طراحی و شبیه‌سازی کوپلر روزنه‌ای موجبری باند X بر مبنای اَبَر رابطه ریاضی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده برق، دانشگاه کاشان

2 عضو هیئت علمی گروه مخابرات، دانشکده مهدسی برق، دانشگاه کاشان

چکیده

در این مقاله، به طراحی و شبیه­سازی کوپلرهای جهتی موجبری با سمتگرایی زیاد بر مبنای اَبَرشکل­ها پرداخته می­شود. به‌منظور دستیابی به سمتگرایی زیاد، روزنه­های دایروی موجود در کوپلرهای متداول به‌صورت معادل با روزنه­های اَبَرشکلی جایگزین می­شوند. دو نمونه کوپلر پیشنهادی طراحی­شده در محدوده فرکانسی 8 گیگاهرتز تا 12 گیگاهرتز دارای ضرایب کوپلینگ dB 1± 19 و dB 2± 23 و سمتگرایی بهتر از dB 20 می­باشند. نتایج شبیه­سازی نشان می­دهند که با این روش می­توان سمتگرایی کوپلر را نسبت به کوپلر روزنه­ای متداول تا حدود       dB 20 بهبود بخشید. نتایج به‌دست آمده در زمینه طراحی و توسعه کوپلرهای موجبری با سمتگرایی زیاد حائز اهمیت است.

کلیدواژه‌ها


عنوان مقاله [English]

Design and Simulation of X-Bnad Hole Waveguide Coupler Based on Superformula

نویسندگان [English]

  • Azam Tayebi 1
  • Davoud Zarifi 2
1 MSc Student, Department of Electrical Engineering, University of Kashan
2 Department of Electrical Engineering, University of Kashan, Kashan
چکیده [English]

Design and simulation of high directive waveguide directional couplers based on supershapes are presented, in the present paper. In order to obtain high directivity, circular holes in a conventional coupler are equivalently substituted with supershape holes. In the frequency range from 8 to 12 GHz, the coupling values of two proposed couplers are 19±1 dB and 23±2 dB and the directivities are better than 20 dB. The simulation results show that almost 20 dB improvement in the directivity can be achieved as compared to a conventional coupler. The results are valuable for the design and development of broadband high directive waveguide couplers.

کلیدواژه‌ها [English]

  • Directional Coupler
  • Directivity
  • Superformula
[1].    S. B. Cohn and R. Levy, “History of microwave passive components with particular attention to directional couplers,” IEEE Trans. Microwave Theory Tech., vol. 32, no. 9, pp. 1046-1054, Sep. 1984.##
[2].    R. Levy, “Analysis and synthesis of waveguide multiaperture directional couplers,” IEEE Trans. Microw. Theory Tech., vol. 16, no. 12, pp. 995–1006, 1968.##
[3].    T. Sieverding, U. Papziner, and F. Arndt, “Mode-matching CAD of rectangular or circular multiaperture narrow-wall couplers,” IEEE Trans. Microw. Theory Tech., vol. 45, no.7, pp. 1034–1040, Jul. 1997.##
[4].    H. Oraizi, “Optimum design of multihole directional couplers with arbitrary aperture spacing,” IEEE Trans. Microw. Theory Tech., vol. 46, pp. 331–342, Apr. 1998.##
[5].    D. M. Pozar, Microwave Engineering, 4th ed. New York, John Wiley & Sons, 2012.##
[6].    H. A. Bethe, “Theory of diffraction by small holes,” Phys. Rev., vol. 66, pp. 163–182, Oct. 1944.##
[7].    S. B. Cohn, “Microwave coupling by large apertures,” Proc. IRE, vol. 40, pp. 996–699, June 1952.##
 [8].    V. M. Pandharipande and B. N. Das, “Coupling of waveguides through large apertures,” IEEE Trans. Microwave Theory Tech., vol. 26, pp. 209–212, Mar. 1978.##
 
[9].    Z. Jiang and Z. Shen, “Mode-matching analysis of large aperture coupling and its applications to the design of waveguide directional couplers,” Proc. Inst. Electr. Eng., Microwaves, Antennas, Propag., vol. 150, no. 6, pp. 422–428, Dec. 2003.##
[10]. J. Gielis, “A generic geometric transformation that unifies a wide range of natural and abstract shapes,” American Journal of Botany, vol. 90, no. 3, pp. 333-338, 2003.##
[11]. V. Paraforou, D. Caratelli, A. Yarovoy, "Design and full-wave analysis of supershaped patch antennas", M.Sc. Delft University of Technology, Nov. 2013.##
[12]. S. Keyrouz1 and D. Caratelli , “Dielectric Resonator Antennas: Basic Concepts, Design Guidelines, and Recent Developments at Millimeter-Wave Frequencies,” International Journal of Antennas and Propagation, vol. 1, pp. 1-20, 2016.##
[13]. S. Khajevandi, H. Oraizi, M. Poordaraee, “Design of planar dual-bandstop FSS using square loop enclosing superformula curves,” IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 5, pp. 731-734, May 2018.##
[14]. C. M. Jong, J. Gielis, D. Caratelli , “Application of Gielis transformation to the design of metamaterial structures,” Journal of Physics Conference Series, vol. 963, no. 1, 2008.##
[15].  A. Tayebi, D. Zarifi and M. Nasri, “Design of X-band Moreno cross-guide coupler based on superformula curves,” International Journal of RF and Microwave Computer-Aided Engineering, vol. 30, no. 3, pp. 1-6, 2020.##
[16]. M. Matsuura, “Gielis’ superformula and regular polygons,” Journal of Geometry, vol. 106, no. 2, pp. 383-403, Jul. 2015.##
[17]. A. Das and S. K. Das, Microwave Engineering, 2nd ed. New York, McGraw Hill, 2009.##
M. Nasri, D. Zarifi and A. U. Zaman, “A Wideband 3-dB Directional Coupler in GGW for Use in V-Band Communication Systems,” IEEE Access, vol. 8, pp. 17819-17823, 2020.##