Research Of Millimeter Wave Coformal Phased Array Antenna Design

As the vital development of the millimeter wave guidance technology, phased array antennas use electrical control scanning beam, which results to faster scanning velocity, more flexible beam control and higher anti-interference ability. Thus it can realize target seeking, tracing, guidance at the same time, and can work in the complex and worsening condition. With compensation of signal's time delay from different radiating element by phase shifters, phased-array antenna can control array beam easily. Because there are no mechanical devices for rotating beam, the phased-array antenna system can scan everywhere in beam covered areas in millisecand by stepping the phase shifters. It improves the tracking velocity of antenna towards the object, and becomes the development trends of weapon system antennas.Conformal microstrip antennas occupies no extra space,and have the great attraction in the area of aviation and guidance, so the study of conformal phased array microstrip antenna has one of the most important engineering value and defense purpose. Especially, designing conformal phased array antenna in such high frequency is a challenge subject.This paper consists of 3 sections: the theory and analysis of the conformal phased array, design of conformal array microstrip patch, and design and analysis of the millimetre microstrip conformal phased array. Based on the technology of phased array antenna application and development, this paper described the characteristic of the millimetre microstrip conformal phased array, the art-of-state and development trends both domestic and abroad.Phased-array radiation lobe is superposed by isometric array element with constant amplitude. Using the concept of real and imaginary space, the scanning lobe is researched. The directivity coefficient of the phased array antenna has been generalized and discussed. According to the formulations of microstrip antenna design theory, planar and cylindrical microstrip patch cell has been analyzed . We can conclude that the cylindrical microstrip patch cell has the performance of high gain, low thickness, high resonant frequency, uniform directivity diagram, and easy fabrication on missile body, so it is a good choice...