Antenna is built using substrate integrated waveguide (SIW) technology. <...> Simulated and measured characteristic of fabricated antenna are presented. <...> Waveguide-slot antenna arrays provide narrowing the radiation pattern in a plane passing through the axis of the waveguide. © Siberian Federal University. <...> All rights reserved * Corresponding author E-mail address: klemberg@sfu-kras.ru # 319 # Konstantin V. Lemberg, Oleg A. Nazarov… High Gain Ku-Band Substrate Integrated Waveguide Slot Antenna Array Waveguide-slot antenna arrays possess such benefi ts as possibility to realize optimal radiation pattern; ease of fabrication; lack of the protrusion parts of antenna. <...> In the last decade, a large number of papers are published describing the waveguide slot antenna arrays designed with substrate integrated waveguide (SIW) technology. <...> SIWs are integrated waveguidelike structures fabricated by using two rows of conducting cylinders or slots embedded in a dielectric substrate that electrically connect two parallel metal plates. <...> For example, the article [3] describes the waveguide slot antenna array consisting of eight linear arrays, each of which includes eight slots. <...> In this paper waveguide slot antenna array is designed which consists of sixteen linear arrays, each of which includes sixteen slots. <...> Design of SIW slot antenna array Linear waveguide-slot array antenna is a segment of the short-circuited SIW (substrate integrated waveguide) with radiation slots etched on the metal layer. <...> Planar slot arrays can be fabricated by placing linear arrays side by side. <...> The spacing between slots was set to 19.2 mm, then slot lengths and offset has been optimized for obtaining of best gain and radiation pattern. <...> Near-fi eld distribution measurement and radiation patterns retrieving were performed in the anechoic chamber by means of automated measuring system [6, 7]. # 320 # Fig. 1. <...> Measured S11 Konstantin V. Lemberg, Oleg A. Nazarov… High Gain Ku-Band Substrate Integrated Waveguide Slot Antenna Array Figure 4 shows the measured amplitude and phase distribution across the antenna array. <...> Antenna is built using substrate integrated waveguide (SIW) technology. <...> Simulated and measured characteristic of fabricated antenna are presented.! <...>