L-Shaped Antenna Array for High Gain
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Solution Overview
Problem
Conventional omnidirectional dipole antennas suffer from low gain values and limited transmission distances, and microstrip antennas are costly and bulky due to their requirement for supporting structures.
Innovation Solution
An antenna array comprising L-shaped antenna units with end-fire dipole configurations, where each unit has a specific geometric arrangement to facilitate omnidirectional signal transmission with reduced dimensions, utilizing L-shaped substrates and radiation elements to enhance signal coupling and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the dimension of the dipole antenna is increased to improve gain value, then the gain value increases, but the size and complexity of the antenna increases
Solution Approach 1:
The patent divides the antenna system into four separate antenna units arranged in a specific geometric configuration. Each unit contributes to the overall radiation pattern, achieving high gain through spatial arrangement rather than increasing individual element size. This segmentation allows the system to achieve 11 dBi gain with compact individual elements.
Solution Approach 2:
The patent transitions from a single linear dipole to a three-dimensional arrangement of four antenna units with L-shaped cross-sections. The units are positioned at specific coordinates (0,0,0), (d,0,0), (0,d,0), and (d,d,0) to create omnidirectional radiation in the horizontal plane while maintaining compact vertical profile, thus achieving high gain without proportional increase in overall dimension.
2Adaptability or versatility
If conventional microstrip antennas are used for omnidirectional transmission, then signal transmission from different directions is achieved, but the cost and size increase due to supporting structures
Solution Approach 1:
The patent removes the conventional supporting shelf or holder that is typically required for microstrip antennas. The four antenna units are designed to be self-supporting through their L-shaped geometry and mutual positioning, eliminating the need for additional mechanical support structures and reducing overall device complexity.
Solution Approach 2:
The patent integrates the radiating elements and supporting structures into a unified L-shaped configuration. The antenna units are directly coupled to the L-shaped substrate without separate support shelves, merging the functional and structural elements into a single integrated assembly that reduces complexity and cost.
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 antenna array achieves improved omnidirectional signal transmission with reduced antenna size, maintaining or exceeding the gain values of larger dipole antennas while minimizing cost and size, as demonstrated by E-plane and H-plane divergence field analysis and input return loss measurements.
Implementation Method 1
The first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit have L-shaped cross-sections... facilitates omnidirectional signal transmission... radiation elements to enhance signal coupling and transmission efficiency
Data Source
AI summary
An antenna array is provided. The antenna comprises a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit. The first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit have L-shaped cross-sections. The second antenna unit is close to the first antenna unit. The third antenna unit is close to the second antenna unit. The fourth antenna unit is close to the third antenna unit and the first antenna unit. The fourth antenna unit is opposite to the second antenna unit. The third antenna unit is opposite to the first antenna unit.