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Fully Distributed Modeling, Analysis and Simulation of an Improved Non-Uniform Traveling Wave Structure | ||
| AUT Journal of Modeling and Simulation | ||
| مقاله 5، دوره 46، شماره 2، بهمن 2014، صفحه 47-52 اصل مقاله (407.94 K) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/miscj.2014.540 | ||
| نویسندگان | ||
| H. Khoshniyat؛ A. Abdipour* ؛ G. Moradi | ||
| Electrical Engineering Department, Amirkabir University of Technology,Tehran, Iran | ||
| چکیده | ||
| Modeling and simulation of communication circuits at high frequency are important challenges ahead in the design and construction of these circuits. Knowing the fact that the lumped element model is not valid at high frequency, distributed analysis is presented based on active and passive transmission lines theory. In this paper, a lossy transmission line model of traveling wave switch (TWSW) is presented and fully distributed analysis of this structure is also introduced. In the off state, the ordinary single pole single throw (SPST) switches operate as short or open circuit and return an observable part of the signal. To improve return loss in the off state, a non-uniform structure of SPST switches is proposed which is based on the artificial tapered transmission line produced by applying various controlling voltage at the gate. The analysis of ordinary and improved structure of SPST switches is performed and it is further compared with that of the semi-distributed and fully distributed methods. The results of simulation easily approve the improvement of matching in the off state. | ||
| کلیدواژهها | ||
| Fully-distributed model؛ single pole single throw switch (SPST)؛ traveling wave switch (TWSW)؛ non-uniform structure؛ lossy transmission line model | ||
| عنوان مقاله [English] | ||
| Fully Distributed Modeling, Analysis and Simulation of an Improved Non-Uniform Traveling Wave Structure | ||
| نویسندگان [English] | ||
| H. Khoshniyat؛ A. Abdipour؛ G. Moradi | ||
| Electrical Engineering Department, Amirkabir University of Technology,Tehran, Iran | ||
| چکیده [English] | ||
| Modeling and simulation of communication circuits at high frequency are important challenges ahead in the design and construction of these circuits. Knowing the fact that the lumped element model is not valid at high frequency, distributed analysis is presented based on active and passive transmission lines theory. In this paper, a lossy transmission line model of traveling wave switch (TWSW) is presented and fully distributed analysis of this structure is also introduced. In the off state, the ordinary single pole single throw (SPST) switches operate as short or open circuit and return an observable part of the signal. To improve return loss in the off state, a non-uniform structure of SPST switches is proposed which is based on the artificial tapered transmission line produced by applying various controlling voltage at the gate. The analysis of ordinary and improved structure of SPST switches is performed and it is further compared with that of the semi-distributed and fully distributed methods. The results of simulation easily approve the improvement of matching in the off state. | ||
| کلیدواژهها [English] | ||
| Fully-distributed model, single pole single throw switch (SPST), traveling wave switch (TWSW), non-uniform structure, lossy transmission line model | ||
| مراجع | ||
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[1] H. Mizutani, and Y. Takayama, ”DC-110-GHz MMIC traveling waveswitch," IEEE Trans. Microwave Theory Tech., vol. 48, No. 5, pp. 840-845, May, 2000. [2] H. Mizutani, N. Iwata, Y. Takayama, and K. Honjo, “Design Considerations for Traveling- Wave Single-Pole Multithrow MMIC Switch Using Fully Distributed FET," IEEE Trans. Microwave Theory Tech., vol. 55, No. 4, pp. 664-671, April 2007. [3] H. Khoshniyat, G. Moradi, A. Abdipour, and K. Afrooz, “Optimization and Fully Distributed Analysis of Traveling Wave Switches at Millimeter Wave Frequency Band," 1st MMWATT Conf., pp. 45-49, Dec, 2009. [4] G. L. Lan, D. L. Dunn, J. C. Chen, C. K. Pao, and D. C. Wang, “A high performance V-band monolithic FET transmit-receive switch," IEEE Microwave Millimeter-Wave Monolithic Circuits Symp. Dig., pp. 99-101, May, 1988. [5] H. Takasu, F. Sasaki, H. Kawasaki, H. Tokuda, and S. Kamihashi, “W-band SPST transistor switches," IEEE Microwave Guided Wave Lett.,vol. 6, pp. 315-316, Sept, 1996. [6] H. Mizutani, M. Funabashi, M. Kuzuharad, and Y.Takayama, “Compact DC-60 GHz HJFET MMIC switches using ohmic electrode- sharing technology," IEEE Trans. Microwave Theory Tech., vol. 46, pp. 1597-1603, Nov. 1998. [7] H. Khoshniyat, G. Moradi, A. Abdipour, K. Afrooz, "Optimization and Fully-Distributed Analysis of Single-Pole Single-Throw Traveling Wave Switches at Millimeter Wave Frequency Band,” International Journal of Information and Communication Technology (IJICT), vol.3, no.2, pp.19-25, March 2011. [8] H. Khoshniyat, G. Moradi, A. Abdipour, K. Afrooz, "Fully distributed analysis of an improved single pole single throw traveling wave switches,"21st Iranian Conference on Electrical Engineering (ICEE 2013), pp.1-4, May, 2013. | ||
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