Radar Antenna Rotation Timing Control for Signal Density
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Solution Overview
Problem
Radar devices face issues with uneven signal density across azimuths due to fluctuations in antenna rotational speed, leading to coarse echo images and interference challenges.
Innovation Solution
A radar device configuration that includes a transmission timing signal generator synchronized with the antenna's rotational angle, ensuring consistent signal transmission density and allowing for simpler interference removal by varying transmission timing based on the antenna's rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transmission timing is set at constant time intervals based on constant antenna rotational speed, then the system is simple to operate, but signal density becomes uneven across azimuths due to rotational speed fluctuations
Solution Approach 1:
The transmission timing signal generator uses feedback from the rotational angle sensor to dynamically adjust transmission timing. The generator receives rotational angle information and generates transmission timing signals that compensate for speed fluctuations, ensuring uniform signal density across all azimuths while maintaining operational simplicity.
Solution Approach 2:
The system transitions from static constant-time-interval transmission to dynamic transmission timing based on real-time rotational angle. The transmission timing is continuously adjusted according to the antenna's actual rotational position and speed, making the system adaptive to speed variations while preserving ease of operation.
2Manufacturing precision
If transmission timing is adjusted based on rotational angle to maintain uniform signal density, then signal density uniformity is improved, but device complexity increases due to additional synchronization mechanisms
Solution Approach 1:
The patent combines the transmission timing signal generation function with the rotational angle sensing system. Instead of adding a separate complex synchronization mechanism, the transmission timing generator directly utilizes the existing rotational angle signal to produce timing pulses, merging two functions into one integrated system.
Solution Approach 2:
The transmission timing signal generator serves itself by using its own rotational angle detection capability to generate appropriate timing signals. The system uses its inherent rotational position information to automatically adjust transmission timing without requiring external complex synchronization equipment.
3Device complexity
If constant time interval transmission is used, then device complexity is low, but echo image quality deteriorates due to coarse signal density in certain azimuths
Solution Approach 1:
The system employs feedback from rotational angle sensing to continuously adjust transmission timing, ensuring that transmission pulses are evenly distributed across all azimuths regardless of speed variations. This feedback mechanism maintains low device complexity while significantly improving echo image quality through uniform signal density.
Solution Approach 2:
The transmission timing parameter is dynamically changed based on rotational angle rather than maintaining a fixed time interval. By changing the timing parameter in response to rotational position, the system achieves uniform signal density and improved image quality without substantially increasing complexity.
Data Source
AI summary
There is provided a radar device with which the density of transmitted signals can be made uniform in relation to orientation even if the rotation rate of an antenna fluctuates, and interference removal processing can be given a simpler configuration. A radar device that transmits and receives signals while rotating an antenna comprises a motor, a transmission pulse generator, and a transmitter. The motor rotates the antenna (antenna main body). The transmission pulse generator generates transmission timing pulses for transmission signals from the antenna based on the rotational angle of the antenna main body. The transmitter transmits transmission signals via the antenna according to the transmission timing pulses generated by the transmission pulse generator.