Electronically Steered Weather Radar Phase Control
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Solution Overview
Problem
Conventional aircraft weather radar systems rely on moving parts that add weight, are prone to reliability issues, and are slow to scan large angles, making them inefficient for quickly detecting meteorological formations across different areas of the sky.
Innovation Solution
An electronically steered weather radar system utilizing a plurality of transmit/receive modules and antenna modules, with a system signal processor that adjusts the phase of RF signals to form and steer a system beam through various azimuth and elevation angles, eliminating the need for mechanical movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical steering mechanisms are used to move the antenna, then the antenna can be oriented to transmit or receive in different directions, but the system adds weight to the aircraft and is prone to wear and reliability problems
Solution Approach 1:
The patent replaces the mechanical antenna steering system with an electronic beam steering system. Instead of physically moving the antenna using motors and mechanical linkages, the system uses phase shifters to electronically control the direction of the radar beam. This substitution eliminates mechanical wear and improves reliability while maintaining the ability to steer the beam across different azimuth and elevation angles.
Solution Approach 2:
The patent divides the antenna system into multiple independent antenna elements arranged in an array. Each element can be independently controlled with its own phase shifter, allowing the beam to be steered by adjusting the phase of individual elements rather than moving the entire antenna mechanically. This segmentation enables electronic steering without mechanical moving parts.
2Adaptability or versatility
If mechanical steering mechanisms are used to move the antenna, then the antenna can scan different areas of the sky, but the mechanisms are slow to move the antenna over large angles of motion
Solution Approach 1:
The electronic beam steering system allows instantaneous changes in beam direction by adjusting phase shifters, eliminating the mechanical inertia and speed limitations of physical antenna movement. The beam can be redirected to any azimuth or elevation angle immediately, enabling rapid scanning of large sky areas.
Solution Approach 2:
The system dynamically adjusts the phase of each antenna element in real-time to change beam direction. This dynamic electronic control allows the beam to be steered across wide angular ranges at high speeds, far exceeding the mechanical movement capabilities of conventional systems.
3Ease of operation
If mechanical steering mechanisms are used to move the antenna, then the antenna can be positioned at different angles, but the moving parts add weight to the aircraft
Solution Approach 1:
The patent replaces heavy mechanical steering components (motors, gears, linkages, and structural supports) with lightweight electronic phase shifting circuits. The antenna array itself remains stationary and lightweight, while electronic components control the beam direction, significantly reducing the overall weight of the radar system.
Solution Approach 2:
The patent extracts and removes the heavy mechanical steering mechanisms from the antenna assembly. By separating the steering function from the physical antenna movement, the system eliminates unnecessary weight while retaining the positioning capability through electronic beam control.
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
Enables rapid and efficient scanning of the sky without mechanical parts, improving reliability and reducing weight, allowing for quicker detection of meteorological formations across a wide range of angles.
Implementation Method 1
Each transmit/receive module may be configured to adjust the phase of a radio frequency (RF) signal to be transmitted and received
Implementation Method 2
The antenna modules may form an antenna array configured to transmit a system beam in a direction determined by the phase of the RF signal from each transmit/receive module and to generate the RF signal from the received system beam
Data Source
AI summary
An electronically steered weather radar system comprises a plurality of transmit/receive modules, a plurality of antenna modules, and a system signal processor. Each transmit/receive module may be configured to adjust a phase characteristic of a radio frequency (RF) signal to be transmitted and received. Antenna modules may be in communication with transmit/receive modules and may form an antenna array configured to transmit a system beam in a direction determined by the phase of the RF signal from each transmit/receive module and to generate the RF signal from the received system beam. The system signal processor may be configured to perform a first scan to detect meteorological formations wherein the system signal processor communicates with each transmit/receive module to adjust a phase characteristic of the RF signals such that the antenna array transmits and receives the system beam through a plurality of azimuth angles and a plurality of elevation angles.