Antenna Structure With Slot and Grounded Element for Wideband
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Solution Overview
Problem
Designing a wideband antenna element that is small in size while maintaining effective communication quality across various frequency bands is a challenge, as existing antennas often have insufficient bandwidth, affecting mobile device performance.
Innovation Solution
The proposed antenna structure incorporates a metal mechanism element with a slot, coupled with first, second, and third radiation elements on a dielectric substrate, which extends across the slot and is connected to a ground voltage, optimizing frequency coverage from 600 MHz to 2170 MHz through precise element sizing and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced, then the compactness is improved, but the bandwidth is reduced
Solution Approach 1:
The antenna is divided into multiple radiation elements (first, second, and third radiation elements) with different lengths and configurations. Each element contributes to different frequency bands, allowing the compact antenna to achieve wideband operation by segmenting the radiation function across multiple elements rather than relying on a single large element.
Solution Approach 2:
The antenna structure utilizes three-dimensional space efficiently by positioning radiation elements at different locations and orientations within the compact housing. The first radiation element extends in one direction, the second radiation element extends in another direction, and the third radiation element is positioned to provide additional radiation coverage, effectively using spatial dimensionality to achieve wide bandwidth in a small volume.
2Adaptability or versatility
If multiple frequency bands are supported, then the adaptability is improved, but the device complexity is increased
Solution Approach 1:
The antenna structure is designed with multi-functionality where the same antenna housing and radiation elements serve multiple frequency bands simultaneously. The first radiation element supports both the first frequency band (600-960 MHz) and second frequency band (1710-2170 MHz), while the third radiation element provides additional coverage, allowing a single antenna structure to perform multiple communication functions without requiring separate antennas for each band.
Data Source
AI summary
An antenna structure includes a metal mechanism element, a first radiation element, a second radiation element, a third radiation element, and a dielectric substrate. The metal mechanism element has a slot with a first closed end and a second closed end. The first radiation element has a feeding point. The second radiation element is coupled to the feeding point. The second radiation element and the first radiation element substantially extend away from each other. The third radiation element is coupled to a ground voltage. The third radiation element extends across the slot of the metal mechanism element. The dielectric substrate has a first surface and a second surface opposite to each other. The first radiation element, the second radiation element, and the third radiation element are disposed on the first surface of the dielectric substrate. The second surface of the dielectric substrate is adjacent to the slot.