4.6 Article

Accurate Design of Microwave Filter Based on Surrogate Model-Assisted Evolutionary Algorithm

Journal

ELECTRONICS
Volume 11, Issue 22, Pages -

Publisher

MDPI
DOI: 10.3390/electronics11223705

Keywords

microwave filter design; one-dimensional convolutional autoencoders; online updating; particle swarm optimization; surrogate model

Funding

  1. National Natural Science Foundation of China (NSFC) [61761032, 62161032]
  2. Nature science foundation of Inner Mongolia [2019MS06006]
  3. Inner Mongolia Foundation [2020MS05059]
  4. Inner Mongolia Department of Transportation [NJ-2017-8]
  5. Shaanxi Key Laboratory of Deep Space Exploration Intelligent Information Technology [2021SYS-04]
  6. Research and Development of New Energy Vehicle Product Testing Conditions in China-Hohhot Baotou, 2017

Ask authors/readers for more resources

This paper proposes an adaptive online updating 1D convolutional autoencoders (AOU-1D-CAE) surrogate model for filter optimization problems, which involve time-consuming simulations and many variables in the design. The experimental results demonstrate that the proposed surrogate model improves data collection efficiency and prediction performance. Furthermore, the surrogate model assists particle swarm optimization (PSO) in finding the global optimal solution, leading to enhanced optimization efficiency.
Filter optimization problems involve time-consuming simulations and many variables in the design. These problems require a large amount of computation. This paper proposes an adaptive online updating 1D convolutional autoencoders (AOU-1D-CAE) surrogate model for solving this computationally expensive problem. In the optimization process, an adaptive update surrogate mapping between input variables and output objectives is constructed within the surrogate model AOU-1D-CAE framework. AOU-1D-CAE can replace electromagnetic (EM) simulation software for data collection, and select and automatically use the accumulated data as training samples to train the AOU-1D-CAE surrogate model. With more and more training samples, the learning ability of the surrogate model is also becoming stronger and stronger. The experimental results show that the data collection efficiency of AOU-1D-CAE is greatly improved, and the automatic update of the sample set improves the prediction performance of the surrogate model. In this paper, the optimization framework is AOU-1D-CAE-assisted particle swarm optimization (PSO), and the surrogate model assists PSO to find the global optimal solution. In the PSO stage, PSO automatically updates and saves the optimal solution, and takes the optimal solution of each stage as the initial solution of the next optimization stage to avoid falling into the local optimal solution. The optimization time is greatly saved and the optimization efficiency is improved. The continuous iteration of PSO also improves the prediction accuracy of the surrogate model. The efficiency of the proposed surrogate model is demonstrated by using two cavity filters as examples.

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