17:15 〜 19:15
[AOS12-P02] Optimization and Comparative Analysis of Custom Key Components for a High-Frequency Phased Array Radar System
キーワード：High-Frequency Phased Array Radar System, Key Components of Radar, Receiver Circuit Board of Radar & Bandpass Filter, Signal-to-Noise Ratio (SNR)
In 2019, the Taiwan Ocean Research Institute (TORI), National Applied Research Laboratories, deployed an 8 MHz high-frequency phased array radar system (KNTN) at Maobitou Park, Hengchun, to contiuniously collect sea surface dynamics. By receiving electromagnetic scattering echoes from the sea surface, the system retrieves real-time wave and current field information. To validate the radar's data, KNTN's radial velocity measurements were compared with buoy data and a nearby high-frequency coastal radar system, SeaSonde (BABY station). A baseline analysis conducted during a stable observation period in February 2021 revealed a maximum correlation coefficient 0.81, demonstrating the reliability of KNTN's data.
Despite its effectiveness, the system encountered challenges during operation, including limited observation range, environmental interference, and changes in the installation environment over time. To address these issues, custom bandpass filters and a modified receiver circuit board were developed to enhance signal reception and mitigate interference. Field experiments conducted in 2024 evaluated the performance of these components by analyzing radar echo spectra and key metrics such as background noise, effective signal strength, and signal-to-noise ratio (SNR) under both interference-prone and interference-free conditions.
The results showed that the custom bandpass filter outperformed the latest manufacturer’s filter in noise suppression during interference, while the modified receiver circuit board consistently delivered superior SNR across all scenarios. When the custom bandpass filter was paired with the modified receiver circuit board, the radar system achieved the best SNR performance, which significantly enhanced the authenticity of echo signals and laid a strong foundation for improving the quality of subsequent data products. The field experiments provided valuable insights into the optimal signal-matching configurations, and the results from this study serve as a foundation for subsequent analyses and further improvements.
Despite its effectiveness, the system encountered challenges during operation, including limited observation range, environmental interference, and changes in the installation environment over time. To address these issues, custom bandpass filters and a modified receiver circuit board were developed to enhance signal reception and mitigate interference. Field experiments conducted in 2024 evaluated the performance of these components by analyzing radar echo spectra and key metrics such as background noise, effective signal strength, and signal-to-noise ratio (SNR) under both interference-prone and interference-free conditions.
The results showed that the custom bandpass filter outperformed the latest manufacturer’s filter in noise suppression during interference, while the modified receiver circuit board consistently delivered superior SNR across all scenarios. When the custom bandpass filter was paired with the modified receiver circuit board, the radar system achieved the best SNR performance, which significantly enhanced the authenticity of echo signals and laid a strong foundation for improving the quality of subsequent data products. The field experiments provided valuable insights into the optimal signal-matching configurations, and the results from this study serve as a foundation for subsequent analyses and further improvements.