A new structure using increased width waveguide to realize E plane filters was proposed and it has been able to reach wide bandwidth.

There is dominated spread clutter derived from the range-folded echoes in particular range bins,and targets located at that region would be submerged,that is a blind region for detection.

However, due to the complex propagation conditions of electromagnetic wave in HF band, many disadvantageous factors, such as phase path contamination and multimode propagation, will cause the neighboring target submerged in the spread clutter.

Analysis of sea clutter distribution based on wavelet transform;

The method to detect signal on the sea with strong sea clutter;

Review of modeling of sea clutter and target detection based on statistical models;