Array antenna Taylor-Schelkunoff polynomial design method

Abstract

The invention provides an array antenna Taylor-Schelkunoff polynomial design method, and relates to a modular array antenna. The method includes the steps that 1, array antenna parameters are selected; 2, the array antenna is divided into at least two modules; 3, a Taylor synthetic method is selected to calculate an array factor directional diagram of the modules; 4, an SPM synthetic method is selected to obtain a directional diagram with null steering, and the null steering angle is made to correspond to the grating lobe angle of the array factor directional diagram; 5, a directional diagram multiplication principle is adopted, the grating lobe of the array factor directional diagram is offset, the low-minor lobe radiation directional diagram is achieved, and the excitation amplitude of all arrays is controlled through the preset null steering angle; 6, if the obtained low-minor lobe radiation directional diagram cannot meet the design requirement, step 2 is executed, and the array antenna is regrouped. According to the array antenna Taylor-Schelkunoff polynomial design method, the excitation amplitude of all the arrays can be controlled through the preset null steering angle, a modular feed network is achieved through an equipower distributor with the phase and impedance being matched, the radiation loss is reduced, and the design and manufacturing cost is lowered.

Description

technical field [0001] The invention relates to a modularized array antenna, in particular to an array antenna Taylor-Sekunoff polynomial (Taylor-SPM) design method including null trapping and module feeding optimization. Background technique [0002] Modern wireless communication systems, especially long-distance communications such as radar, navigation, and satellite communications, often require the antennas at the transmitting and receiving ends to have radiation characteristics with low sidelobe levels, so that the system has better anti-interference, anti-anti-radiation capabilities and suppression clutter and other capabilities. To meet this requirement, several antennas are often arranged to form an array antenna. The array antenna can be processed directly by the Taylor synthesis method. Although the sidelobe level value of the radiation pattern can reach the preset value, the feed network is often complicated due to the different excitation amplitudes of each arra...

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Problems solved by technology

However, the above methods have not realized the on-demand controllability design, and have not comprehensively considered the mutual influence factors of the side lobe, the feeding mode and the excitation amplitude, and their application often has great limitations.

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