X-band Phased Array Antenna (8 ~ 12ghz),

In this dissertation,the T/R module, characteristic of radiation, Magnitude distribution of the aperture and the the way of feed of the phased array antennas are analysed according as the basic theory of the phased array antennas.The scaning characteristic of a 10×10 array antennas is simulated . The way of feed, characteristic of radiation, impedance characteristic of the microstrip patch antenna according as the basic theory of the microstrip patch antenna(Vivaldi antenna). A 8-12GHz,double-face,tapered slot antenna of the microstrip is designed .The designed antenna is made by the medium with the lower relative dielectric constant . Integrate Balun structure is used for the feed. The antenna has the great bandwidth and great 3dB beam-width( 90 0). It is suitable for appliance in the phased array antennas in this frequency range.The characteristics of the impedance matching and direction are emphasized In this dissertation. In the research of the Vivaldi antenna, the designers pay more attention to the characteristics of band-width. However, the characteristics of the beam are not abtained sufficient study. Except the characteristics of the bandwidth,the characteristics of the beam are emphasized in this dissertation. The experiment has been done and the expecting result has been obtained. In addition, a 8-12GHz antenna and a 12-18Ghz antenna of the wave-guide filled medium are designed. The beam-width is both greater than 90°.