Emin ÜNAL, Esra ÇELENK, Tuncay EGE

106106

Dalga Kılavuzlarındaki Bükmelerin Havacılık ve Havacılık Dışı Uygulamalara Etkileri

Waveguides, one of the most effective ways to carry electromagnetic energy, have application areas such as microwave communication systems, internet networks, radars, space exploration, optics and aviation. Sudden changes in the size or shape of the waveguides, such as bends and twists, can cause reflections and overall loss of efficiency. When such a change is required, the bends and twists of the waveguides must provide certain conditions to prevent reflections. This paper describes a new method to evaluate the attenuation constant for a circular dielectric or metallic waveguide having uniform curvature. When the radius of curvature “Ro” is large compared to the radius “a” of the waveguide (i.e. R_o>>a), field components can be obtained directly using toroidal coordinate system for the curved section of the waveguide instead of obtaining from those obtained for straight waveguide using perturbation techniques. Results obtained show excellent agreement with those given in the literature.
Anahtar Kelimeler:

dalga kılavuzu, bükmeler, mikrodalga

The Effects Of Bends In Waveguıdes For Aviation And Non-Aviation Applications

Waveguides, one of the most effective ways to carry electromagnetic energy, have application areas such as microwave communication systems, internet networks, radars, space exploration, optics and aviation. Sudden changes in the size or shape of the waveguides, such as bends and twists, can cause reflections and overall loss of efficiency. When such a change is required, the bends and twists of the waveguides must provide certain conditions to prevent reflections. This paper describes a new method to evaluate the attenuation constant for a circular dielectric or metallic waveguide having uniform curvature. When the radius of curvature “Ro” is large compared to the radius “a” of the waveguide (i.e. R_o>>a), field components can be obtained directly using toroidal coordinate system for the curved section of the waveguide instead of obtaining from those obtained for straight waveguide using perturbation techniques. Results obtained show excellent agreement with those given in the literature
Keywords:

Waveguides, Bends,

PDF

___

  • Tu. X., Li, M., Jiang, J., Goodwill ,D., Dumais, P., Bernier, E., Fu, H. and Geng, D. (2016). Compact low-loss adiabatic bends in silicon shallow etched waveguides. in Proceedings of IEEE International Conference on Group IV Photonics, pp. 48–49
  • Wu, X., Zhou,W. , Huang D., Zhang Z.,Wang Y., Bowers J. and Tsang , H. K. (2018). Low Crosstalk Bent Multimode Waveguide for On-chip Mode-Division Multiplexing Interconnects. in Conference on Lasers and Electro-Optics, OSA Terchnical Digest (online). paper JW2A.66.
  • Sun, C., Yu, Y., Chen, G. and Zhang, X. (2017). Ultra-compact bent multimode silicon waveguide with ultralow inter-mode crosstalk. Opt. Lett. 42(15). 3004–3007.
  • Xu,H. and Shi,Y. (2018). Ultra sharp multimode waveguide bending assisted with metamaterial based mode converters. Laser Photonics Rev. 12(3). 1700240.
  • Gabrielli,L.H., Liu, D., Johnson, S. G. and Lipson, M. (2012). On-chip transformation optics for multimode waveguide bends. Nat. Commun. 3(1). 1217.
  • Sheehan, R.N., Horne, S. and Peters F.H. (2008). The design of low-loss curved waveguides. Optical and Quantum Electronics. 40(14):1211-1218.
  • Jiang, X.,Wu, H. and Dai, D. (2018). Low-loss and low-crosstalk multimode waveguide bend on silicon. Optics Express 17680. Vol. 26. No. 13. Cameron, A.A. (2012). Optical waveguide technology and its application in head-mounted displays. Head and Helmet-Mounted Displays XVII; and Display Technologies and Applications for Defense, Security, and Avionics VI. 83830E https://doi.org/10.1117/12.923660.
  • Heck, M., Bauters, J., Davenport, M., Spencer, D. and Bowers, J. (2014). Ultra-low loss waveguide platform and its integration with silicon photonics. Laser Photonics Rev. vol. 8. no. 5. pp. 667–686.
  • Ünal, E. (1994). Evaluation of the attenuation constant for curved cylindrical hollow dielectric or metallic waveguide, A Ph. D. Thesis. Electrical and Electronics Engineering. University of Gaziantep.
  • Miyagi, M., Harada, K. and Kawakami, S. (1984). Wave propagation and attenuation in the general class of circular hollow waveguides with uniform curvature. IEEE Trans. Microwave Theory Tech. vol.MTT-32. pp.513-521.
  • Marcatili, E.A.J. and Schmeltzer, R.A. (1964). Hollow metallic and dielectric waveguides for long distance optical transmission and lasers Bell Syst. Tech.J. vol.43. pp.1783-1809.
  • Marhic, M.E. (1981). Mode-coupling analysis of bending losses in IR metallic waveguides. Appl. Opt. vol 20. pp.3436-3441.
  • Miyagi, M. (1985). Complex propagation constant of bent hollow waveguise with arbitrary cross section. IEEE Trans. Microwave Theory Tech. vol. MTT-33. pp.15-19.
  • Bohn, E.V. (1968). Introduction to electromagnetic fields and waves. Addison-Wesley.
  • Unger, H.G. (1957). Circular electric wave transmission in dielectric coated waveguide. Bell Syst.Tech.J. vol.36. pp.1253-1278.
Journal of Aviation Research-Cover
  • Yayın Aralığı: Yılda 2 Sayı
  • Başlangıç: 2019
  • Yayıncı: Maltepe Üniversitesi
Arşiv
Sayıdaki Diğer Makaleler

Gig Ekonomisinin Havacılık Sektöründeki Geleceği

Gülaçti ŞEN, Ahmet Hakan ARSLAN, Erhan BÜTÜN

Türkiye’de Havacılık Sektörü Çalışanlarında Örgütsel Adaletin İşten Ayrılma Niyetine Etkisinde İş Tatmininin Aracılık Rolü: Kesitsel Bir Araştırma

Ümit DOĞAN, Şafak AKTEMUR, Mustafa UZGÖR, Hakkı Okan YELOĞLU

Rezistif Kuvvet Sensörü Uygulamasıyla Uçak Tuvaletleri Vakum Sistemlerinin İyileştirilmesi

Kerim İsmail KARACA, Mehlika KARAARSLAN

Dalga Kılavuzlarındaki Bükmelerin Havacılık ve Havacılık Dışı Uygulamalara Etkileri

Emin ÜNAL, Esra ÇELENK, Tuncay EGE

Ekip Kaynak Yönetiminin Sivil Havacılık Kazalarını Azaltmasındaki Etkisi

Kağan Cenk MIZRAK, Filiz MIZRAK