tailieunhanh - Wave Propagation Part 16

Tham khảo tài liệu 'wave propagation part 16', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 517 A Statistical Theory of the Electromagnetic Field Polarization Parameters at the Scattering by Distributed Radar Objects X X p 7T. The physical analog of the point at infinity is the dihedral corner reflector. All points of the imaginary axis correspond to the objects with R J j 0 . Xj x . In this case the points laying on the positive imaginary semi-axis present radar objects which are characterized by the phase shift p 0 while the negative imaginary semi-axis Fig. 5. The complex plane of radar objects lm J 0 depicts the objects with p 0 . The points i present the objects having p n12 phase shift. All real axis s points of the complex ịi -plane correspond to the objects with zero phase shift 0 i. e. lmJ J 0 . However the given case is complicated by the fact that the object which corresponds to the point at infinity is the dihedral reflector. This contradiction can be solved considering the equality siny 0 both for p 0 and p 7t cases. Then the points of the real axis of the complex ịi -plane must be determined with the use of the conditions cos0 l cos -l as Re i xl2-X2 x2 X2 2X1X cJ. Thus into the interval ReỊ ỹỊ 0 ReỊ ỹỊ l the value 2 reduces from 2j 2 in the origin up to 2 0 in the point R J j 1 horizontal oriented object . This point depicts the degenerated radar object long linear object dipole . polarizer . The phase shift in the point has an undefined value. It changes spasmodically by 71 when passing the point R J J 1 . Then the value 2 increases from 2 0 in the point R J J 1 up to 2j 2 the point at infinity . In this case the phase shift along the ray R J j 1 R J j x equals to 71. The similar analysis can be made with respect to the negative semi-axis R J j . Thus the complex ịi -plane has the properties equivalent to the properties of the circular complex plane . However at that time when the circular complex plane presents the polarization properties of electromagnetic waves the complex ịi -plane is intended for presentation of the invariant .