Antenna Structure Resonant Modes for Wireless Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing requirement for wireless communication devices to support multiple frequency bands, combined with their maximized screen and light-thin size, leads to a shielding effect from metallic components, resulting in decreased antenna transmission efficiency.
Innovation Solution
An antenna structure comprising a radiating portion and a coupling portion, connected through a matching and switching circuit, which excites resonant modes across various frequency bands, including LTE-A middle, low, and high frequency bands, using a flexible printed circuit material to minimize shielding and enhance radiating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless communication device uses metallic components around the antenna, then the device structure is strengthened and EMI shielding is improved, but the antenna transmission efficiency decreases due to shielding effect
Solution Approach 1:
The patent extracts the metallic components from the immediate vicinity of the antenna by positioning them at the edge of the substrate, away from the antenna structure. This separation removes the harmful shielding effect while preserving the structural strength and EMI shielding functionality of the metallic components elsewhere in the device.
2Volume of moving object
If the wireless communication device maximizes screen size and minimizes thickness, then the device becomes more compact and modern, but metallic components cause shielding effect on the antenna
Solution Approach 1:
The patent applies local quality by creating a specific zone around the antenna that is free from metallic components. The metallic components are strategically positioned only at the edge of the substrate, ensuring that the antenna region maintains optimal electromagnetic properties while the device achieves thin profile and large screen size elsewhere.
3Adaptability or versatility
If the antenna needs to cover multiple frequency bands (2G/3G/4G), then the communication versatility is improved, but the antenna bandwidth requirements increase making it more difficult to maintain efficiency
Solution Approach 1:
The patent designs the antenna structure with a meandering configuration that can operate across multiple frequency bands (2G, 3G, 4G) simultaneously. The antenna elements are configured to support wide bandwidth operation, allowing a single antenna structure to perform multiple communication functions across different frequency ranges while maintaining transmission efficiency through proper positioning away from metallic components.
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 antenna structure effectively covers a wide range of frequency bands from 700 MHz to 2690 MHz, achieving radiating efficiencies of 32% to 63%, thereby improving transmission efficiency and meeting current communication system requirements.
Implementation Method 1
An antenna structure comprises a radiating portion and a coupling portion, connected through a matching and switching circuit, which excites resonant modes across various frequency bands
Data Source
AI summary
An antenna structure includes a radiating portion and a coupling portion. The radiating portion is electrically connected to a feed point for feeding current. The coupling portion is electrically connected to a ground point to be grounded. The coupling portion is spaced apart from the radiating portion. The radiating portion excites a first resonant mode for generating radiation signals in a first frequency band. The current flowing through the radiating portion is coupled to the coupling portion, and the coupling portion excites a second resonant mode and a third resonant mode for generating radiation signals in a second frequency band and a third frequency band. Frequencies of the first frequency band are higher than frequencies of the second frequency band. Frequencies of the third frequency band are higher than frequencies of the first frequency band.