Abstract:

The instantaneous polarization new system radar extracts the characteristic information of the target by achieving the polarization scattering matrix instantaneously, and improves the ability of detecting, anti-interference and antistealth in complex electromagnetic environment. Based on the operation principle of this radar, the RF front end design scheme “simultaneous orthogonal double polarization” is proposed, and the first RF front for instantaneous polarization radar experiment system is manufactured in China. The technology of amplitudephase coherence for orthogonal channels is adopted to satisfy the function of the system.The lownoise amplify technology is adopted to decrease the noise coefficient of the receiver efficiently. The filter technology improves the pureness of frequency spectrum. The technology of indirect frequency synthesis improves the frequency stabilization and the coherent performance of the system. The structure integration design improves the EMC and the portable performance of the RF front end. The measured results of the system are better than the predetermined targets. And this RF front end helps the experiment system resolve extracting the polarization scattering characteristic of the targets and the basic difficult problem in identifying field.