Bendable Antenna for Wireless Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Terrestrial DMB antennas are inherently long due to their design for average reception sensitivity, making them inconvenient for portable devices, and existing solutions struggle to shorten them without compromising reception sensitivity.
Innovation Solution
A broadcast receiving antenna system for wireless terminals that is adjustable, functioning as either a planar inverted F antenna (PIFA) or a monopole whip antenna, with a bendable radiating part and a hinge mechanism controlled by an electromagnetic detector and antenna controller to optimize length based on signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna length is increased to improve reception sensitivity, then the reception sensitivity is improved, but the portability and mobility are deteriorated
Solution Approach 1:
The patent implements a variable length antenna system where the radiating part can be extended or retracted based on reception conditions. The antenna transitions between a first length (extended) for poor reception and a second length (retracted) for good reception, allowing the system to dynamically adapt to maintain both portability and reception sensitivity.
Solution Approach 2:
The patent changes the physical parameter of antenna length based on electromagnetic wave magnitude detection. When signal strength is weak, the antenna extends to a longer length; when signal strength is strong, it retracts to a shorter length, optimizing the balance between reception quality and device portability.
2Reliability
If the antenna length is fixed for average reception sensitivity, then the reception sensitivity is maintained, but the antenna cannot be shortened for good reception conditions
Solution Approach 1:
The patent transforms the fixed antenna into a dynamic structure with variable length. The radiating part can be positioned at different lengths depending on reception needs, allowing the antenna to be short when not needed and long when required for optimal reception.
Solution Approach 2:
The antenna system serves multiple functions: it operates as a compact antenna for portability and as an extended antenna for optimal reception. The same antenna structure adapts to different operational requirements, providing both compact storage and extended functionality.
3Ease of operation
If the antenna is made shorter to improve portability, then the portability is improved, but the reception sensitivity is deteriorated
Solution Approach 1:
The patent employs a dynamic length adjustment mechanism that extends the antenna when reception sensitivity deteriorates and retracts it when portability is prioritized. This allows the system to respond to changing conditions rather than being constrained by a fixed design compromise.
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
Enables the shortening of antenna length while maintaining reception sensitivity, allowing for optimal DMB and DVB-H services by automatically adjusting the antenna's configuration in response to signal strength, thus improving portability and service quality.
Implementation Method 1
an electromagnetic detector which detects magnitude of received electromagnetic waves
Data Source
AI summary
A broadcast receiving antenna system mounted in a wireless terminal. The antenna is bendable, and functions as a PIFA antenna or a monopole whip antenna according to whether it is bent or not. Accordingly, since the length and the type of the antenna are adjustable according to the magnitude of the DMB or DVB-H signal, optimum broadcasting services can be provided and the length of the antenna can be shortened. Ultimately, Intenna-type antenna can be mounted.