Radar Sensor Combined Circuit Oscillator Coupling
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Solution Overview
Problem
Current radar sensors are limited in their ability to switch between radar and communication modes efficiently, lacking the capability for real-time bidirectional communication, which is essential for applications like automotive systems that require simultaneous object detection and data exchange between mobile vehicles.
Innovation Solution
A combined radar and communication circuit that utilizes two oscillators, where a coupling mechanism allows them to oscillate at the same frequency in radar mode and different frequencies in communication mode, enabling efficient switching between radar and communication functions using adjustable tuning voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate radar and communication circuits are used, then radar performance and communication performance can be optimized independently, but device complexity and size increase
Solution Approach 1:
The patent combines radar and communication circuits into a single integrated device that shares common components including oscillators, amplifiers, mixers, and antennas. The radar circuit and communication circuit are merged at multiple levels, allowing the system to achieve both radar and communication functions without requiring completely separate hardware systems, thereby reducing overall device complexity while maintaining performance.
Solution Approach 2:
The integrated circuit is designed to perform multiple functions - both radar detection and wireless communication - using the same hardware resources. The oscillators, amplifiers, and antennas serve dual purposes depending on the operational mode, making the device universal and eliminating the need for separate dedicated circuits for each function.
2Reliability
If two oscillators are electromagnetically coupled to oscillate at the same frequency, then radar mode performance is improved, but frequency flexibility for communication mode is reduced
Solution Approach 1:
The coupling between the two oscillators is made dynamic and controllable rather than fixed. A control mechanism adjusts the coupling strength based on the operational mode - strong coupling is applied when radar performance is needed (oscillators locked to same frequency), while weak coupling is applied when frequency flexibility is needed for communication operations. This dynamic adjustment resolves the contradiction between stable radar performance and frequency adaptability.
Solution Approach 2:
The system changes the coupling parameter between oscillators depending on operational requirements. By adjusting the coupling strength from strong to weak, the system can switch between radar mode (where identical frequencies are beneficial) and communication mode (where frequency flexibility is beneficial), effectively resolving the contradiction through parameter modulation.
3Adaptability or versatility
If weak coupling is provided between oscillators, then frequency flexibility for communication is improved, but radar mode performance deteriorates
Solution Approach 1:
The coupling between oscillators is made dynamic rather than static. The system can switch between weak coupling (for communication mode with frequency flexibility) and strong coupling (for radar mode with synchronized frequencies) based on operational requirements. This dynamic control resolves the contradiction by allowing the coupling strength to adapt to the current operational mode.
4Device complexity
If integrated combined circuit is used, then device size and cost are reduced, but switching efficiency between radar and communication modes is worsened
Solution Approach 1:
The integrated circuit incorporates dynamic control mechanisms that rapidly adjust oscillator coupling and signal routing based on the desired operational mode. This dynamic control enables fast switching between radar and communication modes despite the shared hardware architecture, preventing switching delays that would otherwise result from the integration.
Solution Approach 2:
The system uses parameter changes in the coupling mechanism and signal routing to enable rapid mode switching. By modulating the coupling strength and signal paths, the integrated circuit can efficiently transition between radar and communication operations without significant performance degradation, maintaining productivity despite hardware sharing.
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 provides a high-performance, cost-effective, and compact radar sensor with reliable bidirectional communication capabilities, suitable for automotive and other applications, by allowing seamless switching between radar and communication modes while maintaining high-frequency operations.
Implementation Method 1
a coupling is provided, configured to electromagnetically couple the first oscillator with the second oscillator
Implementation Method 2
the coupling is configured to electromagnetically 'de-couple' the first oscillator from the second oscillator
Data Source
Figure 1~2a
Figure 2b~3
Figure 4
AI summary
Radar sensor (10), comprising a combined circuit (40) with radar and communication capabilities, configured to assume a radar mode, in which radar signals are emitted and received, and a communication mode, in which communication signals are emitted and received, wherein the radar sensor comprises a coupling (58), configured to electromagnetically couple a first oscillator (41) of a transmit path with a second oscillator (51) of a receive path of the combined circuit, when the radar sensor is in communication mode, such that the first oscillator and the second oscillator are encouraged to oscillate at the same frequency.