Advances in Radio Science www.adv-radio-sci.net 1684-9965 1684-9973 7 Kleinheubacher Berichte 2008 2009 10.5194/ars-7-267-2009 http://www.adv-radio-sci.net/7/267/2009/ http://www.adv-radio-sci.net/7/267/2009/ars-7-267-2009.html http://www.adv-radio-sci.net/7/267/2009/ars-7-267-2009.pdf 267 271 2009-05-19 Array antennas design in dependence of element-phasing R. Zichner ralf.zichner@s2002.tu-chemnitz.de M. Chandra Chair of Microwave Engineering and Photonics, Chemnitz University of Technology, Germany Array antennas are used in science as well as for commercial and military purposes. The used element antennas act in accordance to their desired uses, for example radars or stationer GPS satellites. Typical components are for example slotted waveguides, patches, yagi-antennas and helix-antennas. All these elements do stand out with their own characteristics based on their special applications. If these elements are formed into an array configuration, the effectiveness can be improved immensely. There is a relation between the array functions and the physical array properties like the element alignment (linear, planar, circular), distances between the elements and so on. Among the physical properties there are other attributes like phase or amplitude coefficients, which are of great significance. The aim of this study was to provide an insight into the problem of array design, as far as the antenna element phase is concerned. Along with this, array radiation characteristics effects are presented. With the help of the extracted cognitions beam forming behaviour can be shown and the array phase behaviour can be analysed. One of the main applications is to simulate the array characteristics, like the radiation characteristic or the gain, for displacements of the array feeding point. A software solution that simulates the phase shift of a given array pattern is sought to adjust the feeding point. The Institute of Electrical and Electronics Engineers, Inc.: IEEE Std 145-1993, IEEE Standard Definitions of Terms for Antennas, ISBN 1-55937-317-2, approved March 18, 1993. Constantine A. Balanis: ANTENNA THEORY, Third Edition, Analysis And Design, Wiley-Interscience, ISBN: 0-471-66782-X, 2005.