Blake Chart Optimization of a VHF Phased Array Using Surrogate-Based Method

Liang Yu Ou Yang, Bingzhang Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper, an optimization methodology using surrogate-based method is proposed to optimize the Blake chart of a very high frequency (VHF) phased array. For transportable VHF radars with only a few antenna elements, the known beam-splitting effect can result in multiple nulls in the radiation pattern. This severely deteriorates the detection range curves in the Blake charts. A possible solution is to adjust the phase configuration of the phased array to search for the optimal Blake chart. Although the number of the phase configurations is huge, the surrogate-based optimization (SBO) adopted in this paper ensures the convergency, in contrast to the conventional simulated annealing (SA) and the typical genetic algorithm (GA). A uniform linear array (ULA) that consists of eight horizontally polarized dipole antennas is chosen for our simulation, and for such a case, the execution time of the simulation is within only 40 seconds using a common personal computer. The simulation results show that the detection range of the optimized Blake chart can be substantially increased.

Original languageEnglish
Title of host publication2021 IEEE Asia-Pacific Microwave Conference, APMC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages3
ISBN (Electronic)9781665437820
StatePublished - 2021
Event2021 IEEE Asia-Pacific Microwave Conference, APMC 2021 - Virtual, Online, Australia
Duration: 28 Nov 20211 Dec 2021

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


Conference2021 IEEE Asia-Pacific Microwave Conference, APMC 2021
CityVirtual, Online


  • Blake chart
  • Surrogate-based optimization
  • VHF phased array


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