Department of Electrical and Electronics Engineering

Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1925

Browse

Filters

2016 - 20204

Settings

Subject: search.filters.subject.Dispersion Diagram

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Miniaturized Slot-loaded Mushroom EBG Cell for MBAN and Wi-Fi Bands
    (IEEE, 2020) Rano, Dinesh
    Systematic design approach for two new types of EBG cells operating in the Medical Body Area Network (MBAN) and ISM bands are reported. The proposed EBG cells make use of the conventional mushroom and slot loaded EBG cells. The proposed techniques utilize tuning of slot dimensions to achieve miniaturization. A reduction of more than 20% is obtained using the presented designs when compared to the mushroom cell. Furthermore, an algorithm that combines the LC lumped circuit model and dispersion diagram of the EBG cells to expedite the design and analysis is developed. To experimentally validate the design feasibility and hence the bandgap property of the proposed cells, an array of 3x5 unit cells is prototyped. The measured results show good agreement with the simulated results at the desired band.
  • No Thumbnail Available
    Item
    A New Lumped Circuit Modelling Technique for EBG Based on Surface Current Flow
    (IEEE, 2018) Rano, Dinesh
    LC- lumped circuit model dependent on surface current flow along the strips of via based electromagnetic band gap (EBG) structures has been investigated in this paper. The propagating surface waves bounded between the metallic layer and free space are simply ac currents at high frequency which find least resistive path to the ground. This property has been exploited in this work to develop fast and accurate lumped model to determine resonant frequency. The accuracy of the model has been verified by transmission parameter in conjunction with the reflection phase diagram of the EBG structures. The validation has been carried out by comparing the resonant frequency of the earlier reported EBGs.
  • No Thumbnail Available
    Item
    A New Miniaturized Slot-loaded EBG Cell for Cancelling Surface Waves in PCBs
    (IEEE, 2018) Rano, Dinesh
    Systematic design approach for a new electromagnetic band gap (EBG) cell, operating in MBAN and Wi-Fi band, to suppress surface wave propagation through printed circuit boards (PCB) is reported. A novel technique of tuning the slot width has been adopted to miniaturize the EBG cell in conjunction with LC lumped circuit model to expedite the design and analysis. Size and frequency miniaturization up to 30% and 33% respectively can be obtained using the presented design. The presented investigation also emphasizes on the utilization of the proposed EBG cells to suppress surface waves and electromagnetic interference (EMI) in PCB circuit. To quantify the surface wave suppression, transmission parameter of -20dB between two ends of the PCB has been achieved.
  • No Thumbnail Available
    Item
    Comparative analysis of performance improvement of MPA by using EBG and DGS structures
    (IEEE, 2016) Rano, Dinesh
    This paper present different design methods to improve the performance of MPA. A comparative analysis of EBG and DGS structures in terms of performance has been given. The proposed DGS structure improves gain, efficiency and the return loss of the antenna. The antenna w/o EBG and DGS resonates at 2.4 GHz offering bandwidth of 67.8 MHz. Three different types of DGS structure have been designed and their effects on the antenna performance have been tabulated. The DGS structure provides good matching with reduction in size more than 4%