List of Articles HFSs

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Novel Circularly Polarized Substrate Integrated Waveguide SLOT Antanna
  Omid Khodadad Pejman Mohammadi
  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - ELECTRE I-based group decision methodology with risk preferences in an imprecise setting for flexible manufacturing systems
  Seyed Meysam Mousavi Hosein Gitinavard Behnam Vahdani
  10.22094/joie.2019.662.1428
  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Longitudinal Shunt Slot Excitation by Wiggly Ridge Substrate Integrated Waveguide
  Mehdi Salemi Mehdi Moradian Reza Safian
  Application of a substrate integrated waveguide with wiggly ridge shape is presented for excitation longitudinal shunt slot antenna. Two main design equations for design substrate integrated waveguide structure and get parameters of structures, for longitudinal shunt sl More

  Application of a substrate integrated waveguide with wiggly ridge shape is presented for excitation longitudinal shunt slot antenna. Two main design equations for design substrate integrated waveguide structure and get parameters of structures, for longitudinal shunt slot excitation by shape wiggly ridge in  substrate integrated waveguide are modified. Proposed method is used by applied the crinkle shape to ridge for ridge substrate integrated waveguide structure. This shape wiggly ridge just under longitudinal slot. The slot is place at centreline of substrate integrated waveguide (siw) in center of waveguide and on dielectric copper surface, top of  substrate integrated waveguide. Amount of crinkle depth of waveguide centreline is proportional with needful radiation of slot and normalized conductance could be much to increase crinkle depth. In this paper the shunt element distribution assumption for prposed structure is spoted. Results of simulation show, proposed method is suitable candidate for replacing with usual longitudinal shunt slot. Structure’s useful is, low fabrication price, small profile and adaptation with microstrip circuit. Also slot place along waveguide centerline and wiggle depth substitute slot offset, therefore this procedure can suppress second order bim in array containing suggestion structure.  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Unequal Wilkinson Power Divider Using Asymmetric Microstrip Parallel Coupled Lines
  Mehdi Moradian Saeed Nasri Majid Tayarani
  An effective method is introduced to overcome the narrow strip width in unequal Wilkinson power divider with high dividing ratio. In the proposed Wilkinson power divider, the separated microstrip lines are replaced by a uniform asymmetrical microstrip coupled lines. To More

  An effective method is introduced to overcome the narrow strip width in unequal Wilkinson power divider with high dividing ratio. In the proposed Wilkinson power divider, the separated microstrip lines are replaced by a uniform asymmetrical microstrip coupled lines. To design the power divider, a suitable error function is defined and then minimized which led to the final dimensions of the proposed unequal Wilkinson power divider. A sample of the proposed power divider with 4:1 dividing ration is designed and simulated, which indicate the effectiveness of the proposed power divider and its design method. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  5 - Centerline Longitudinal Shunt Slot Excitation by Elliptic shaped single Ridge Waveguide
  Mehdi Moradian Mohammad Khalaj-Amirhosseini Majid Tayarani
  The Application of elliptic shaped ridge waveguide is presented for excitation of a centreline longitudinal shunt slot antenna. The proposed method is realized by adding elliptic shaped to the ridge of the single ridge waveguide. The elliptic shaped ridge is placed exac More

  The Application of elliptic shaped ridge waveguide is presented for excitation of a centreline longitudinal shunt slot antenna. The proposed method is realized by adding elliptic shaped to the ridge of the single ridge waveguide. The elliptic shaped ridge is placed exactly under the longitudinal slot and the slot placed along centreline of the waveguide. It is shown that for a typical slot, the slot normalized conductance can be increased by increasing the elliptic shaped depth. The simulation results show that the proposed structure can be considered as a proper candidate for replacing the conventional longitudinal shunt slot. Manuscript profile