Switching Element Antenna for Multi-Band Operation
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Solution Overview
Problem
There is a challenge in designing an antenna device for electronic devices that can efficiently handle various frequency bands while maintaining a compact size and preventing interference with other circuit components, particularly in thin form factors required for portability.
Innovation Solution
The antenna device incorporates a power feeding unit, a ground unit, and a radiating unit connected to the power feeding unit, along with a switching element that selects specific points on the ground unit to adjust the resonance frequency, allowing it to operate effectively across multiple frequency bands without compromising size or interfering with other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radiators are provided to cope with various frequency bands, then the antenna device can handle various frequency bands, but the device thickness increases and portability is compromised
Solution Approach 1:
The patent employs a switching element that dynamically connects the radiating unit to different ground points based on the desired frequency band. This dynamic reconfiguration allows a single radiating unit to operate across multiple frequency bands by changing its electrical length, eliminating the need for multiple fixed radiators and thereby reducing device thickness while maintaining frequency band versatility
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by connecting the radiating unit to different ground points with varying distances. This parameter change (electrical length) allows the same radiating unit to resonate at different frequencies, enabling multi-band operation without increasing device thickness
2Reliability
If radiators are installed at sufficient distance from other circuit devices to prevent interference, then interference is prevented, but the device thickness increases
Solution Approach 1:
The switching element enables dynamic control of the antenna's electrical characteristics, allowing the system to adapt its radiation pattern and impedance matching for different frequency bands. This dynamic adjustment optimizes performance at various frequencies without requiring increased physical separation from other circuit devices, thereby maintaining reliability while reducing device thickness
3Length of stationary object
If a single radiating unit is used with switching element, then device thickness is reduced, but the ability to handle various frequency bands is compromised
Solution Approach 1:
The radiating unit is designed as a multi-functional element that can operate across multiple frequency bands by connecting to different ground points. The switching element enables this universality by selecting appropriate ground connections based on the operating frequency, allowing a single radiating unit to perform the function of multiple radiators would otherwise be needed
Solution Approach 2:
The patent introduces an electrical dimension (switching between different ground points) to achieve frequency band diversity without increasing the physical dimensions of the device. By changing the electrical length through switching, the system achieves multi-band capability in a compact form factor
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 antenna device to securely handle various frequency bands, maintain radiation efficiency, and adapt to changes in resonance frequencies, even when influenced by user interaction, thereby ensuring stable wireless communication in compact electronic devices.
Implementation Method 1
a radiating unit (105) that is electrically connected to the power feeding unit (101)
Implementation Method 2
a switching element (107) that selects one or more points from a plurality of different points on the ground unit (103) and connects the radiating unit (105) to the selected one or more points
Data Source
AI summary
Disclosed are an antenna device and an electronic device that includes the antenna device. The antenna device includes a power feeding unit, a ground unit, a radiating unit that is electrically connected to the power feeding unit, and a switching element that selects one or more points from a plurality of different points of the ground unit and connects the radiating unit to the selected one or more points.