Analysis of the Combinatory Effect of Uniaxial Electrical and Magnetic Anisotropy on the Input Impedance and Mutual Coupling of a Printed Dipole Antenna

Abstract

The main objective of this work is to investigate the combinatory effects of both uniaxial magnetic and electrical anisotropies on the input impedance, resonant length and the mutual coupling between two dipoles printed on an anisotropic grounded substrate. Three different configurations: broadside, collinear and echelon are considered for the coupling investigation. The study is based on the numerical solution of the integral equation using the method of moments through the mathematical derivation of the appropriate Green's functions in the spectral domain. In order to validate the computing method and evaluated Matlab® calculation code, numerical results are compared with available literature treating particular cases of uniaxial electrical anisotropy; good agreements are observed. New results of dipole structures printed on uniaxial magnetic anisotropic substrates are presented and discussed, with the investigation of the combined electrical and magnetic anisotropies effect on the input impedance and mutual coupling for different geometrical configurations. The combined uniaxial (electric and magnetic) anisotropies provide additional degrees of freedom for the input impedance control and coupling reduction.

Analysis of gyrobianisotropic media effect on the input impedance, field distribution and mutual coupling of a printed dipole antenna

“…Particularly, the effect of the complex elements on the input impedance, resonant length and mutual coupling of two printed dipoles and hence, antenna performance according to the collinear, echelon and broadside configurations. The study extends our previous our works 10 , 22 , 23 , where only anisotropic and bi-isotropic medium cases were treated. It is based on a spectral theoretical formulation and a numerical solution technique using the moments method in the spectral domain; a method that is well known in the analysis of microwave planar structures 7 , 27 .…”

“…It is shown that surface waves increase the mutual coupling in a fixed linear arrangement of the printed dipoles and contribute to the cross-coupling. This also shows that the complex media present a great potential in the design of innovative microwave components 22 , 23 .…”

“…In 22 , a theoretical study for investigating the electromagnetic field distributions and input impedance of a dipole antenna printed on a uniaxial anisotropic medium is presented. In 23 , the mutual coupling of two dipole antennas, printed on an anisotropic substrate, is studied for three different configurations: broadband, linear gradient and gradient after the evaluation of the input impedance. It is shown that surface waves increase the mutual coupling in a fixed linear arrangement of the printed dipoles and contribute to the cross-coupling.…”

Temperature Sensing Shape Morphing Antenna (ShMoA)

“…When the temperature is between T 1 and T 2 , the antenna switches to a dipole antenna configuration ( Figure 2 b), and the impedance changes to 73 + 9 j Ω. Although a standard dipole is better at radiating geometrically, the improperly matched input impedance of the antenna will cause an overall weaker radiation [ 45 , 46 ]. As a result, the minimal magnitude of the return loss S 11 around 950 MHz decreases from 23 dB to 16 dB.…”

Electronic packaging cabinets simplified modeling, simulation, and experimental validation for systems engineering

“…Some miniaturization methods useful in electronic systems have been reported recently. [1][2][3][4][5][6][7][8][9][10][11][12][13] In that context, system mathematical modeling and subsequent thermal management optimization are highly desirable to deal with system energy efficiency demand, costs reduction, and environmental impact minimization. In that sense, the requirement for system response direct assessment or computer simulation of a multitude of viable configurations for different operating parameters sets needs to be tackled by fast and sufficiently accurate models.…”