Research On UWB-HPM Radar Test System For Detecting Space Target And Its Correlative Technologies

With increasing emergence of targets, those are hard to be detected, in the high tech local war, higher defending-ability is required, and so it is very necessary to study the detection ability of the new system radar, such as impulse radar. The subject of the paper is to study the potential of an UWB transient signal for the stealth target detection, so the ultra-wideband high power microwave (UWB-HPM) radar test system for space target detection was established, and the UWB signal detection,the transmitting and receiving characterization of a time domain array and the realization of time/frequency-domain auto-measurement system were studied, according to the requirement of the system. The main contents are outlined as follows:1,An UWB-HPM radar experiment system for space target detection including a power synthesis solid state pulse source,an UWB planar horn antenna array for transmitting,an UWB slot antenna array for receiving,a quadrature demodulation receiver and a computer for controlling was brought forward based on the requirement of the application.2,The UWB target detection method was studied based on the wavelet analysis; The target detection technology based on wavelet multi-scale decomposition and generalized likelihood ratio was brought forward; Another target detection method based on energy feature of wavelet pack and LVQ neural networks was put forward, and the simulation results show that both methods are validity. The multi-period accumulation method according to the UWB target echo characteristic was brought forward, and the excellent result was obtained.3,The law of transmitting and receiving characteristic of time domain antenna array was obtained by analyzing the measure data using time-domain waveform,normalized energy pattern and normalized peak pattern, and the part of the analysis results were compared with the simulation results of FDTD.4,The frequency-domain Wideband RCS Auto-Measure System and the time-domain ultra-wideband pulse target measure system was designed for indoor range test, the two systems can provide ways for research on UWB target characteristic, and validate the test result of the radar experiment system.5,The target, which radar cross section (RCS) is very small in optical area, was detected triumphantly outdoor range many kilometer away by the radar experiment system, and the target detection law of impulse radar experiment system was obtained.