Mobile Antenna Layout Around Speaker and Cable Interference
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Solution Overview
Problem
Metal elements and circuit components in mobile devices often degrade the radiation efficiency of antennas, affecting the overall communication quality of wireless communication devices.
Innovation Solution
A mobile device antenna structure comprising a ground element, multiple radiation elements, a dielectric substrate, a speaker body, and a cable, where the radiation elements are strategically positioned to minimize interference from the speaker body and cable, ensuring high radiation efficiency and wideband operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If metal elements and circuit components are included in the mobile device, then the device functionality is improved, but the radiation efficiency of the antenna deteriorates
Solution Approach 1:
The antenna is divided into multiple radiation elements (first, second, third, and fourth radiation elements) with different orientations and configurations. This segmentation allows each element to be optimally positioned relative to interfering components like the speaker body and cable, thereby maintaining radiation efficiency while preserving device functionality.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by extending radiation elements in different directions (e.g., first radiation element in first direction, second radiation element in second direction) and positioning them at different heights relative to the speaker body and cable. This dimensional approach allows the antenna to maintain radiation efficiency despite the presence of interfering components in the device.
2Loss of energy
If the antenna structure is designed to avoid interference from speaker body and cable, then radiation efficiency is improved, but device complexity increases
Solution Approach 1:
The antenna structure is integrated with the speaker body and cable assembly by positioning radiation elements relative to these components. The first and fourth radiation elements are arranged to overlap with the speaker body projection, while the cable is routed to avoid overlapping with any radiation elements. This merging approach achieves high radiation efficiency without significantly increasing overall device complexity.
Solution Approach 2:
Different radiation elements are designed with specific local characteristics - the first and fourth radiation elements are positioned to utilize the speaker body area, while the second and third radiation elements are configured to avoid cable interference. This local optimization allows each element to perform its function efficiently without requiring complex overall restructuring.
3Adaptability or versatility
If multiple radiation elements are used to achieve wideband operation, then frequency coverage is improved, but manufacturing complexity increases
Solution Approach 1:
The wideband antenna is segmented into multiple radiation elements (first, second, third, and fourth) that can be independently designed and manufactured. Each element targets specific frequency ranges, and their combined performance achieves wideband operation. This segmentation simplifies the manufacturing process compared to designing a single complex wideband element.
Solution Approach 2:
The multiple radiation elements serve multiple functions - they collectively provide wideband frequency coverage while individually maintaining simple geometries that are easy to manufacture. The first and fourth elements work together with the speaker body, while the second and third elements provide additional frequency coverage, creating a universal antenna system that handles multiple frequency bands.
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 proposed antenna structure maintains high radiation efficiency and communication quality even with the presence of a speaker body and cable, supporting multiple frequency bands and reducing the overall size of the device.
Implementation Method 1
a first radiation element (120), a second radiation element (130), a third radiation element (140), and a fourth radiation element (150... An antenna structure is formed by the first radiation element (120), the second radiation element (130), the third radiation element (140), and the fourth radiation element (150)
Data Source
AI summary
A mobile device with high radiation efficiency includes a ground element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a dielectric substrate, a speaker body, and a cable. The first radiation element and the fourth radiation element are coupled to the ground element. The second radiation element and the third radiation element are coupled to a feeding point. An antenna structure is formed by the first radiation element, the second radiation element, the third radiation element, and the fourth radiation element. The speaker body has a first vertical projection on the dielectric substrate, and the first vertical projection at least partially overlaps the third radiation element. The cable is coupled to the speaker body. The cable has a second vertical projection on the dielectric substrate, and the second vertical projection does not overlap the antenna structure at all.