Meandering Dipole Antenna for Compact Wireless Devices
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Solution Overview
Problem
Existing built-in antennas in wireless communication products, such as dipole antennas, face challenges in achieving wider operating bandwidth and higher radiation efficiency due to sensitivity to environmental conditions like nearby metal parts, leading to reduced communication range and performance.
Innovation Solution
A dipole array antenna design featuring meandering traces in its radiators, where at least one-sixteenth wavelength of each arm is a direct trace and the rest is a meandering trace, effectively reducing antenna size while maintaining performance by optimizing energy radiation and impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional dipole antenna is used in wireless communication products, then the antenna can provide basic radiation function, but the antenna size is large and the radiation efficiency is reduced due to sensitivity to environmental conditions and neighboring metal parts
Solution Approach 1:
The patent applies meandering trace design to the radiator structure, where straight lines are replaced with curved meandering paths. This curvature allows the antenna to achieve resonant length equivalent to a longer straight antenna while occupying less physical space, thereby reducing antenna size without compromising radiation efficiency
Solution Approach 2:
The meandering trace extends the current path in the planar dimension rather than requiring additional space in other dimensions. By folding the current path back and forth in a meandering pattern, the antenna achieves the required electrical length within a compact footprint, resolving the contradiction between size and radiation efficiency
2Volume of moving object
If the antenna size is reduced to meet compact product requirements, then the antenna can fit in smaller devices, but the operating bandwidth becomes narrower and radiation efficiency decreases
Solution Approach 1:
The meandering trace with optimized curvature radius allows the antenna to maintain resonant characteristics across a broader frequency range. The curved path provides gradual impedance transformation and reduces current discontinuities, thereby widening the operating bandwidth while keeping the antenna compact
Solution Approach 2:
The patent optimizes parameters such as meandering trace width, trace spacing, and curvature radius to achieve broadband performance. By carefully controlling these geometric parameters, the antenna maintains good impedance matching and radiation efficiency across a wide frequency range despite the reduced physical size
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
This design enhances radiation efficiency and reduces antenna size without compromising performance, leading to improved communication range and bandwidth, making it suitable for compact wireless communication devices.
Implementation Method 1
The first radiator is electrically connected to the first transmission line, and includes a first arm electrically connected to the first transmission line, and extending toward a first direction
Data Source
AI summary
A dipole array antenna includes a plurality of antenna units including a first radiator and a second radiator. The first radiator includes first and second arms extending toward a first direction, the second radiator includes third and fourth arms extending toward an opposite of the first direction. A first current route of the first radiator includes a first direct trace extending from the first transmission line toward at least a quarter of the first arm and the second arm, and a first meandering trace extending from the first direct trace to at most three quarters of the first arm and the second arm. A second current route of the second radiator includes a second direct trace and a second meandering trace with similar layout as the first current route of the first radiator.