DESIGN AND OPTIMIZATION OF LINEAR PHASED ARRAY HORN ANTENNA FOR HIGH POWER APPLICATION

Abstract

Design and optimization of linear phased horn array antenna for high power application are comprised more than two radiating elements. Each of the elements comprises a first conducting plate integrated with a second conducting plate. The second conducting plate constitutes the first conducting plate of the next successive radiating element. Each of the radiating elements comprises a closed end absorptive back wall and a coaxial connector. The main objective of this project is structurally Modified High Power Ultra Broadband Phased Array Antenna for Extending the Operating Frequency Range (6 to 18 GHz) and improving the VSWR. The amplitude and phase of the input power of each element control the beam width and angle of maximum scan of the array antenna. The use of phased array antenna permits the achievement of desirable applications such as the steering of the beam with simple elements with little intrinsic capability. Many application of phased array antennas in modern electronics system like Radar, satellites communication, trackers, jammers etc. Normally Jammers use high power antenna and also in military applications. Specially jammer antenna are critical mission and always operate continuously over long periods an transmit high power RF signals in a desired direction to provide effective jamming on threat fire control radars ,supporting the missiles. In such applications, involved high power transmissions where the ports of the phased array antenna elements are simultaneously fed with SMA connector with back wall. After using conventional method and also placing tunable rod mouth of antenna still could not achieved the desired VSWR over frequency range.Therfore we tried structure modification to the aperture of the array and many experiments have been carried out to evolve mechanism for improving the VSWR over 6-18 GHz frequency band. The modeling of the design is carried out using both the advanced software tools i.e. SOLIDWORKS and dimensions of the model created for simulation of the antenna element in CST Microwave Studio.