Parameter Design Method of Millimeter-Wave Low Sidelobe Level Series-fed Microstrip Antenna with Quasi-Uniform Array Element Spacing

Abstract

The invention discloses a parameter design method of a millimeter-wave low-sidelobe-level series-fed microstrip antenna with a quasi-uniform array element spacing, which combines antenna parameters with electromagnetic field full-wave simulation software and differential evolution algorithm (Differential Evolution Algorithm, DEA) optimization. In the case of given constraints, the optimal solution of antenna element spacing, array element resonance length and array element width is obtained. Using DEA, the beam width, beam deflection angle, antenna array element spacing, array element resonance length and array element relative width can be input as optimization constraints. The serial-fed microstrip antenna realized by the parameters of the invention has the characteristics of low side lobe level. Compared with the equal-spaced Chebyshev ideal point source array, under the same beam width, the sidelobe level of the series-fed microstrip antenna with quasi-uniform element spacing is close to the sidelobe level given by the Chebyshev theoretical solution. flat.

Description

technical field [0001] The invention relates to a parameter design method of a millimeter-wave low-sidelobe-level series-fed microstrip antenna with a quasi-uniform array element spacing; based on a currently widely used series-fed microstrip antenna structure, the electromagnetic field full-wave simulation software is combined with a differential evolution algorithm (Differential Evolution Algorithm, DEA) jointly optimizes the spacing, array element width, and array element length of antenna elements, and belongs to the field of antenna technology. Background technique [0002] Antenna is an important part of wireless mobile communication system. With the rapid development of the fifth-generation mobile communication and the development and application of millimeter-wave frequency bands, there is an urgent need for millimeter-wave frequency band antennas with small size, low cost, high gain, and easy integration. Microstrip antennas have the advantages of easy conformality...

AI Technical Summary

Problems solved by technology

However, in the millimeter-wave frequency band, the mutual coupling effect between array elements and the parasitic radiation of the microstrip feeder are more obvious, and the width of the array element is not proportional to the amplitude of the array element. Manually adjust or use the electromagnetic field full-wave simulation software that comes with The optimization method can not achieve a given current amplitude distribution by adjusting the array element width

Therefore, in the case of narrow beams, it is impossible to obtain sidelobe levels close to the theoretical solutions of Chebyshev distribution or Taylor distribution at the same time

That is to say, the sidelobe level optimized by the electromagnetic field full-wave simulation software is often far from the sidelobe level given by the Chebyshev distribution theory or the Taylor distribution theory solution.

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