Phase-Adjustable Injection-Locking Circuit for Radar Transceivers
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Solution Overview
Problem
Injection locking technologies face challenges such as complexity, high power consumption, limited lock range, undesirable amplitude, and phase variations, which affect efficiency in various applications including radar transceivers.
Innovation Solution
The use of a feedback or feed-forward loop to adjust the phase of an output signal based on phase differences between the injection signal and the amplified output signal, utilizing a mixer and lock-detection circuit to detect lock-status and adjust the phase, and generating an FM continuous wave (FMCW) chirp signal when locked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional injection locking is used to generate output signals, then the system can achieve signal amplification, but the device complexity increases and power consumption increases
Solution Approach 1:
The patent extracts and removes the phase adjustment function from the main injection locking path by using a separate feedback loop that detects phase differences and applies corrections only when needed. This separates the core injection locking operation from the phase control mechanism, reducing the complexity and power consumption of the primary signal path while maintaining phase accuracy when required.
Solution Approach 2:
The patent implements a feedback mechanism where the phase of the output signal is detected and compared with the injection signal phase. The detected phase difference is then used to adjust the output signal phase through a feedback loop, enabling automatic phase correction without continuous monitoring and power consumption.
2Adaptability or versatility
If traditional injection locking is used, then signal amplification is achieved, but the lock range is limited
Solution Approach 1:
The patent makes the phase adjustment dynamic by continuously monitoring the phase relationship between injection and output signals and adjusting the output phase in real-time based on detected differences. This dynamic adjustment allows the system to adapt to varying operating conditions and maintain reliable locking across a broader frequency range.
Solution Approach 2:
The patent changes the phase parameter of the output signal based on detected phase differences between the injection signal and output signal. By dynamically adjusting this parameter, the system expands its operational lock range while maintaining locking reliability across different frequencies and conditions.
3Device complexity
If injection locking is implemented without phase adjustment, then the system is simpler, but amplitude variation increases
Solution Approach 1:
The system performs self-correction of phase variations through automatic detection and adjustment. The feedback loop continuously monitors phase differences and automatically adjusts the output signal phase without external intervention, maintaining amplitude stability while keeping the overall system relatively simple.
4Measurement precision
If phase adjustment is continuously applied, then phase accuracy is improved, but power consumption increases
Solution Approach 1:
Instead of continuous phase adjustment, the system uses periodic detection and adjustment based on detected phase differences. The feedback loop operates periodically to detect phase errors and apply corrections only when deviations are detected, maintaining phase accuracy while reducing unnecessary power consumption during stable operation.
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 approach enhances the efficiency of injection locking by increasing the range of frequencies for locking and reducing amplitude variation, improving the overall performance of injection-locking implementations.
Implementation Method 1
a feedback circuit to ascertain differences in phase between the injection signal and an amplified version of the output signal
Implementation Method 2
the lock-detection circuit detects a lock-status relationship between the injection signal and an output signal from the injection-locking circuit
Data Source
AI summary
Aspects of the present disclosure are directed to injection locking and related apparatuses. As may be implemented in accordance with one or more embodiments, an apparatus includes a plurality of injection-locking circuits configured to receive an injection signal, each injection-locking circuit including a mixer and a lock-detection circuit. In each of the injection-locking circuits, the lock-detection circuit detects a lock-status relationship between the injection signal and a signal output from the injection-locking circuit. In response to the lock-status relationship indicating an unlocked condition, a phase/magnitude of the injection signal is adjusted. In response to the lock-status relationship indicating a locked condition, transmission of an FM continuous wave (FMCW) chirp signal is facilitated.