volume | PIER Journals

Abstract

A microstrip 180^o phase shifter obtained by a novel design of Microstrip-to-Coplanar Waveguide (CPW)-to-Microstrip transition is presented. The proposed phase shifter is obtained without changing the layer of the second microstrip line. Via holes are used to transfer the current from the top to the bottom substrate layer and vice versa. The presented phase shifter is operating in a wide bandwidth between 5.5 and 18 GHz, with low insertion loss and reflection coefficients. Because the input and output microstrip lines are on the same layer, the presented phase shifter is suitable for a modified class of feeding networks for phased antenna arrays.

1. Maloratsky, L. G., "Reviewing the basics of microstrip lines," Microwave & RF, 79-88, March 2000.

2. Mailloux, R. J., Phased Array Handbook, Artech House, Boston, 1994.

3. Eldek, A. A., "Design of double dipole antenna with enhanced usable bandwidth for wideband phased array applications," Progress In Electromagnetics Research, Vol. 59, 1-15, 2006.
doi:10.2528/PIER06012001

4. Eldek, A. A., "Ultra wideband double rhombus antenna with stable radiation patterns for phased array applications," IEEE Trans. Antennas Propagat., Vol. 55, No. 1, 84-91, Jan. 2007.
doi:10.1109/TAP.2006.886560

5. Kim, S., S. Jeong, Y. T. Lee, D. H. Kim, J. S. Lim, K. S. Se, and S. Nam, "Ultra-wideband (from DC to 110 GHz) CPW to CPS transition," Electronic Lett., Vol. 38, No. 13, 622-623, Jun. 2002.
doi:10.1049/el:20020423

6. Tilley, K., X. D. Wu, and K. Chang, "Wideband transition from conductor-backed coplanar waveguide to modified coplanar stripline using multiple substrates," Electronic Lett., Vol. 29, No. 23, 2051-2052, Nov. 1993.
doi:10.1049/el:19931370

7. Ho, C. H., L. Fan, and K. Chang, "Broad-band uniplanar hybridring and branch-line couplers," IEEE Trans. Microwave Theory and Techniques, Vol. 41, No. 12, 2116-2125, Dec. 1993.
doi:10.1109/22.260719

8. Prieto, D., J. C. Cayrou, J. L. Cazaux, T. Parra, and J. Graffeul, "CPS structure potentialities for MMICs: a CPS/CPW transition and a bias network," IEEE MTT-S International Microwave Symposium Digest 1998, Baltimore, MD, Vol. 1, 111-114, Jun. 1998.

9. Mao, S. G., C. T. Hwang, R. B. Wu, and C. H. Chen, "Analysis of coplanar waveguide-to-coplanar stripline transitions," IEEE Trans. Microwave Theory and Techniques, Vol. 48, No. 1, 23-29, Jan. 2000.
doi:10.1109/22.817468

10. Suh, Y.-H. and K. Chang, "A wideband coplanar stripline to microstrip transition," IEEE Microwave and Wireless Components Lett., Vol. 11, No. 1, 28-29, Jan. 2001.
doi:10.1109/7260.905958

11. Safwat, A. M. E., K. A. Zaki, W. Johnson, and C. H. Lee, "Novel transition between different configurations of planar transmission lines," IEEE Microwave and Wireless Components Letters, Vol. 12, No. 4, 128-131, Apr. 2002.
doi:10.1109/7260.993290

12. Zheng, G., J. Papapolymerou, and M. M. Tentzeris, "Wideband coplanar waveguide RF probe pad to microstrip transitions without via holes," IEEE Microwave and Wireless Components Letters, Vol. 13, No. 12, 544-546, Dec. 2003.
doi:10.1109/LMWC.2003.820638

13. Maya, M. C., A. Lazaro, P. DePaco, and L. Pradell, "A method for characterizing coplanar waveguide-to-microstrip transitions, and its of microstrip devices with coplanar microprobes," Microwave Optical Tech. Lett., Vol. 39, No. 5, 373-378, Dec. 2003.
doi:10.1002/mop.11222

14. Reiche, E. and F. H. Uhlmann, "Application of the FDTD for the optimization of broad-band transitions between different types of transmission lines," IEEE Trans. on Magnetics, Vol. 38, No. 2, 593-596, Mar. 2002.
doi:10.1109/20.996155

15. Oldenburg, M. K. and T. M. Weller, "High-efficency CPW-to-slotline transitions on low εr substrates," Microwave Optical Tech. Lett., Vol. 41, No. 2, 91-93, Apr. 2004.
doi:10.1002/mop.20057

16. Abbosh, A. M. and M. E. Bialkowski, "An UWB planar out-of-phase power divider employing parallel stripline-microstrip transitions," Microwave Optical Tech. Lett., Vol. 49, No. 4, 912-914, Apr. 2007.
doi:10.1002/mop.22324

17. Mousavi, P., R. R. Mansour, and M. Daneshmand, "A novel wide band 180-degree phase shift transition on multilayer substrates," IEEE MTT-S International Microwave Symposium Digest 2004, 1887-1890, Jun. 2004.

18. HFSS: High Frequency Structure Simulator Based on the Finite Element Method,v er. 10,Ansoft Corp., 2005.

Dr. Abdelnasser Eldek