Antenna Emitter With Slit And Opening For Mobile Terminals
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Solution Overview
Problem
The communication performance of antenna devices in mobile communication terminals, such as cellular phones, is affected by metallic components, limiting the size and shape of the antenna and casing, which restricts signal transmission and reception efficiency.
Innovation Solution
An antenna device with a feeding member featuring a coil pattern and an emitting member that includes an opening portion and a slit portion, allowing partial overlap with the coil pattern, enhances signal transmission and reception by optimizing the distribution of the magnetic field and inducing currents, thereby improving gain and communication distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of the antenna is increased to ensure predetermined communication performance, then communication performance is improved, but the device size increases which is not acceptable in small mobile communication terminals
Solution Approach 1:
The patent changes the structural parameters of the emitting member by introducing opening portions and slit portions. These geometric modifications alter the electromagnetic field distribution and resonance characteristics, enabling improved communication performance without increasing the physical size of the antenna in mobile communication terminals
Solution Approach 2:
The emitting member is designed with non-uniform local structures including opening portions and slit portions at specific locations. These local modifications create concentrated electromagnetic field regions that enhance signal transmission and reception efficiency without requiring overall antenna size increase
2Adaptability or versatility
If metallic components are arranged densely in the casing to achieve multifunctionality, then device functionality is improved, but the communication performance of the antenna is degraded
Solution Approach 1:
The emitting member incorporates local opening portions and slit portions that create specific electromagnetic field distribution patterns. These local structural qualities enable the antenna to maintain communication performance despite the presence of densely arranged metallic components in the casing
Solution Approach 2:
The patent designs the emitting member structure to utilize and adapt to the electromagnetic environment created by surrounding metallic components. The opening and slit portions are positioned to optimize field distribution in the presence of metallic structures, converting the potentially harmful interference into a workable electromagnetic environment
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 improves signal gain and communication performance, allowing for longer communication distances and more efficient signal transmission and reception, even in the presence of metallic components within the casing.
Implementation Method 1
a non-contact IC card is embedded... using an electromagnetic field between a reader-writer for generating an induction field and a wireless IC device
Implementation Method 2
an excited magnetic field passes through the opening portion of the emitting member and is ideally distributed, and the induction field excites an inductive current in the vicinity of the opening portion of the emitting member
Data Source
AI summary
An antenna device includes a feeding member including a coil pattern and an emitting member to emit a transmit signal supplied from the feeding member and to receive a receive signal and supplying it to the feeding member. The emitting member includes an opening portion and a slit portion communicating with the opening portion. When seen in plan view from the direction of the winding axis of the coil pattern, the opening portion of the emitting member and the inner region of the coil pattern overlap each other, and the emitting member and the coil pattern overlap each other at least partially.