Twin-Fin Radar Module Coupling to Reduce Reflections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radar modules for plant monitoring and process automation face challenges in reducing the size of antenna and coupler components due to their design, which affects integration and performance, especially at high frequencies, and often suffer from interfering reflections and mechanical instability.
Innovation Solution
A radar module with a microwave chip that generates radar signals above 75 GHz, featuring a coupler with mirror-symmetric fins integrated directly on the chip, eliminating external bonding wires and using a dielectric-filled resonant cavity to reduce dimensions and enhance coupling efficiency, thereby minimizing reflections and mechanical exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional waveguide coupling with external bonding wires is used, then radar signals can be coupled into waveguide or antenna, but the device size increases and mechanical stability decreases
Solution Approach 1:
The coupler is integrated directly onto the microwave chip, merging the radar signal source and coupler into a single integrated structure. This eliminates external bonding wires and reduces the overall device volume while improving mechanical stability through direct integration.
Solution Approach 2:
A resonant cavity filled with dielectric material is introduced as an intermediary structure between the radar signal source and the waveguide/antenna coupling. This dielectric-filled cavity enables efficient signal coupling while maintaining a compact form factor and reducing mechanical exposure of critical components.
2Loss of energy
If conventional coupler design is used, then radar signals can be transmitted, but interfering reflections occur and coupling efficiency decreases
Solution Approach 1:
The operating frequency is increased to above 75 GHz (specifically 77 GHz or higher), which changes the electromagnetic parameters and allows for a more compact coupler design with improved coupling efficiency and reduced interfering reflections at the higher frequency regime.
Solution Approach 2:
The dielectric-filled resonant cavity acts as an intermediary that optimizes the coupling between the radar signal source and the waveguide/antenna. The dielectric material enhances the electromagnetic field confinement and coupling efficiency while minimizing harmful reflections through resonant effects.
3Volume of moving object
If high frequency radar signals (>75 GHz) are used, then antenna and coupler dimensions can be reduced, but manufacturing precision requirements increase
Solution Approach 1:
The coupler is merged with the microwave chip in an integrated design, eliminating the need for separate external components. This integration approach reduces the overall dimensions of antenna and coupler while managing manufacturing precision requirements through standardized chip fabrication processes.
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 solution allows for a compact, high-frequency radar module with improved coupling efficiency and reduced mechanical stress, enabling precise monitoring and automation in harsh industrial environments with minimal performance attenuation.
Implementation Method 1
a radar signal source configured to generate a radar signal having a frequency greater than 75 GHz
Implementation Method 2
a coupler, which is connected to the radar signal source... The coupler is arranged to couple the radar signal into the waveguide and/or antenna
Implementation Method 3
using a dielectric-filled resonant cavity to reduce dimensions and enhance coupling efficiency
Data Source
AI summary
A radar module configured for plant monitoring is provided, including a microwave chip having a radar signal source configured to generate a radar signal having a frequency greater than 75 GHz, and a coupler, which is connected to the radar signal source.