宽带瞬时精确测频技术及其应用

随着电磁对抗和雷达技术的不断演进，雷达信号由传统的连续波、单脉冲形式逐步向宽带线性调频、捷变频、跳频等复杂波形发展，常用的频率测量方法在测频精度和测频速度等方面很难满足要求。针对宽带相控阵雷达目标回波模拟器瞬时信号带宽高达2 GHz、扫频或随机跳频信号带宽覆盖整个工作频段的特点，创新性地采用瞬时测频引导结合实时宽带数字信道化精测频技术，设计研制了超宽带、高精度的瞬时测频模块和相应软件，并应用于宽带目标回波模拟器的研制之中。通过实测和半实物仿真试验验证，测频精度、测频范围和测频的实时性等指标完全满足整体性能要求。

Broadband Instantaneous Accurate Frequency-Measurement Technology and Its Application

With the continuous evolution of electromagnetic countermeasure and radar technologies, radar signal has gradually developed from the traditional continuous wave and monopulse form to the complex waveforms such as broadband linear frequency modulation, frequency agility, and frequency hopping. The frequency-measurement methods commonly used are difficult to meet the requirements in the aspects such as the frequency-measurement accuracy and the frequency-measurement speed. Aiming at the characteristics that the instantaneous signal bandwidth of broadband phased array radar target echo simulator is up to 2 GHz and the sweep or random frequency hopping signal bandwidth covers the whole working frequency band, in this paper, the technology of instantaneous frequency-measurement guidance combined with real-time broadband digital channelized precise frequency-measurement is innovatively adopted. An ultra-broadband and high-precision instantaneous frequency-measurement module and the corresponding software are designed, developed, and applied to the development of broadband target echo simulator. The results are verified by actual measurement and hardware-in-the-loop simulation test, and the indicators such as the accuracy, range, and real-time performance of the frequency-measurement can fully meet the overall performance requirements.