Scattering from perfectly conducting and resistive strips on a grounded dielectric slab

Abstract

Abstract-The scattering properties of perfectly conducting and resistive strips are predicted for strips which are located on a dielectric slab hacked by a perfectly conducting ground plane. The spectral domain Green's function is used to relate the currents and fields on the strip, and the resulting integral equation is solved using the method of moments. Both TE and TM strips are examined using piecewise linear and pulse subdomain basis functions, respectively, to model the current on the strip. Calculated results are compared with results measured at the NASA Langley Research Center.

Radiation and resonant frequency of a resistive patch and uniaxial anisotropic substrate with entire domain and roof top functions

“…However, the designers should carefully check for the anisotropic effects in the substrate materials with which they will work. Since the effect of non-zero surface resistance on the scattering properties of a microstrip antenna on a uniaxial substrate has not yet been treated [5], only for a few works have incorporated this effect on an isotropic substrate [3,6], a number of results pertaining to the case of uniaxial substrate are presented in this paper.…”

Wide-band/angle Blazed Surfaces using Multiple Coupled Blazing Resonances

“…Planar and printed gratings, such as those shown in Fig. 1c,d have also been shown to blaze efficiently 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 . Blazed gratings have been used from microwaves to optics, and in different applications such as Littrow mounts 6 and external cavity lasers, frequency scanning antenna reflectors 38 39 40 41 42 , and Radar Cross Section (RCS) reduction surfaces 19 20 21 , to name a few.…”

“…Blazed gratings 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 can reflect an oblique incident wave back in the direction of incidence with low or even zero specular scattering, unlike mirrors and metal plates. The scattering of the incident wave into diffraction orders is dictated by the grating periodicity, which is in the order of the free-space wavelength for blazing.…”

“…To this end we first study a single resonant strip 37 in the unit-cell as shown in Fig. 1d and e. In previous studies on strip loaded grounded dielectric gratings 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 , the strip width was large (typically around half the cell size) and held constant, while other parameters such as the dielectric thickness was adjusted to observe a blazing phenomenon. In this work, we utilize a standard single layer microwave substrate with a given fixed thickness, much thinner than previous works.…”

Characterization of Superstrate-Loaded Resistive Rectangular Patch Antenna

“…The superstrate of thickness d with relative permittivity εr2 is obtained by depositing a dielectric layer on the top of the substrate (region 2). The resistive boundary condition at the surface of the patch is given by [3,10]: The study is performed by using a full wave analysis and Galerkin's moment method in the spectral domain to examine the scattering properties of a superstrate loaded rectangular patch antenna with a surface resistance, in which we extend our study [2,3] to the case of this proposed geometry.…”