Antenna Device with Split Ground Planes for Omnidirectional Coverage
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Solution Overview
Problem
Conventional antenna devices face challenges in achieving efficient radiation performance and cost-effectiveness, particularly when multiple antennas are required to maintain communication efficiency, leading to increased costs and potential performance degradation due to obstacles.
Innovation Solution
The proposed antenna device incorporates a first antenna with a specific resonance frequency and a second antenna with a multiple of that frequency, arranged adjacent to the first antenna, to enhance radiation performance and achieve 360° coverage without the need for additional antennas, thereby preventing performance degradation even when they are closer than half a wavelength apart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas having the same shape are arranged to selectively transmit/receive signals, then communication efficiency improves, but cost increases due to increased number of antennas and related design requirements
Solution Approach 1:
The patent makes a single antenna structure capable of functioning as multiple antennas by creating split ground planes that enable the same physical structure to operate at multiple resonance frequencies (fundamental frequency and its multiples), thereby achieving multi-functionality without increasing the number of physical antenna components
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by introducing split ground planes with specific dimensions and configurations, which create multiple resonance frequencies from a single antenna structure, allowing it to operate at both the fundamental frequency and its multiples without adding more antenna elements
2Reliability
If multiple antennas are arranged to achieve 360° coverage, then radiation performance improves, but cost increases due to additional antennas and design requirements
Solution Approach 1:
The patent enables a single antenna to provide omnidirectional radiation coverage by creating multiple resonance modes through split ground planes, allowing the same physical structure to achieve 360° coverage at both fundamental and harmonic frequencies without requiring multiple separately positioned antennas
Solution Approach 2:
The patent segments the ground plane into multiple regions (first ground plane and second ground plane) with specific dimensional relationships, where each segment contributes to creating different resonance frequencies while maintaining a unified antenna structure that provides comprehensive radiation coverage
3Area of stationary object
If antennas are arranged closer than 1/2 wavelength apart, then space is saved, but performance degradation occurs due to mutual interference
Solution Approach 1:
The patent introduces a ground plane structure as an intermediary element between antenna elements, where the split ground planes with specific impedance characteristics act as isolation structures that reduce mutual coupling and interference between resonant modes, allowing antennas to be placed closer than 1/2 wavelength without performance degradation
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by optimizing the dimensions and positions of split ground planes, which control the impedance and coupling between different resonant modes, enabling close spacing while maintaining performance through parameter optimization rather than increasing physical separation
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 configuration improves radiation efficiency and maintains performance across all directions, achieving higher RSSI values and lower PER values compared to single-antenna devices, while reducing costs by eliminating the need for extra antennas.
Implementation Method 1
a first antenna having a first frequency as a resonance frequency thereof, the first antenna being configured to transmit/receive the first frequency band signal; and a second antenna having a multiple of the first frequency as a resonance frequency thereof
Data Source
AI summary
An antenna device according to various embodiments comprises: a first antenna for transmitting and receiving a first frequency band signal, the first antenna having a first frequency as a resonance frequency; and a second antenna, disposed adjacent to the first antenna, for transmitting and receiving the first frequency band signal, the second antenna having a multiplication frequency of the first frequency as a resonance frequency. Other embodiments are possible.