Design method of fully-polarized reconfigurable planar reflective array antenna technology

Abstract

The invention discloses a design method of a fully-polarized reconfigurable planar reflective array antenna technology, which comprises the following steps of: 1, designing a unit structure, 2, designing a reconfigurable planar reflective array antenna structure, 3, determining the position of a feed source and the polarization direction of an incident wave, 4, controlling a reflected wave beam by controlling the on-off state of a diode; and 5, simulating the reconfigurable reflective array antenna; the incident wave polarization direction of the reconfigurable reflective array antenna is set to be 45 degrees, so that the antenna units obtain equal-amplitude in-phase electric field components, meanwhile, according to the plane reflective array antenna principle and the electromagnetic wave polarization principle, the on-off states of diodes in the two directions of the units are independently controlled, full-polarization large-angle beam scanning is achieved. And through continuous orthogonal arrangement of the units in the array, the circular polarization axial ratio is effectively reduced, and the circular polarization purity is improved. Through a special diode coding mode, digital adjustment and change of reflected wave polarization and scanning angles are realized, a feed source does not need to be mechanically rotated, and the wave beam response time is shorter.

Description

technical field [0001] The invention relates to the technical field of reconfigurable reflectarray antennas, in particular to a design method of fully polarized reconfigurable planar reflectarray antenna technology. Background technique [0002] At present, a 1bit dual-band reconfigurable reflectarray antenna (RRA) is designed, which can generate two orthogonally polarized pencil beams. The RRA unit is a rectangular patch with two independently controlled PIN diodes. The RRA consists of 256 units, at 12.5GHz and 14.25GHz, with dual linear polarization (horizontal linear polarization and vertical linear polarization) and large-angle beam scanning capabilities; [0003] The prior art proposes a 2×2 subarray with a unique rotation angle and phase arrangement, which can make the array antenna have a lower axial ratio and a wider axial ratio bandwidth. The rotation angle of the unit is 0°, 90°, 180°, 270°; [0004] The existing method of the reconfigurable reflector array is t...

AI Technical Summary

Problems solved by technology

[0004] The existing method of the reconfigurable reflector array is to use a rectangular patch containing two PIN diodes as the reflector unit, and to achieve a dual-polarized reflected beam by mechanically adjusting the polarization of the incident wave. This method makes the response time of the antenna increase, and can only realize dual-polarized reflected beams simultaneously, and cannot realize fully polarized (+45 ° LP, -45 ° LP, LHCP and RHCP) reflected beams, therefore, the present invention proposes fully polarized reconfigurable planar reflective arrays Design method of antenna technology to solve the problems existing in the existing technology

Images