Design and Performance of a Multistrip Coupler

Document Type : Original Article

Authors

* Dept. of Communication and Electronic, Shoubra Faculty of Engineering, Benha University, Egypt

Abstract

In this paper, an algorithm suitable for the computer aided design (CAD) has been developed, to give us a table of calculated data which can be used as a design tool for optimum multistrip-coupler. Design criteria for multistrip components are discussed in terms of substrate and bandwidth requirements. In other words, the effects of substrate types and center frequency on the performance of multi-strip coupler in the presence of material, limitations are demonstrated. The obtained results show that, different substrates will enable us to use relatively small size strips which leads to miniaturization the design as well as extends the usefulness of the strip lines to higher frequency

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[1] F. G. Marshall and E. G. S. Paige, "Novel acoustic-surface-wave directional coupler with diverse applications", Electron Lett.vol.7, Aug. 1971, pp. 460. [2] F.Graham Marshall, Edward G.S.Paige, "Theory and design of the surface acoustic wave multistrip coupler", IEEE transactions on sonics ultrasonics, Vol. SU-20, NO.2, APRIL 1973, pp 127-128. [3] Alexander S. Rukhlenko, Dr., "SAW Filter Analysis in the Quasi-static Approximation: Theory and Algorithms", May 2000, PP. 5-1, 5-2. [4] Chang Bao Wen, Yong Feng Ju, Li Liu, Ya Fei Jiang, Chen Zhao, Li Min Wen, Yan Ming Li, "Study on Design and Experiment of SAW Device Based on MSC", Applied Mechanics and Materials, Vol. 135-136, Oct. 2011, pp.954. [5] Changbao Wen, Changchun Zhu, Yong Feng Jn, YanZhang Qi, HongKe Xu, WenKe Lu, Xiaodong Hu, YuanWu, Junhua Liu, "Dual track architecture and time synchronous scheme for wavelet reconstruction processor using SAW device based on MSC", Sensors and Actuators A: Physical, Vol. 147, 2008, pp.222 [6] Changbao Wen, Changchun Zhu, Yongfeng, Hongke Xu,Yanzhang Qiu," A novel NO2 gas sensor using dual track SAW device", Sensors and Actuators A: Physical, Vol. 159, May 2010, pp.168. [7] V. F. Dmitriev, "Theory and Application of a Multistrip Surface-Acoustic- Wave Coupler with an Aperiodic Electrode Structure", Journal of communications Technology and Electronics, Vol.53, No.3, 2008, pp.336. [8] R. Dobson, "an introduction to the design of surface acoustic wave devices ", department of defence , defence scince and technology organization, pp. 42-43. [9] Bill J. Hunsiger, "surface acoustic wave device having improved multistrip coupler ", U.S patent documents, Nov. 22, 1983. [10] J.D. Maines, E.G.S.Paige, "surface-acoustic-wave components, devices and applications ", PROC.lEE, vol. 120, Oct.1973, PP 1084. [11] F.Graham Marshall, Edward G.S.Paige, "Surface Acoustic Wave Multistrip Components and Their Applications", IEEE transactions on sonics ultrasonics, Vol. SU-20, NO.2, APRIL 1973.