• Narad Prasad
• Surya Kumar Pandey

In this paper, Analysis and characteristic of the microstripline coupler and their variation parameters with different substrates. The characteristics parameters have been studied for which different models have been developed by different investigators. Characteristics impedance, propagation constant, guide wavelength and phase velocity are important characteristics parameters for single stripline and the corresponding parameters for the coupled microstriplines are designated in case of even and odd-modes of wave propagations. Respective tables and graphs shows the dependence of characteristic impedance, phase velocity and guide wavelength on stripwidth of the metal, on spacing between two metal strips, on dielectric constant of the substrate material for both the even and odd-modes. Mathematical formulation method is used which is based on the conformal transformation technique developed by H.A. Wheeler and calculation is based on computer programming developed by S.K. Kaul using closed form formula of Schwartzman.

Microstripline, Coupler, Substrate, Even & Odd-modes, phase velocity and Conformal Transformation.

"ANALYSIS AND CHARACTERISTICS OF MICROSTRIPLINE COUPLER AND THEIR VARIATION PARAMETERS WITH DIFFERENT SUBSTRATES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 11, page no.168-174, November-2018, Available :http://www.jetir.org/papers/JETIR1811420.pdf

"ANALYSIS AND CHARACTERISTICS OF MICROSTRIPLINE COUPLER AND THEIR VARIATION PARAMETERS WITH DIFFERENT SUBSTRATES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 11, page no. pp168-174, November-2018, Available at : http://www.jetir.org/papers/JETIR1811420.pdf