Method for simulating and calculating phase center of electric scanning array antenna based on moving and rotating reference system

Abstract

The invention relates to a method for simulating and calculating a phase center of an electric scanning array antenna based on a moving and rotating reference system. A scanning reference frame is established, it can be ensured that the amplitude and phase distribution of an electric field in a beam far field main lobe can be reflected objectively and comprehensively, and the far-field data of the E surface and the H surface in the main lobe can be completely obtained no matter how the beam scans and changes, so that the phase center of the antenna at any actual scanning angle can be conveniently determined; a phase center displacement reference coordinate system is proposed for the first time, and the shackle of a traditional fixed global reference coordinate system is jumped out; the method has the significance that the phase center displacement coordinate system rotates along with the beam direction by combining the beam rotation characteristic of the electric scanning array antenna; the horizontal coordinates of the phase center are decomposed into the axial direction X' perpendicular to the azimuth angle pointed by the wave beam and the axial direction Y 'coincident with the azimuth angle, the complexity of the phase center coordinates under the non-special azimuth angle is reduced, the obtained phase center data are more visual, and establishment and calculation of a phase center mathematical model in the later period are facilitated.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation communication and array antennas, and in particular relates to a method for simulating and calculating the phase center of an electronically scanned array antenna based on a moving rotating reference system. Background technique [0002] With the continuous improvement of GNSS receiver hardware technology and software algorithms, it has become a reality to use carrier phase observations to obtain centimeter-level or even sub-centimeter-level positioning accuracy. GNSS carrier phase observations are obtained with the antenna phase center as the measurement point. Due to the characteristics of the antenna itself, there is generally a deviation between the antenna phase center and the ARP, that is, the antenna phase deviation, which directly affects the elevation component in the positioning result. With the increasing anti-jamming requirements of navigation systems, array antennas with...

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Problems solved by technology

In addition, the previous phase center simulation measurement methods all describe the coordinates in a single absolute coordinate system, and the obtained coordinate data are usually messy and difficult to process and generalize

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