Е.V. Ilin - Ph.D. (Eng.), Associate Professor, Department of Radio, Antenna and Microwave Technology, Moscow Aviation Institute (National Research University). E-mail: jenyay.ilin@gmail.com А.Е. Zaikin - Ph.D. (Eng.), Senior Research Scientist, Department of Radio, Antenna and Microwave Technology, Moscow Aviation Institute (National Research University). E-mail: antenna@mai.ru P.А. Ageev - Research Scientist, JSC «Scientific Research Institute of Instrument Name Centuries Tikhomirova». E-mail: 4duskfall@gmail.com

The new generation of multifunction airborne radioelectronic complexes has to replace a set of different radio systems and solve their missions, including radio communication, telemetry, supplementary radar, guiding, electronic warfare, identification friend or foe etc. These new complexes require multipurpose wideband electrically steerable array antenna, which allow to reduce the number of dedi-cated antennas thus providing weight reduction and aircraft\'s aerodynamics improvement. This article presents the results of designing and analysis of solutions for wideband linear electrically steerable array antenna, which has to be arranged inside of radome-covered conducting cavity of aircraft\'s wing. As well, results of array antenna radiator\'s parameters optimization are presented which were obtained with FDTD-based method of computer simulation and genetic algorithm of global extremum search. The array antenna is arranged within quite limited internal volume of controlled slat of leading edge of aircraft\'s wing. Basic design parameters to be provided: frequency range - 1-3,0 (1-1,6) GHz; electrical scanning sector ? ±(45-60); polarization - linear, vertical; SWR - less than 2,0 (broadside mode) and 3,0 (while scan); dimensions (cross-section) ? less than 0,2λmax × 0,25λmax. Promising radiating elements for frequency range of 1,0-3,0 GHz are reduced-size screened Vivaldi antenna and printed monopole which shape is similar to Vivaldi antenna\'s reversed footprint; printed dipole log-periodic antenna is studied to cover 1,0-1,6 GHz band. Array antennas based on these three types of radiators demonstrate the following SWR values in appropriate frequency range (maximum values in broadside/scan modes are given): 2,3/3,5, 3,75/2,75 and 1,8/2,15. Twelve- and 24-element array arrangements were designed and studied. Array antenna pattern for all the above radiator types is typical for linear array: H-plane pattern is narrow, with no grating lobes and any other bugs; E-plane pattern 3 dB width exceeds 70.

 

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