The Near and Far Field Distributions of a Thin Circular Loop Antenna in a Radially Multilayered Biisotropic Sphere

Single-Series Solution to the Radiation of Loop Antenna in the Presence of a Conducting Sphere

“…For this reason numerical integration is carried out instead by implementing the trapezoidal rule for F equispaced points within the interval Φ ∈ (0, 2π). Through this approach the arbitrary function of the current I(Φ) is integrated straightforwardly with no need of prior expansion to Fourier series [9]. The basic disadvantage of the proposed method is the computational cost owed to the numerical integration but such a procedure meets no difficulty.…”

“…In [8] the magnetostatic theory is used for the determination of the image of a circular loop current in front of a permeable sphere. In [9] a complete analysis for a circular antenna inside a spherical biisotropic medium is provided. Also in [10] the method of moments is implemented to specify the current distribution of a circular loop in the presence of a layered chiral sphere.…”

Equation Solution for the Current in Radial Impedance Monopole on the Perfectly Conducting Sphere

“…First of all, it concerns numerical-analytical modeling of the radiation characteristics of such antennas. However, because of complexity of realization of such modeling these questions are not described very well in the literary sources [1][2][3][4]. What is more, even in these rare papers the simple models (such as electrically short dipoles) are considered as radiators despite that a rather developed theoretical basis exists for the analysis of impedance vibrators [5][6][7][8][9][10][11][12][13][14].…”

Electromagnetic Fields of Two Thin Circular Loop Antennas in a Radially Multilayered Biisotropic Cylinder

“…The mathematical treatment here is based on the DGF in the form of an eigenfunction expansion using the normalized cylindrical vector wave functions, and such method is very general, compact, and straightforward. It has also been used in the authors' study for the geometry of a multilayered biisotropic sphere recently [18]. While for this biisotropic cylindrical structure, the analytical form of all field components in both near and far field zones for different current excitations is derived in the following sections, and numerical examples are presented to show the unique effects of the magnetoelectric cross coupling parameters on the radiated field characteristics of circular loop antennas.…”

“…On the other hand, the radiation of canonical sources in unbounded and bounded biisotropic chiral regions has gained some attention in electromagnetic community more recently, and the studies carried out include the radiation from a thin wire antenna in an unbounded reciprocal chiral medium [4][5][6], dipole antenna radiation in the presence of homogeneous and radially inhomogeneous chiral spheres, cylinders, and grounded biisotropic chiral slabs, respectively [7][8][9][10][11][12][13][14][15], electromagnetic fields excited by a circular loop antenna in an unbounded chiral medium, above a chiral half space as well as in a radially multilayered biisotropic sphere [16][17][18].…”