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Beam scanning and forming can be achieved by coupled oscillators array without phase shifter. Active antenna array based on coupled oscillators array has the vir-tue of low cost, high integration, and high efficiency. Traditional two dimensional coupled oscillators array has been arranged on rectangular lattices, and phase difference of adjacent elements is limited to [?90°, 90°]. Therefore, the beam scan-ning range is limited to [?30°, 30°] from normal for half wavelength element spacing. A new two dimensional coupled oscillators array with rhombus structure is pre-sented. Phase control method and phase error of the array are also provided. Sta-bility of the array is analyzed, and stable condition is given. When this coupled os-cillators array with rhombus structure is used in active antenna array, theoretical results show that phase difference of adjacent elements reach the limit of [?180°, 180°] along the horizontal and vertical directions. Therefore, it has wider beam scanning range than that of a rectangular lattice structure.
Beam scanning and forming can be achieved by coupled oscillators array without phase shifter. Active antenna array based on coupled oscillators array has the vir-tue of low cost, high integration, and high efficiency. Traditional two dimensional coupled oscillators array has been arranged on rectangular lattices, and phase difference of adjacent elements is limited to [? 90 °, 90 °]. Thus, the beam scan-ning range is limited to [? 30 °, 30 °] from normal for half wavelength element spacing. A new two dimensional coupled oscillators array with rhombus structure is pre-sented. Phase control method and phase error of the array are also provided. Sta-bility of the array is analyzed, and stable condition is given. When this coupled os-cillators array with rhombus structure is used in an active antenna array, theoretical results show that phase difference of adjacent elements reach the limit of [? 180 °, 180 °] along the horizontal and vertical directions. Thus, it has wider beam scannin g range than that of a rectangular lattice structure.