From the basic theory of radar antenna system, the structural layout method of three active-passive composite antenna system is discussed on the main confinement condition of dimension and space, and presented fresh greatly design schema on the basis of comparing goodness and badness.

In the guidance system of active-passive composite, aiming-line error that be caused the redome has certain difference with the condition of active seeker and passive seeker adopting respectively monopulse system of amplitude comparison and phase one.

A high-efficiency beam dividing system design was accomplished,which could be used in the receiving optical system of the active-passive composite image radar to divide the active beam from the passive beam.

Research on signal detection techniques in passive detection;

Based on analyzing the distance equation of MMW radiometer,we discuss the effect of MMW radiometer parameters and target s characteristics on detection distance from two directions of increasing and decreasing detection distance and raise the enhancing method of MMW passive detection function and the direction of MMW radiometric characteristics control.

In strong noisy jamming environment, it is possible for 2～3 neighbor jammed radars to change its work mode from active detection to passive detection, and to locate noisy source in the air.

In this paper,the methods for estimation of the time delay of a passive acoustic detection system are summarized and the advantages and disadvantages of existent methods on estimation of time delay are analyzed.

In the background of the research and development of simulation, test and evaluation system for passive acoustic detection network, the problem of data simulaton for passive acoustic detection network was discussed.

In order to improve the precision of the passive acoustic detection,this paper establish the high precision of the time delay.