Lighting-up Device Metallic Casing Slot Antenna Integration
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Solution Overview
Problem
Conventional lighting apparatuses with metallic casings that house power supply circuits interfere with wireless communication signals due to their shielding properties, compromising the communication performance of integrated antennas.
Innovation Solution
Incorporating a metallic casing with slits that function as slot antennas, electromagnetically coupled to the wireless communication circuit's antenna, allowing for improved communication performance by enhancing signal reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an antenna is disposed inside the metallic casing for integration, then device complexity is reduced, but communication performance deteriorates due to signal shielding
Solution Approach 1:
The metallic casing serves multiple functions: it provides safety shielding for the power supply circuit while simultaneously functioning as part of the antenna system through the slits. The slits enable the casing to act as a slot antenna, allowing the same structure to fulfill both protective and communication functions
Solution Approach 2:
The antenna system is merged with the metallic casing structure itself. Instead of treating the antenna as a separate component, the slits on the casing surface are electromagnetically coupled to the antenna, combining the casing and antenna into an integrated system that achieves both safety and communication performance
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
The solution achieves omnidirectional wireless communication performance and increased reliability by utilizing the metallic casing's slits to function as slot antennas, overcoming the shielding issues and ensuring effective communication regardless of the casing's installation orientation.
Implementation Method 1
each of the first slit and the second slit is electromagnetically coupled to the antenna and functions as a slot antenna
Implementation Method 2
A metallic casing shields against radio waves, and thus poses a problem of ensuring a communication function of an antenna
Data Source
AI summary
A lighting-up device includes: a power supply circuit which supplies power to a light source; a wireless communication circuit including an antenna; and a metallic casing which includes metal, and houses the power supply circuit and the wireless communication circuit. The metallic casing has a first side face and a second side face which share a side, the first side face is provided with a first slit which extends in a first direction intersecting with the side, from a first portion of the side other than both ends of the side, the second side face is provided with a second slit which extends in a second direction intersecting with the side, from a second portion of the side other than the both ends of the side, and each of the first slit and the second slit is electromagnetically coupled to the antenna and functions as a slot antenna.