Возможность расширения полосы рабочих частот искусственного магнитного проводника на основе полосно-пропускающей частотно селективной структуры

Abstract

The presence of functional connections between the characteristics of an artificial magnetic conductor, the parameters of structures with frequency selective surfaces and the dielectric layer determine the possibility of expanding the range of operating frequencies. An analytical expression for such relationships is the formula for estimating the phase of the reflection coefficient from an artificial magnetic conductor obtained using the theory of electrical circuits and long lines. With the help of the presented analytical expressions the estimation of ways of expansion of a range of operating frequencies of an artificial magnetic conductor on the basis of band-pass frequency selective structures is carried out. UC-PBG structure was chosen as the basic calculation model. The purpose of numerical calculations of the frequency dependence of the phase of the reflection coefficient on the artificial magnetic conductor was to study ways of modifying the basic model of the artificial magnetic conductor, which provides an extension of the operating frequency band while maintaining the value of the resonant, i.e., the Central frequency of this band. Two variants of such modification are considered. The numerical calculation confirmed that the decrease in the dielectric permeability of the layer between the frequency selective surface and the conductive screen while increasing the thickness of the layer and the element size of the frequency selective structure allows to increase the band of the operating frequencies of the artificial magnetic conductor. Reduction of the dielectric permeability of the layer from 10.2 to 1.2 with doubling the layer thickness and the size of the lattice element allowed to expand the band of operating frequencies from 9% to 16%. The numerical calculation showed that the increase in the thickness of the dielectric layer without reducing the dielectric permeability does not allow to expand the range of operating frequencies of the artificial magnetic conductor (in contrast to the artificial magnetic conductor based on capacitive grids).

• искусственный магнитный проводник
• частотно селективная поверхность
• ЧИСЛЕННЫЙ РАСЧёТ
• полоса рабочих частот
• резонансная частота
• artificial magnetic conductor
• frequency selective surface
• numerical calculation
• band of operating frequencies
• resonant frequency

For citation

References

1. D. Sievenpiper, L. Zhang, R. J. Broas, N. G. Alexopolous, E.Yablonovitch. High-Impedance electromagnetic surfaces with a forbidden frequency band // IEEE Transactions on microwave theory and techniques, vol.47, no. 11, pp. 2059-2074, Nov. 1999.
2. Y. Zhang, J.von Hagen, M. Younis, C. Fischer, W. Wiesbeck. Planar artificial magnetic conductors and patch antennas // IEEE Transactions on antennas and propagation, vol.51, no. 10, pp. 2704-2711, Oct. 2003.
3. Ю. Н. Казанцев, В. Н. Аплеталин. Искусственные магнитные проводники на основе решеток емкостного типа //Радиотехника и электроника, т.52, №4, с. 415-423, 2007.
4. R. Coccioli, F-R. Yang, K-P Ma, T. Itoh. Aperture-coupled patch antenna on UC-PBG substrate // IEEE Transactions on microwave theory and techniques, vol.47, no. 11, pp. 2123-2129, Nov. 1999.
5. M. A. Hiranandani, A. B. Yakovlev, A. A. Kishk. Artificial magnetic conductors realised by frequency-selective surfaces on a grounded dielectric slab for antenna applications // IEE Proceedings - Microwaves, antennas and propagation, vol.153, no. 5, pp. 487-493, Oct. 2006.
6. J. R. Sohn, K. Y. Kim, J.-H. Lee, and H.-S. Tae. Comparative study on various artificial magnetic conductors for low-profile // Progress in electromagnetics Research, no. 61, pp. 27-37, 2006.
7. D.J. Kern, D.H. Werner, A. Monorchio, L.Lanuzza, M.J. Wilhelm. The design synthesis of multiband artificial magnetic conductors using high impedance frequency selective surfaces // IEEE Transactions on antennas and propagation, vol.53, no. 1, pp. 8-16, 2005.
8. C.R.Simovski, P. de Maagt, and I. V. Melchakova. High-Impedance surfaces having stable resonance with respect to polarization and incidence angle // IEEE Transactions on antennas and propagation, vol.53, no. 3, pp. 908-914, march 2005.