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has been cited by the following article:

• TITLE: Hemispherical DRA Antennas Mounted on or Embedded in Circular Cylindrical Surface forProducing Omnidirectional Radiation Pattern

  AUTHORS: Saber H. Zainud-Deen, Noha A. El-Shalaby, Kamal H. Awadalla

  KEYWORDS: DRAs, FEM, FIT

  JOURNAL NAME: International Journal of Communications, Network and System Sciences, Vol.4 No.9, September 20, 2011

  ABSTRACT: The radiation characteristics of hemispherical DRA elements mounted on or embedded in a hollow circular cylindrical ground structure are investigated. The performance of the DRA array which operates at about 1.8 Ghz, is studied. Factors influencing the array performance, such as the number of elements and element spacing are explained. The perforated dielectric technique is used to design the array from a single dielectric sheet. The overall profile of the antenna can be significantly reduced. The radiation patterns with respect to the number of DRA elements are depicted.