N. Herscovici

Publications (4)0 Total impact

• Conference Proceeding: Dyadic Green's function for an electric current source in the unit cell of a periodic structure

  B. Tomasic, H. Steyskal, N. Herscovici
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  ABSTRACT: In this paper the dyadic Green's function and expressions for the fields due to an electric current source in a Floquet phase-shift-wall waveguide (unit cell) are derived. The expressions are valid in the entire unit cell region including the source. Numerical results for the scattering from a conducting strip in a unit cell using these expressions are in a good agreement with numerical results obtained by the HFSS code. The dyadic Green's function can be used in future analyses of phased arrays and metamaterials.
  Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE; 08/2010
• Conference Proceeding: Analysis of cylindrical array of infinitely-long slots fed by connected dipoles

  B. Tomasic, N. Herscovici
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  ABSTRACT: We have developed an accurate analysis of a cylindrical array structure of long slots with connected dipole feeds. The array exhibits wide-band characteristics, about 3:1 frequency band at broadside scan. The code we generated could be used to accurately predict the impedance and radiation characteristics of the array.
  Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE; 07/2009
• Conference Proceeding: A wide-band single-layer aperture-coupled microstrip antenna

  N. Herscovici, B. Tomasic, J. Ginn, T. Donisi
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  ABSTRACT: In this paper a new type of a wideband aperture-coupled microstrip antenna is presented. The antenna is modelled as a 2.5 D structure, and is optimized using a genetic algorithm (GA). In addition to the radiator shape, the feed and the coupling slot dimensions are also included in the optimization process. The impedance bandwidth corresponding to VSWR<2:1 achieved by this optimization for the microstrip fed case is slightly larger than 38% and slightly above 20% for the stripline fed case. In order to achieve this bandwidth with traditional aperture-coupled patch, a multilayer patch structure is required. The concept proposed here, considerably reduces the complexity of the fabrication process.
  Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on; 04/2009
• Conference Proceeding: Analysis of periodic array of infinitely-long slots fed by connected dipoles

  B. Tomasic, N. Herscovici, H. Steyskal
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  ABSTRACT: We have presented an accurate analysis for the array structure of long slots with dipole feeds as described in Lee et al. (2006). The array exhibits wide-band characteristics, about 3:1 frequency band, with the above specified geometrical parameters. The code we generated could be used to optimize the performance of the element in an infinite array environment.
  Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE; 08/2008