Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Subject: search.filters.subject.Microwave

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Optimization of Parameters Influencing Tensile Strength of Inconel-625 Welded Joints Developed Through Microwave Hybrid Heating
    (Elsevier Ltd, 2018) Badiger, R.I.; Narendranath, S.; Srinath, M.S.
    Processing of bulk metals through microwave energy in recent years is finding widespread applications and is being prominently accepted by the manufacturing industries. Present work, investigates the effect of process parameters on the tensile strength of Inconel-625welded joints produced through microwave hybrid heating using design of experiments. Experiments were carried out by using Taguchi's L16 factorial design of experiment method. Input parameters chosen were separator type; susceptor type and filler powder size. The output response chosen was ultimate tensile strength. Optimization of the process parameters is done through Taguchi method and percentage influence of each process parameter on the strength of weld is determined using ANOVA method. Combination of parameters with graphite separator, SiCsusceptor and finer filler powder yields optimum result. © 2017 Elsevier Ltd.
  • No Thumbnail Available
    Item
    Dual-Band Antipodal Vivaldi Antenna for Wireless Neural Monitoring Applications
    (Institute of Electrical and Electronics Engineers Inc., 2020) Gopavajhula, S.; Kumar, S.; Narasimhadhan, A.V.
    This paper proposes a dual-band Antipodal Vivaldi antenna for wireless neural monitoring system. Most of the work in the literature uses active implant systems operating in single frequency band of operation. The proposed antenna utilizes a passive Antipodal Vivaldi shaped structure that achieves a dual band of operation. The proposed wireless neural monitoring system employs a microwave back-scattering method and eliminates the need for additional power sources. The Antipodal shaped antenna with optimized design provides two different bands with transmission at 4.4 GHz and reception at 2.2 GHz. Measured and simulated return loss results of the antenna shows a good agreement with each other. In addition, proposed antenna achieves the gains of 3.05 dB and 1.39 dB at dual-band while radiation pattern of the antenna is found more directive by achieving a 16 dB difference between co-polarization and cross-polarization. © 2020 IEEE.
  • No Thumbnail Available
    Item
    Effect of input power and interfacial powder size on microwave joining of different materials: A review
    (Elsevier Ltd, 2021) Kamble, D.L.; Sahu, R.; Narendranath, S.; Badiger, R.I.
    The use of microwave energy for processing of different materials is gaining significant attention in today's manufacturing industries. The microwave energy found to be applied in sintering, cladding, brazing, joining, casting and drilling of variety of materials. This paper is focused on the detailed review of the research works carried out on the effect of input power of microwave source and interfacial powder size on joint characteristics of different materials. It has been reported that majority of the isotropic to orthotropic materials can be joined using microwave heating source. The characteristics of the joints produced through microwave energy were studied by various researchers using mechano-metallurgical characterization techniques like tensile and hardness tests technique, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The characterization results found in different works are presented in the paper. © 2021 Elsevier Ltd. All rights reserved.