Control device for realizing fast variable polarization of electromagnetic wave

Abstract

The invention discloses a control device for realizing fast variable polarization of an electromagnetic wave. The device comprises an attenuator, a phase shifter, a power amplifier and an antenna A, wherein the attenuator, the phase shifter, the power amplifier and the antenna A are successively connected in a branched circuit A. The device further comprises an attenuator, a phase shifter, a poweramplifier and an antenna B, wherein the attenuator, the phase shifter, the power amplifier and the antenna B are successively connected in a branched circuit B. The antenna A and the antenna B are orthogonally placed in an oblique 45-DEG manner. A radar signal which is generated by a radar signal source is divided into two paths through a power divider. One path of the radar signal flows over thebranched circuit A, and the other path of the radar signal flows over the branched circuit B. The radar signal which flows over the branched circuit A successively passes the attenuator, the phase shifter and the power amplifier, and afterwards is fed into the antenna A. The radar signal which flows over the branched circuit B successively passes the attenuator, the phase shifter and the power amplifier, and afterwards is fed into the antenna B. The signal which is radiated from the antenna A and the antenna B is in a synthetic polarization state in a space. The device according to the invention can quickly realize variable polarization and can simulate modern enemy air early-warning radar electromagnetic interference and clutter interference prevention, and an electromagnetic wave fast variable polarization characteristic with improved target identification reliability.

Description

technical field

[0001] The invention relates to the technical field of target simulators, in particular to a control device for realizing rapid change in polarization of electromagnetic waves. Background technique

[0002] Polarization refers to the shape and handedness of the spatial trajectory formed by the endpoints of the electric field vector as a function of time during the propagation of electromagnetic waves. According to the direction of rotation of the endpoints of the electric field vector and the shape of the trajectory, polarization can usually be divided into two categories, one is linear polarization, and the direction of the electric field vector of linear polarization is fixed during the propagation process, such as horizontal polarization and Vertical polarization is a special case of linear polarization; the other type is rotational polarization. The direction of the electric field vector of rotationally polarized waves changes in rotation, and its shape i...

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