FMCW Radar Delay Device Using Programmable Single Chip
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Solution Overview
Problem
Existing delay devices for FMCW radar systems require complex configurations with multiple RF or optical cables, switches, amplifiers, and converters, leading to increased costs and inefficiencies, especially when measuring distances for remote targets due to significant cable losses.
Innovation Solution
A delay device utilizing a programmable single chip delay line within a transceiver that inputs control settings for time delay, Doppler frequency shift, and variable attenuation, allowing for accurate and easy variation of distance information with reduced components and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RF cables and switches are used to generate time delays, then various time delay types can be generated, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple separate components (RF cables, switches, amplifiers, attenuators) into a single integrated delay device that provides all delay functions through one unit, thereby reducing device complexity while maintaining adaptability
Solution Approach 2:
The delay device is designed to provide multiple functions (time delay generation, loss compensation, attenuation control) through a single integrated unit that can operate across different frequency ranges, making it universally applicable for various radar checking scenarios
2Loss of time
If RF cable length is extended to generate time delay for remote targets, then time delay range increases, but cable loss increases drastically
Solution Approach 1:
The patent introduces an intermediary approach by converting RF signals to optical signals for transmission through optical cables, which have significantly lower loss characteristics, then converting back to RF signals at the destination to achieve long time delays without excessive loss
Solution Approach 2:
The delay device incorporates variable attenuators and amplifiers that dynamically adjust signal parameters (attenuation levels, gain) to compensate for cable losses and optimize signal quality across different time delay settings
3Loss of energy
If optical cables are used instead of RF cables, then cable loss decreases, but device complexity and cost increase due to E/O-O/E converters
Solution Approach 1:
The patent merges the optical conversion functions (E/O and O/E converters) with the delay generation functionality into an integrated delay device, eliminating the need for separate optical conversion equipment and reducing overall device complexity
4Loss of energy
If variable attenuator and amplifiers are controlled separately for each delay type, then cable loss is compensated, but ease of operation decreases
Solution Approach 1:
The patent implements feedback control mechanisms where the system automatically monitors signal levels and adjusts attenuator and amplifier settings based on the selected time delay type, eliminating the need for manual separate control and improving ease of operation
Data Source
AI summary
The present disclosure relates to a delay device for checking a frequency modulated continuous wave (FMCW) radar, measuring a distance of a target and a relative velocity using microwaves and millimeter waves of a frequency modulated continuous waveform, and may include an input/output unit that is configured to input or output a control setting value, a controller that is configured to output a control signal corresponding to the control setting value input by an operator through the input/output unit, and a transceiver that is configured to delay an FMCW radar signal, for output, by a time delay corresponding to a distance of a target through a programmable single chip delay line according to the control signal of the controller, and configured to shift a frequency of the time-delayed FMCW radar signal by a Doppler frequency, and attenuate the frequency-shifted FMCW radar signal for output.