BEAM FORMATION NETWORK FOR RADIO FREQUENCY ANTENNA

摘要

PROBLEM TO BE SOLVED: To effectively mount architecture by connecting a first circuit layer and a second circuit layer by specified interconnection and constituting ranks of each cell to satisfy a specified condition. SOLUTION: Two circuit layers for constituting a set 5 [tertiary one- dimensional DFT [discrete Fourier transform(DFT)] of the first circuit layer and sets 7 to 9 [4×4 rectangular fast Fourier transform(FFT)] of the second circuit layer are constituted by the architecture. The first set 5 is constituted of the same 3×3 one-dimensional DFTs 51a to 54a, 51b to 54b, 51c to 54c and 51d to 54d. The sets 7 to 9 are constituted of the same 4×4 one-dimensional DFT cells. Then the ranks (i) of each cell of the mutual connection 6 in a first group is an equation ie 1, R} and the ranks (j) of each cell of first lines of the mutual connection 79, 89, 99 of a second group is an equation je 1, N}.