An efficient method for complex antenna design based on a self adaptive surrogate model assisted optimization technique

Liu, B. , Akinsolu, M. O., Song, C., Hua, Q., Huang, Y., Excell, P., Imran, M. and Xu, Q. (2021) An efficient method for complex antenna design based on a self adaptive surrogate model assisted optimization technique. IEEE Transactions on Antennas and Propagation, 69(4), pp. 2302-2315. (doi: 10.1109/TAP.2021.3051034)

Abstract

Surrogate models are widely used in antenna design for optimization efficiency improvement. Currently, the targeted antennas often have a small number of design variables and specifications, and the surrogate model training time is short. However, modern antennas become increasingly complex which need much more design variables and specifications, making the training time become a new bottleneck, i.e., in some cases even longer than electromagnetic (EM) simulation time. Therefore, a new method, called training cost reduced surrogate model-assisted hybrid differential evolution for complex antenna optimization (TR-SADEA) is presented in this paper. The key innovations include: (1) A self-adaptive Gaussian Process surrogate modeling method with a significantly reduced training time whilst mostly maintaining the antenna performance prediction accuracy, and (2) A new hybrid surrogate model-assisted antenna optimization framework which reduces the training time and increases the convergence speed. An indoor base station antenna with 2G to 5G cellular bands (45 design variables, 12 specifications) and a 5G outdoor base station antenna (23 design variables, 18 specifications) are used to demonstrate TR-SADEA. Experimental results show that more than 90% of the training time and about 20% iterations (simulations and surrogate modeling) are reduced compared to a state-of-the-art method while obtaining high antenna performance.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Imran, Professor Muhammad and Liu, Dr Bo
• Authors: Liu, B., Akinsolu, M. O., Song, C., Hua, Q., Huang, Y., Excell, P., Imran, M., and Xu, Q.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: IEEE Transactions on Antennas and Propagation
• Publisher: IEEE
• ISSN: 0018-926X
• ISSN (Online): 1558-2221
• Published Online: 18 January 2021
• Copyright Holders: Copyright © 2020 Crown Copyright
• First Published: First published in IEEE Transactions on Antennas and Propagation 69(4): 2302-2315
• Publisher Policy: Reproduced in accordance with the publisher copyright policy