SIW Antenna Integration for Airborne Weather Radar Weight Reduction
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Solution Overview
Problem
Airborne weather radar systems using aluminum slotted array waveguide antennas are costly and heavy due to complex manufacturing processes and precise dimension requirements, limiting their use on smaller aircraft.
Innovation Solution
The implementation of a substrate integrated waveguide (SIW) antenna integrated with radar electronics and processors on a multi-layer printed circuit board, reducing weight and cost by simplifying manufacturing and integrating components into a single package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum slotted array waveguide antenna is used, then good transmit and receive performance is achieved, but weight and cost increase
Solution Approach 1:
The patent changes the material parameter from aluminum to plastic, and the structural parameter from slotted array waveguide to integrated SIW antenna. This parameter change maintains RF performance while significantly reducing weight and manufacturing complexity
Solution Approach 2:
The patent uses composite material construction by integrating the antenna with the plastic radome housing. The SIW antenna is formed within the plastic structure itself, creating a composite assembly that eliminates separate aluminum components while maintaining electrical performance
2Reliability
If aluminum slotted array waveguide antenna is used, then good transmit and receive performance is achieved, but manufacturing cost increases
Solution Approach 1:
The patent merges the antenna structure with the radome housing into a single integrated component. The SIW antenna is formed directly within the plastic housing structure, eliminating separate manufacturing and assembly steps for the antenna, thereby reducing cost while maintaining performance
Solution Approach 2:
The patent replaces the mechanical aluminum slotted array waveguide construction with an integrated plastic SIW structure. This substitution eliminates complex mechanical manufacturing processes such as braising and precision slot cutting, replacing them with more cost-effective plastic forming techniques
3Reliability
If precise dimension manufacturing is used, then RF performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the manufacturing approach from precision mechanical machining of aluminum to mold-based plastic forming. This parameter change in the manufacturing process inherently provides dimensional consistency without requiring complex precision machining operations, thereby reducing manufacturing complexity while maintaining RF performance
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 solution results in a lightweight, low-cost airborne weather radar system with improved performance and reduced complexity, enabling installation on smaller aircraft while maintaining effective detection and avoidance of hazardous weather conditions.
Implementation Method 1
a slotted array waveguide antenna, wherein the slotted array waveguide antenna is a substrate integrated waveguide (SIW) antenna... configured to output radar signals... configured to receive from the slotted array waveguide antenna radar reflections
Data Source
AI summary
A weather radar with an integrated flat plate slotted array antenna system mounted to a motorized, gimbaled platform. The integrated antenna system includes a substrate integrated waveguide (SIW) receiver/transmitter antenna integrated with other printed circuit board (PCB) layers. The PCB includes radar transmitter, receiver and processing circuits configured to communicate with weather radar display and controller units. A protective shield provides radio-frequency (RF) shielding and mechanical support for the integrated antenna system.