Impulse Radar with Variable Pulse Repetition for Dual-Range Detection
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Solution Overview
Problem
Monostatic radars are limited to either long-range or short-range operations, limiting their application, and existing radar systems struggle to efficiently operate in both modes while maintaining cost-effectiveness and signal sensitivity.
Innovation Solution
A pulsed radar system that dynamically adjusts between gated and non-gated modes based on target characteristics, using variable pulse repetition frequency and machine learning for target classification, to optimize detection of both short-range and long-range targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If monostatic radar operates in long-range mode, then detection distance is improved, but short-range detection capability is lost
Solution Approach 1:
The radar system dynamically switches between gated and non-gated modes based on operational requirements. The gated mode uses for long-range detection by filtering out close-range reflections, while non-gated mode enables short-range detection by accepting all reflections. This dynamic mode switching allows the single monostatic radar to adapt to different detection scenarios.
Solution Approach 2:
The system changes the receiver gating parameter to switch between operational modes. By adjusting the gate timing and duration in the receiver, the radar can selectively detect either long-range targets (with gated mode filtering close reflections) or short-range targets (with non-gated mode accepting all reflections), thus resolving the contradiction between detection distance and detection mode flexibility.
2Speed
If radar uses high pulse repetition frequency, then short-range detection is improved, but long-range detection capability deteriorates
Solution Approach 1:
The radar employs periodic gating in the receiver that synchronizes with the pulse repetition frequency. By using gated mode with appropriate gate timing, the system can operate at high pulse repetition frequencies for short-range detection while still enabling long-range detection through the gating mechanism that filters out close-range reflections during the gate-off periods.
3Adaptability or versatility
If radar operates continuously in both modes, then detection coverage is improved, but energy consumption increases
Solution Approach 1:
The radar system dynamically selects between gated and non-gated modes based on the detected target characteristics and operational requirements. The controller switches modes as needed rather than operating continuously in both modes, thereby maintaining full detection coverage while significantly reducing energy consumption by activating only the necessary mode for each operational scenario.
4Device complexity
If monostatic radar uses single operation mode, then device complexity is reduced, but application versatility is limited
Solution Approach 1:
The monostatic radar achieves multi-functionality by implementing both gated and non-gated modes within a single device. The gated mode enables long-range detection applications, while the non-gated mode enables short-range detection applications. This universal design allows one radar system to serve multiple detection purposes without requiring separate specialized radars, thereby increasing application versatility while maintaining relatively simple monostatic architecture.
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 system achieves cost-effective and sensitive detection of both short-range and long-range targets by dynamically adjusting operation modes, enhancing signal-to-noise ratio and reducing energy consumption.
Implementation Method 1
a transmitter transmits a waveform towards the target. The waveform is then reflected or retransmitted by the target towards a receiver
Implementation Method 2
The waveform is then reflected or retransmitted by the target towards a receiver
Implementation Method 3
The duration of time for the reflection or retransmission to reach the receiver, determines the distance between the transmitter and the target
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
An apparatus (12) including a transmitter (20) including a pulsed Radio Frequency (RF) source coupled to an antenna (66). A receiver (32) includes an amplifier coupled to the antenna. A controller (34) is configured to adjust one or more durations of a ranging cycle of the apparatus, wherein the ranging cycle includes a first duration (110, 130, 150) of a gated mode and a second duration (112, 132, 152) of a non-gated mode. The gated mode blinds the amplifier during a transmission of the transmitter. The non-gated mode reduces a gain of the amplifier during the transmission.