Multi-Optimization Algorithm Integrated And Its Application In The Design Of Antenna

In recent years, with the rapid development of modern wireless communication technology, microwave system and design of the antenna become more and more complex, antenna index requirements and the function are increasing, while the size requirements are getting smaller and design cycle are becoming shorter. In engineering design, analysis and synthesis are complementary. The analysis problems in the design mainly rely on the computational electromagnetic or microwave EDA (ie, Electronic Design Automation) software, while the synthesis problems are mainly dependent on the optimization techniques. Research of the theory and algorithm for solving optimization problems has been one of the important issues in today’s mathematics and computer science. Microstrip antenna is widely studied and applied because of its low cost and easy to manufacture. Currently, the research hotspot of microstrip antenna is dual (or multi-frequency) technology. In the engineering design of the antenna, many optimization problems are complex, it’s difficult to solve these problems with the traditional methods, and therefore it has practical value to solve the problem of synthesis optimization design of the antenna with the aid of optimization algorithms.The paper first completes the integration procedures of multi-optimization algorithm based on the secondary development interface of typical electromagnetic simulation software by studying the basic characteristics of the four global optimization algorithms, which are genetic algorithm, differential evolution strategy algorithm, Taguchi algorithm and EGO algorithm, and the selective call of different algorithms and different software/programs is achieved. Then two antenna structures are optimized by using the multi-optimization algorithm integrated program:first, two switch positions design of the PIFA antenna chip is optimized by using the multi-optimization algorithm integrated program to complete the reconfigurable antenna design. The planar PIFA antenna realizes frequency reconfigurable by switching the two switches on the chip, simulation results show that the reflection coefficients of the antenna in GSM, DCS, PCS, ISM and LTE five bands are less than-6dB, the radiation pattern is saturated and omnidirectional to meet the communication requirements. Based on the traditional printed monopole antenna structure, the structure parameters sensitivity of the antenna need to be optimized is assessed by testing the design method (orthogonal matrix), the paper has chosen three parameters with great influence (the lengths of two minors and the height from the ground), optimized the antenna structure by using the multi-optimization algorithm integrated program, completed the optimization of the design of the antenna. Simulation results show that the antenna has achieved the dual-band (2.4GHz:2400-2484MHz,5GHz:5150-5825MHz) operating characteristics on the basis of miniaturization. The multi-optimization algorithm integrated program is verified to be practical and effective in solving the problem of optimization design of the antenna through the optimization design of planar PIFA antenna and printed monopole antenna, which has a good reference value for the optimization design of the antenna.