Design of Measuring Control Unit of Antenna Pattern of High Frequency Surface Wave Radar

In order to solve the problem that the measurement of sea current flow direction of HF surface wave radar is inaccurate due to the using of theoretical antenna pattern to calculate sea current, thus lead to the insufficient measurement accuracy of vector synthetic sea current field, which is difficult to meet the requirements of high-precision ocean observation. The design idea of HF surface wave radar antenna pattern measuring control unit based on DDS technology is proposed in this paper. This unit is composed of a DDS chip, a power control module, a MCU, a communication interface and other parts. The operating frequency can be adjusted according to the actual working frequency band of radar. After the hardware scheme is proposed, the software flow of measuring control unit is designed. The reliability of system software is verified by testing, and the mechanism analysis is carried out on the deficiencies of the hardware design. The optimized test results show that: The measuring control unit of HF surface wave radar antenna pattern can respond to remote control instructions from the host computer or digital transmission radio in real time, and parameters such as frequency, amplitude can be set. It is suitable for loading on an unmanned ship. It has the characteristics of high frequency resolution, stable transmitting power and good practicability. It has important application value to effectively improve the accuracy of sea current observation by HF surface wave radar.