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- W2274178791 abstract "Multiport antennas offer greater design flexibilitythan traditional one-port designs. An antenna array is a specialcase of a multiport antenna. If the antenna's inter-element spacingis electrically small, the antenna is capable of achievingsuperdirectivity. Superdirective antenna arrays are known to benarrow band and have low radiation resistance which leads to lowradiation efficiency and high VSWR. However, by increasing theself-impedance of the antenna elements, the radiation resistance isincreased but the bandwidth remains narrow. A design methodology isdeveloped using the ability to superimpose electric fields andmulti-objective optimization to design antenna feed networks. Whilethe emphasis in this dissertation is on antenna arrays andsuperdirectivity, the design methodology is general and can beapplied to other multiport antennas. The design methodology is usedto design a multiport impedance-matching network and optimize boththe input impedance and radiation pattern of a two-portsuperdirective antenna array. It is shown that the multiportimpedance-matching network is capable of improving the inputimpedance of the antenna array while maintaining highdirectionality. The antenna design is critical for the methodologyto improve the bandwidth and radiation characteristics of thearray. To double the bandwidth of the two-port impedance matchedsuperdirective antenna array, a three-port Yagi-Uda antenna designis demonstrated. The addition of the extra antenna element does notincrease the footprint of the antenna array. The design methodologyis then used to design a symmetrical antenna array capable ofsteering its main beam in two directions." @default.
- W2274178791 created "2016-06-24" @default.
- W2274178791 creator A5059377794 @default.
- W2274178791 date "2012-01-01" @default.
- W2274178791 modified "2023-09-27" @default.
- W2274178791 title "Design methodology for multiport antennas" @default.
- W2274178791 hasPublicationYear "2012" @default.
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