Four-Element Phased Array Antenna for LEO Satellite Link Quality
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Solution Overview
Problem
Modern aircraft require dynamically adjustable antenna beam patterns for optimal communication with moving LEO satellites, while also needing reduced physical antenna dimensions to maintain aerodynamic efficiency, posing a challenge in balancing passive antenna gain and active signal amplification.
Innovation Solution
A four-element phased array antenna structure with optimized array axis angle, element geometry, and dimensions, supported by a base portion and a center scaffold with triangular ramp portions, allows for dynamic phased array control and beam steering, enhancing antenna performance and simplifying control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the antenna dimensions are reduced to maintain aerodynamic efficiency, then the aerodynamic performance is improved, but the passive antenna gain deteriorates
Solution Approach 1:
The antenna is divided into multiple discrete elements (four antenna elements) arranged in a phased array configuration. This segmentation allows the system to achieve higher effective gain through constructive interference and beam forming, compensating for the reduced size of individual elements while maintaining aerodynamic efficiency.
Solution Approach 2:
The patent implements dynamically adjustable beam patterns through phased array control, allowing the antenna system to adapt its radiation pattern in real-time. This dynamic capability enables the smaller antenna to maintain optimal communication link quality by electronically steering beams without mechanical movement, thus preserving both size constraints and performance.
2Reliability
If dynamically adjustable antenna beam patterns are implemented for optimal communication with moving satellites, then the communication link quality is improved, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical beam steering mechanisms with electronic phased array control. By using phase shifters and amplitude controllers for each antenna element, the system achieves dynamic beam steering and pattern adjustment without moving parts, thereby improving reliability for satellite communication while managing system complexity through electronic rather than mechanical means.
3Ease of operation
If the number of antenna elements is increased to improve beam directionality, then the beam directionality is improved, but the device complexity and physical dimensions increase
Solution Approach 1:
The patent employs an asymmetric tetrahedral geometry for the four-element phased array, with elements positioned at specific coordinates to optimize beam directionality toward LEO satellites. This asymmetric arrangement allows effective beam steering and shaping with only four elements, avoiding the need for larger symmetric arrays while maintaining directional control capability.
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 assembly achieves optimal radiation patterns and beam directionality towards LEO satellites, maximizing link quality while adhering to size constraints, thereby improving communication efficiency and aerodynamic considerations.
Implementation Method 1
a plurality of antenna elements including a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element
Implementation Method 2
dynamic phased array control and beam steering, enhancing antenna performance
Data Source
AI summary
An aviation antenna assembly may include a base portion for operably coupling the antenna assembly to an aircraft body, a support platform, and a plurality of antenna elements including a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element. The support platform may be operably coupled to the base portion to support each of the first, second, third and fourth antenna elements uniformly distributed about a central axis. The support platform may support the first antenna element opposite the third antenna element relative to the central axis, and support the second antenna element opposite the fourth antenna element relative to the central axis. A line intersecting a center of the first and third antenna elements may form a 45° angle relative to a line of symmetry passing through the antenna assembly.