Analysis and design of connected slot arrays with artificial dielectrics

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Abstract

Connected arrays of slots loaded with artificial dielectric layers have been proposed to realize wideband phased arrays with large scan capability. The role of the artificial dielectric superstrate is to provide a wide angle impedance matching transformation from the impedance at the feeding port of the unit cell to the free space impedance. This wideband transformer also reduces the negative effects of the ground plane on the impedance matching. Unlike dielectric superstrates, artificial dielectrics can avoid the propagation of surface waves and the occurrence of scan blindness over very wide scan volumes and large frequency ranges. The analytical method used for the modeling of the unit cell is described. The analysis is based on closed-form expressions for both the connected array and the artificial dielectric, thus it can be used to simulate the main array parameters with minimal computation resources. The method is then used to design a 5:1 connected array with scanning capability up to 60 degrees in all azimuthal directions.
Original languageEnglish
Title of host publication2019 IEEE International Symposium on Phased Array System & Technology (PAST)
PublisherIEEE
Number of pages5
ISBN (Electronic)978-1-7281-3049-1
ISBN (Print)978-1-7281-3050-7
DOIs
Publication statusPublished - 2019
Event PAST 2019 IEEE International Symposium on Phased Array System and Technology - Waltham, United States
Duration: 15 Oct 201918 Oct 2019

Conference

Conference PAST 2019 IEEE International Symposium on Phased Array System and Technology
Abbreviated titlePAST 2019
CountryUnited States
CityWaltham
Period15/10/1918/10/19

Keywords

  • artificial dielectrics
  • connected slot array
  • phased arrays
  • wideband arrays
  • wide scanning

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