On the frequency band of polarizers based on layered periodic dielectric structures

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Resumo

By numerically solving the dispersion equations and performing numerical simulations using the finite element method with the “eigenmode” option and the Floquet channel in the ANSYS HFSS software environment, a study and optimization of the parameters of a polarizer based on a layered periodic dielectric medium (dielectric–air) were conducted. The optimal values of parameters (the dielectric permittivity of the material, the ratio of the dielectric layer thickness to the structure period, and the thickness of the polarizer) were found, ensuring a relative bandwidth with an ellipticity coefficient of –3 dB exceeding 100%.

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Sobre autores

Van Bui

Moscow Institute of Physics and Technology (National Research University)

Email: vak@cplire.ru
Rússia, Institutsky per., 9, Dolgoprudny, Moscow region, 141700

V. Kaloshin

Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: vak@cplire.ru
Rússia, Mokhovaya str., 11, build. 7, Moscow, 125007

E. Frolova

Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences

Email: vak@cplire.ru
Rússia, Mokhovaya str., 11, build. 7, Moscow, 125007

Bibliografia

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2. Fig. 1. Layered periodic dielectric structure.

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3. Fig. 2. Dependences of the slowdown coefficients on frequency: FEM – solid curves, dispersion equations (dashed curves); parallel polarization (1, 3), perpendicular polarization (2, 4).

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4. Fig. 3. Dependences of the differential phase shift on the frequency at different permittivity (a) for c = 0.5 and ε = 2.6 (1); ε = 3.5 (2), ε 4.4 (3); ε = 6 (4), and also at different fill factors (b) for ε = 2.6 and c = 0.875 (1), c = 0.75 (2); c = 0.625 (3); c = 0.5 (4); c = 0.375 (5).

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5. Fig. 4. Level lines of the quantity fкр — fm/fm.

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6. Fig. 5. Floquet channel.

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7. Fig. 6. Reflection coefficient versus frequency: ε = 4.4, c = 0.76 (curves 1, 2); ε = 2.66, c = 0.563 [9] (3, 4); ε = 50, c = 0.0568 [5] (5, 6); parallel polarization (dashed), perpendicular polarization (solid).

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8. Fig. 7. Dependence of phase shift on frequency: ε = 4.4, c = 0.76 (1); ε = 2.66, c = 0.563 [9] (2); ε = 50, c = 0.0568 [5] (3).

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9. Fig. 8. Dependence of the amplitude ratio on frequency: ε = 4.4, c = 0.76 (1); ε = 2.66, c = 0.563 [9] (2); ε = 50, c = 0.0568 [5] (3).

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10. Fig. 9. Dependences of the ellipticity coefficient on frequency: ε = 4.4, c = 0.76 (1); ε = 2.66, c = 0.563 [9] (2); ε = 50, c = 0.0568 [5] (3).

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