volume | PIER Journals

Abstract

In this article, designs and analyses of several CCPW (Cylindrical CPW) discontinuities have been realized as microwave reactive elements. The quasi-TEM characteristic parameters of CCPWs have been obtained by CMT (Conformal Mapping Techniques) which provide satisfactory accuracy at microwave frequencies and lead to closed-form analytical solutions suitable for CAD software packages. Then these discontinuities have been simulated in CST Microwave Studio 2006 in order to obtain inductance, capacitance and also input impedance versus frequency and physical dimensions of the elements. The results show that CCPW discontinuities can be used successfully as reactive elements for related applications.

1. Dib, N. and A. Omar, "Dispersion analysis of multilayer cylindrical tranmission lines containing magnetized ferrite substrates," IEEE Trans. Microwave Tech., Vol. 50, No. 7, 1730-1736, July 2002.
doi:10.1109/TMTT.2002.800423 Google Scholar

2. Duyar, M., V. Akan, E. Yazgan, and M. Bayrak, "Analyses of elliptical coplanar coupled waveguides and coplanar coupled waveguides with finite ground width," IEEE Trans. Microwave Tech., Vol. 54, No. 4, 1388-1395, June 2006.
doi:10.1109/TMTT.2006.871354 Google Scholar

3. Akan, V. and E. Yazgan, "Quasistatic TEM characteristics of multilayer elliptical and cylindrical coplanar waveguides," Microwave Opt. Tech. Lett., Vol. 42, No. 4, 317-322, Aug. 2004.
doi:10.1002/mop.20290 Google Scholar

4. Yazgan, E. and V. Akan, "Conformal mapping techniques," Encyclopedia of RF and Microwave Engineering, Vol. 1, John Wiley & Sons, 2005. Google Scholar

5. Karpuz, C., M. Duyar, and A. Gorur, "Analysis of cylindrical conductor-backed coplanar waveguides," Microwave Opt. Tech. Lett., Vol. 27, No. 2, 144-146, Oct. 2000.
doi:10.1002/1098-2760(20001020)27:2<144::AID-MOP19>3.0.CO;2-G Google Scholar

6. Al-Zoubi, A. and N. Dib, "CAD model of gap in cylindrical coplanar waveguide," Electronics Letters, Vol. 35, No. 25, 1857-1858, Oct. 1999. Google Scholar

7. Beilenhoff, K., H. Klingbeil, W. Heinrich, and H. L. Hartnagel, "Open and short circuits in coplanar MMIC's," IEEE Trans. Microwave Tech., Vol. 41, No. 9, 1534-1537, Sep. 1993.
doi:10.1109/22.245673 Google Scholar

8. Simons, R. N. and G. E. Ponchak, "Modeling of some coplanar waveguide discontinuities," IEEE Trans. Microwave Tech., Vol. 36, No. 12, Dec. 1998. Google Scholar

9. Su, H.-C. and K.-L. Wong, "Quasistatic solutions of cylindrical coplanar waveguides," Microwave and Optical Technology Lett., Vol. 14, No. 16, 347-351, 1997.
doi:10.1002/(SICI)1098-2760(19970420)14:6<347::AID-MOP12>3.0.CO;2-0 Google Scholar

Dr. Volkan Akan

Dr. Mehmet Duyar

Prof. Erdem Yazgan

Dr. Mehmet Bayrak