The nextgeneration of microwave guiding elements was the strip-like or slot-like planar printed transmission lines used in MicrowaveIntegrated Circuits (MICs).These were planar low profile structures but lacked the high power carrying capacity and high Q-factor of the conventional waveguides. INTRODUCTION Conventional waveguides, the first generation of microwave guiding structures had the advantages of having highpower carrying capacity and high Q-factor, but also had the disadvantages of being bulky and voluminous. Thecomparison proves that at millimeter wave frequencies the choice of dielectric becomes crucial for a waveguide design andSIW is preferable to be used at these frequencies because the leakage losses decrease significantly.Keywords- waveguide SIW dielectric loss conduction loss leakage loss I. Different types oflosses in the waveguide and the optimized SIW are calculated theoretically and a comparison is done between the two. BIT, Mesra, Ranchi, Jharkhand, IndiaABSTRACT- In this paper equivalent Substrate Integrated Waveguide (SIW) for a waveguide is designed. 2013 pp-53-57 ISSN: 2249-6645 Losses in Waveguide and Substrate Integrated Waveguide (SIW) For Ku Band: A Comparison Sheelu Kumari, 1 Shweta Srivastava2 1 Department of Electronics & Communication Engg.CIT, Tatisilwai, Ranchi, Jharkhand, India 2 Department of Electronics & Communication Engg. International Journal of Modern Engineering Research (IJMER) Vol.3, Issue.1, Jan-Feb. Losses in Waveguide and Substrate Integrated Waveguide (SIW) For Ku Band: A Comparison
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