2024-03-28T15:48:59Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/461012022-11-17T02:08:08Zhdl_2115_20053hdl_2115_145Evolutional Design of Small Antennas for Passive UHF-Band RFIDMakimura, HidetoshiWatanabe, YutaWatanabe, KotaIgarashi, HajimeEvolutional designGenetic algorithmsMoment methodsWire antennas548This paper presents evolutional design of antennas for passive IC tags used at UHF-band. The shape of wire antennas is optimized using the genetic algorithm (GA) aiming at maximization of feeding power to the IC tag to lengthen the communication distance as well as minimization of the antenna size. The characteristics of the antennas printed on a dielectric substrate are evaluated using the moment method in the optimization processes. Genotypes for GA are introduced to express the shapes of lattice antennas which include loops and floating lines, and spiral antennas. It is shown that optimized antennas satisfy the required condition, and have smaller sizes in comparison with conventional meander antennas.IEEE : Institute of Electrical and Electronics EngineersJournal Articleapplication/pdfhttp://hdl.handle.net/2115/46101https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/46101/1/IEEE_TM47_1510-1513.pdf0018-94641941-0069AA00667933IEEE Transactions on Magnetics475151015132011-05enginfo:doi/10.1109/TMAG.2010.2089607© 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.author