New Ultra-Wideband Phase Shifter Design with Performance Improvement Using a Tapered Line Transmission Line for a Butler Matrix UWB Application
Keywords:
Compact size, multilayer technology, phase shifter, tapered line, ultrawidebandAbstract
A novel design of a compact UltraWideband (UWB) phase shifter with a new stub shape is presented in this paper. The proposed structure is formed using three layers of conductors interleaved with layers of substrates between each of the conductor’s layers. This multilayer technique was proposed to realize a design that is small in size, and a 23 mm × 50 mm compact phase shifter design was accomplished. In addition, the implementation of tapered transmission line techniques improved phase shifter performance, when compared with the conventional design without tapered transmission lines. A parametric study on the tapering of the transmission lines is presented and discussed. The measurement results of the phase shifter satisfactorily agreed with the simulation results. The phase shifters measured results demonstrated ± 5° phase deviation over the UWB frequency range. Moreover, the proposed phase shifter stubs successfully achieved 30% size reduction in comparison with the other available UWB phase shifter.
Downloads
References
S. K .A. Rahim, N. A. Muhammad, and T. A. Rahman, “Beamforming networks using reduced size and cascaded butler matrix,” In Proceedings of the Fourth European Conference on Antennas and Propagation (EuCAP), pp. 1-4, 2010.
S. K. A. Rahim, N. M Jizat, T. A. Rahman, T. K. Geok, and A. W Reza, “A novel design of butler matrix using optimized size of branch-line coupler,” Journal of Optoelextronics and Advanced Materials, vol. 12, no. 10, pp. 2031-2039, 2010.
L. Li, C. H. Liang, and C. H. Chan, “Waveguide end-slot phased array antenna integrated with electromagnetic band gap structures,” Journal of Electromagnetic Waves and Applications, vol. 21, no. 2, pp. 161-174, 2007.
B. Babajigit, A. Akdagli, and K. Guney, “A colonal selection algorithm for null synthesizing of linear antenna arrays by amplitude control,” Journal of Electromagnetic Waves and Applications, vol. 20, no. 8, pp. 1007-1020, 2006.
B. M. Schiffman, “A new class of broadband microwave 90-degree phase shifters,” IRE Transaction on Microwave Theory and Techniques, vol. 6, no. 2, pp. 232-237, 1958.
C. Free and C. Aitchison, “Improved analysis and design of coupled-line phase shifter,” IEEE Transaction Microwave Theory Technique, vol. 43, no. 9, pp. 2126-2131, 1995.
S. Y. Zheng, W. S. Chan, and K. F. Man, “Broadband parallel stubs phase shifter,” In Proceeding Asia-Pacific Microwave Conference, Singapore, pp. 1-4, 2009.
W. Yifan and M. E. Bialkowski, “UWB phase shifter with parallel stubs terminated with virtual short and ground slots,” In Proceedings of the 40th European Microwave Conference, Paris, France, pp. 1166-1169, 2010.
X. Tang, “Design of a UWB phase shifter using shunt λ/4 stubs,” In Microwave Symposium Digest, pp. 1021-1024, 2009.
A. M. Abbosh, “Ultra-wideband phase shifters,” IEEE Trans. Microwave Theory and Techniques, vol. 55, no. 9, pp. 1935-1941, 2007.
L. Pengcheng, J. Liang, and X. Chen, “Study of printed elliptical/circular slot antennas for ultrawideband applications,” IEEE Transactions on Antenna and Propagation, vol. 54, no. 6, pp. 1670- 1675, June 2006.
S. H. Choi, J. K. Park, S. K. Kim, and J. Y. Park, “A new ultra-wideband antenna for UWB applications,” Microwave and Optical Technology Letters, vol. 40, no. 5, pp. 399-401, 2004.
T. Tanaka, K. Tsunoda, and M. Aikawa, “Slotcoupled directional couplers between double-sided substrate microstrip lines and their applications,” IEEE Transaction Microwave Theory and Techniques, vol. 36, no. 12, pp. 1752-1757, 1988.
A. M. Abbosh and M. Bialkowski, “Design of compact directional couplers for UWB applications,” IEEE Trans. Microwave Theory and Techniques, vol. 55, no. 2, pp. 89, 2007.
D. N. A. Zaidel, S. K. A. Rahim, N. Seman, T. A. Rahman, and A. Abdulrahman, “Low cost and compact directional coupler for ultra-wideband applications,” Microwave and Optical Technology Letters, vol. 54, no. 3, pp. 670-674, 2012.
