Mobile Antenna Structure for Wideband Coverage With Low Interference
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Solution Overview
Problem
Existing mobile device antennas often have insufficient bandwidth, which negatively affects communication quality, particularly in devices requiring wideband operations across multiple frequency bands.
Innovation Solution
A novel antenna structure comprising a ground element, feeding radiation elements, shorting radiation elements, filter and tuning circuits, and a proximity sensor, designed to cover a wide range of frequency bands including 617 MHz to 5925 MHz, with elements optimized for impedance matching and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional antenna designs are used, then the device structure remains simple, but the bandwidth is insufficient and communication quality deteriorates
Solution Approach 1:
The antenna structure is divided into multiple radiation elements (first, second, third, and fourth radiation elements) with different orientations and functions. Each element is responsible for specific frequency bands or polarization directions, allowing the overall antenna to achieve wideband operation through segmented functionality rather than a single complex resonator.
Solution Approach 2:
The antenna elements are arranged in a nested configuration where the first and second radiation elements are positioned within or adjacent to each other, and the third and fourth elements are similarly arranged. This nesting allows multiple functional elements to occupy minimal space while maintaining their individual radiation characteristics.
2Adaptability or versatility
If antenna elements are added to increase bandwidth, then communication quality improves, but interference between elements increases
Solution Approach 1:
The radiation elements are designed with asymmetric orientations - the first and second elements have different angular orientations relative to the ground element, and similarly for the third and fourth elements. This asymmetric arrangement breaks the symmetry that would cause constructive interference, allowing elements to operate at different frequency bands with minimal mutual coupling.
Solution Approach 2:
The antenna structure utilizes three-dimensional spatial arrangement with elements oriented in different directions and planes. The first and second radiation elements extend in one dimension while the third and fourth elements extend in another dimension, creating spatial separation that reduces electromagnetic interference while maintaining compact overall dimensions.
3Adaptability or versatility
If multiple radiation elements are used to cover wide frequency bands, then bandwidth increases, but the antenna size increases
Solution Approach 1:
The antenna elements are arranged in a nested configuration where the first and second radiation elements are positioned within or adjacent to each other, and the third and fourth elements are similarly arranged. This nesting allows multiple functional elements to occupy minimal space while maintaining their individual radiation characteristics.
Solution Approach 2:
The antenna structure utilizes three-dimensional spatial arrangement with elements oriented in different directions and planes. The first and second radiation elements extend in one dimension while the third and fourth elements extend in another dimension, creating spatial separation that reduces electromagnetic interference while maintaining compact overall dimensions.
4Reliability
If impedance matching is optimized for specific bands, then communication quality improves in those bands, but performance deteriorates in other bands
Solution Approach 1:
The antenna structure is divided into multiple radiation elements (first, second, third, and fourth radiation elements) with different orientations and functions. Each element is responsible for specific frequency bands or polarization directions, allowing the overall antenna to achieve wideband operation through segmented functionality rather than a single complex resonator.
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 achieves wideband operations, maintaining good communication quality and reducing interference, suitable for next-generation 5G communication while minimizing size and manufacturing costs.
Implementation Method 1
a feeding radiation element 120, a first radiation element 130, a second radiation element 140, a third radiation element 160... The first radiation element 130 and the second radiation element 140 are coupled to the feeding radiation element
Implementation Method 2
a ground element 110... The ground element 110 provides a ground voltage
Data Source
AI summary
An antenna structure includes a ground element, a feeding radiation element, a first radiation element, a second radiation element, a shorting radiation element, a third radiation element, a filter circuit, a proximity sensor, and a tuning circuit. The ground element provides a ground voltage. The feeding radiation element has a feeding point. The first radiation element and the second radiation element are coupled to the feeding radiation element, or are disposed adjacent to the feeding radiation element. The first radiation element is also coupled through the shorting radiation element to the ground voltage. The third radiation element is disposed adjacent to the first radiation element. The third radiation element is coupled through the filter circuit to the proximity sensor. The filter circuit is also coupled through the tuning circuit to the ground voltage.