configured to radiate a radio wave; a power feeding element exciting the radiating element; and a ground plate including a bottom surface arranged in parallel to the radiating element and the power feeding element and a side surface configured to allow a power feeding path feeding electric power to the power feeding element to pass in an area different from an area opposed to the hinge structure.