The purpose of this paper is to present an optimization process for the design of a 2×2 patch antenna phased array with application for an UHF RFID system.
The optimization process is based on a method of moment (MoM)-solver, which was individually made to create such patch antenna phased arrays and simulate the radiated field pattern. In combination with this MoM-solver, a GUI, which gives the opportunity to change every physical antenna factor and create the antenna structure within a few minutes is presented. Furthermore the golden section search method is used to produce an even better solution in a more efficient way compared to the first attempt. After the simulation, different types of presentation of results can be chosen for a fast and easy optimization.
The design process is discussed while the authors try to optimize the distance between the elements and the difference of input phase for each patch element. The final goal is to create an antenna with maximum directivity and coverage of field pattern.
A physical implementation of an optimized patch antenna phased array and the results of measurement are presented in the end.
An optimization process for the design of a 2×2 patch antenna phased array with application for an UHF RFID system is presented. Furthermore the golden section search method is combined with the design process to increase the accuracy of the solution and decrease the time effort.
The reported R+D work was carried out in the frame of the BMBF-Project smaRTI (Smart ReUsable Transport Items); the smaRTI project is carried out in the frame of the Efficiency Cluster Logistic Ruhr (part of the Leading-Edge Cluster – High-Tech Strategy for Germany). This particular research was supported by the BMBF (Bundesministerium fuer Bildung und Forschung) of Federal Republic of Germany under Grant 01IC10L10H (Save, flexible detection and localization of UHF-RFID-labels in rough environment). The responsibility for this publication is held by the authors only. In particular the authors thank the R+D Coordinator of smaRTI Application Scenario POST Dr W. John (SIL GmbH (iG)) for his ongoing support regarding the RFID challenges of the postal logistic chain and the related industrial R+D requirements. The authors would also like to thank the reviewers for their comments that helped improve the paper.
Wang, Y., Berens, M., Nietsch, A., John, W. and Mathis, W. (2014), "Optimized designing of a patch phased array with a MoM-solver", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 33 No. 6, pp. 1847-1862. https://doi.org/10.1108/COMPEL-11-2013-0365
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