Slide-Type Wireless Antenna Using Sliding Contact Segmentation
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Solution Overview
Problem
Conventional slide-type wireless terminal devices face challenges in minimizing antenna size due to the need for extended antenna lengths, which increases the device's overall size and requires significant mounting space, compromising portability and safety from electromagnetic waves.
Innovation Solution
The antenna is designed with a radiator in the first body and a ground surface on the second body, connected by power feeders and short-circuit wires that come into contact when the bodies slide, allowing for a compact configuration without additional cables, utilizing the marginal space effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna length is extended to achieve half wavelength for optimal dipole antenna characteristics, then the communication performance is improved, but the device size and mounting space requirements increase
Solution Approach 1:
The antenna is divided into two separate segments: a radiator element in the first body and a ground surface in the second body. These segments are connected through sliding contact elements (power feeder and short-circuit wire) that engage when the bodies are slid apart, allowing the antenna to achieve its full functional length only when needed while maintaining a compact form when closed.
Solution Approach 2:
The antenna structure transitions from a static compact form to a dynamic extended configuration through the sliding mechanism. When the first and second bodies are slid relative to each other, the power feeder and short-circuit wire extend to connect the radiator and ground surface, dynamically achieving the required antenna length for optimal performance.
2Reliability
If the antenna is formed on both the cover and body of the mobile terminal to extend its length, then the communication capability is enabled, but the space required in the mobile terminal increases significantly
Solution Approach 1:
The antenna components are nested within the compact structure of the slide-type device. The radiator is integrated into the first body while the ground surface is integrated into the second body, with the connecting elements (power feeder and short-circuit wire) nested within the sliding mechanism. When closed, the antenna components occupy minimal space within the overlapping bodies.
Solution Approach 2:
The antenna length is achieved not by increasing the footprint area within each body, but by utilizing the vertical dimension created by the sliding mechanism. The power feeder and short-circuit wire extend in the direction of sliding movement, converting a two-dimensional area constraint into a three-dimensional space solution.
Data Source
AI summary
An antenna for a slide-type wireless terminal device includes a radiator formed in a first body, a ground surface formed on a second body, a power feeder connected to the ground surface in the second body, a first connection part connected to the radiator in the first body and operative to come in contact with the power feeder when the first body is slidably moved, and a short-circuit wire operative to come in contact with the radiator and the ground surface when the first body is slidably moved.