Reversely deducing prediction method of electromagnetic coupling between large array antennae of ship

Abstract

The invention provides a reversely deducing prediction method of electromagnetic coupling between large array antennae of a ship. According to an electromagnetic coupling theory of a transmitting array antenna to array elements of a receiving array antenna, a full-wave electromagnetic model is built for a transmitting array antenna model machine and a receiving array element antenna, and premixing simulation solving is carried out on a coupling field of the transmitting array antenna model machine by adopting a consistency diffraction theory and a vector overlaying method on the basis of an amplitude-phase combination theory; an electromagnetic coupling test on a local array antenna is carried out in an open area test site, result of the electromagnetic coupling test on the local array antenna is compared and verified with a network parameter model, and a quantizing factor under an actual condition is used for correcting an interference field propagation model to ensure that simulation calculation is matched with the test result. The method provided by the invention gives play to the accuracy advantage of a full-wave numerical method, and provides an interface for simulation test correction, and the problem of overdesign or underdesign caused by the simulation calculation carried out under an ideal state is solved by reversely deducing.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility prediction and design of ship platform system level, in particular to a large-scale array antenna electromagnetic compatibility prediction and optimized layout design under the state of ship radio frequency integration. Background technique [0002] Conformal installation of multiple groups of large-scale array antennas with different functions on the ship's superstructure can realize powerful RF functions and the integration and flexible deployment of RF resources. However, due to the large transmit power and wide operating frequency of the ship-borne array antenna, the close layout of multiple groups of array antennas will cause serious electromagnetic coupling interference with each other. It is necessary to guide and support the optimal layout of the array antennas through accurate prediction in the design stage. [0003] At present, the electromagnetic coupling predictio...

AI Technical Summary

Problems solved by technology

[0004] (1) The simulation calculation mainly adopts the full-wave numerical method, which requires full-scale grid discretization of the simulation object. For the calculation of electromagnetic coupling between large-scale array antennas of ships, the large-scale phased array with thousands of array elements will be Generate hundreds of millions of grids. If the ship structure with a large electric wavelength size is considered, the number of unknowns will exceed the solving ability of the most advanced computer at present, and the solution of the equation system cannot converge

Therefore, the numerical method is only applied to the prediction of the electromagnetic coupling of small array antennas with hundreds of elements

[0005] (2) In the design and development stage, the conditions for using a complete large-scale array antenna to carry out mutual electromagnetic coupling simulation tests are not yet available, and only a partial array antenna prototype can be used

The number of elements and beam directionality of the partial array antenna prototype and the complete array antenna are different, and there are nonlinear factors. The electromagnetic coupling data between the partial array antennas cannot be accurately converted to the electromagnetic coupling data between the complete large array antennas.

Therefore, it is still impossible to predict the electromagnetic coupling characteristics between large array antennas on ships by only using the simulation test method

[0006] Retrieving domestic and foreign literature, the prediction method of electromagnetic coupling between large array antennas of ships is still blank

Images