Multi-band PCB Antenna Segmentation for VSWR Control
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Solution Overview
Problem
Existing antennas for wireless communications, particularly in the 2.4 GHz and 5.0 GHz bands, face challenges in achieving high efficiency and ease of manufacturing while providing high bandwidth and efficient signal transmission/reception.
Innovation Solution
The development of enhanced on-board PCB antennas with specific geometric configurations, such as meander lines and L-shaped monopole structures, which allow for miniaturization, tunability, and integration across multiple frequency bands, including 3G, 4G, and LTE, without requiring a fixed size ground plane or common grounding, facilitating easy manufacturing and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional antenna designs are used for 2.4 GHz and 5.0 GHz bands, then signal transmission efficiency can be maintained, but the antenna size and complexity increase, making manufacturing difficult
Solution Approach 1:
The antenna is divided into multiple radiating elements (first, second, third, and fourth radiating elements) that can be independently designed and optimized for different frequency bands, allowing modular manufacturing and assembly while maintaining overall system efficiency
Solution Approach 2:
The antenna design supports multiple frequency bands (2.4 GHz, 5.0 GHz, and other bands) through a single multi-element structure, eliminating the need for separate antennas for each band and simplifying manufacturing processes
2Adaptability or versatility
If high bandwidth is achieved through traditional antenna designs, then signal coverage improves, but manufacturing cost and complexity increase
Solution Approach 1:
The antenna elements are designed to operate across multiple frequency bands simultaneously, providing wide bandwidth coverage (2.4 GHz, 5.0 GHz, and other bands) through a single unified structure that simplifies manufacturing compared to multiple specialized antennas
Solution Approach 2:
The antenna utilizes three-dimensional spatial arrangement of radiating elements with specific geometric configurations, enabling broad bandwidth performance through spatial diversity rather than increasing structural complexity in the manufacturing domain
3Reliability
If antenna efficiency is improved through complex structures, then power radiation efficiency increases, but manufacturing ease decreases
Solution Approach 1:
The antenna is segmented into multiple independent radiating elements, each optimized for specific frequency bands, allowing efficient power radiation through distributed elements while maintaining manufacturing simplicity through modular construction
Solution Approach 2:
Each radiating element is designed with specific local geometric characteristics optimized for its intended frequency band, enabling high power radiation efficiency at each element while the overall structure remains simple and manufacturable
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
These antennas exhibit superior performance with voltage standing wave ratios (VSWR) below 3:1 across various frequency bands, ensuring efficient power radiation and absorption, and are cost-effective to produce due to their single-layer PCB design, suitable for diverse devices like routers and smartphones.
Implementation Method 1
antennas that efficiently radiate, i.e. transmit and/or receive desired signals
Implementation Method 2
meander lines and L-shaped monopole structures, which allow for miniaturization
Implementation Method 3
voltage standing wave ratios (VSWR) below 3:1 across various frequency bands, ensuring efficient power radiation and absorption
Data Source
AI summary
Embodiments of the invention provide several antenna designs that exhibit both high bandwidth and efficiency, such as for operation in one or more bands, such as but not limited to operation in 3G, 4G, LTE bands. A first aspect of the invention concerns the form factor of the enhanced antenna; a second aspect of the invention concerns the ease with which the enhanced antenna is manufactured; and a third aspect concerns the superior performance exhibited by the enhanced antenna across one or more bandwidths.