D. V. Tatarnikov - Dr.Sc. (Eng.), Professor, Department of Radiophysics, Antennas and Microwave Technique, Moscow Aviation Institute (National Research University); Antenna Design Chief, Topcon Positioning Systems, Inc. E-mail: DTatarnikov@topcon.com A. V. Astakhov - Ph.D. (Eng.), Associate Professor, Department of Radiophysics, Antennas and Microwave Technique, Moscow Aviation Institute (National Research University); Leading Antenna Design Engineer, Topcon Positioning Systems, Inc. E-mail: AAstakhov@topcon.com