Closed-Loop Antenna Structure for Wideband Mobile Coverage
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Solution Overview
Problem
Existing antennas in mobile devices often have insufficient bandwidth, leading to reduced communication quality, which is a critical issue for wireless communication systems.
Innovation Solution
A novel antenna structure comprising a feeding adjustment element, asymmetrical and meandering radiation elements, and additional slots and slots, all disposed on a dielectric substrate, forming a closed loop structure to enhance bandwidth and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antenna structures are used, then the device structure is simple, but the bandwidth coverage is insufficient
Solution Approach 1:
The antenna structure is divided into multiple functional segments: a first radiation element for low-frequency band, a second radiation element for high-frequency band, and a connection element linking them. This segmentation allows each element to be optimized for specific frequency ranges, achieving wide bandwidth coverage from 617 MHz to 5925 MHz while maintaining manageable structural complexity
Solution Approach 2:
The antenna structure employs a nested configuration where the first and second radiation elements are arranged in a nested or adjacent manner on the dielectric substrate. The connection element integrates both elements into a unified structure, allowing compact placement that covers multiple frequency bands without requiring separate antenna components for each band
2Volume of moving object
If compact antenna design is implemented, then the device size is reduced, but the bandwidth performance deteriorates
Solution Approach 1:
The antenna structure transitions from traditional linear or planar designs to a three-dimensional nested configuration on the dielectric substrate. The first and second radiation elements are positioned in different spatial arrangements (nested or adjacent), utilizing vertical and lateral dimensions to achieve wide bandwidth coverage within a compact footprint, covering 617 MHz to 5925 MHz without increasing overall device volume
Solution Approach 2:
The nested arrangement of radiation elements allows one element to be positioned within or alongside another, maximizing space utilization. This nested doll approach enables multiple resonant frequencies to be achieved within a single compact antenna structure, maintaining small device size while achieving wide bandwidth coverage across low and high frequency bands
Data Source
AI summary
An antenna structure includes a feeding adjustment element, an asymmetrical radiation element, a first meandering radiation element, a second meandering radiation element, a connection radiation element, a first additional radiation element, a second additional radiation element, and a dielectric substrate. A closed loop structure is formed by the first meandering radiation element, the second meandering radiation element, and the connection radiation element. The first additional radiation element is coupled to the connection radiation element and the first meandering radiation element. A first open slot and a first closed slot are formed between the first meandering radiation element and the first additional radiation element. The second additional radiation element is coupled to the connection radiation element and the second meandering radiation element. A second open slot and a second closed slot are formed between the second meandering radiation element and the second additional radiation element.