On the Equivalent Radius of a Radiating Slot in Impedance Calculations

Abstract

Abstract-By means of evaluating impedance of a slot by spectral domain analysis, the radius of the equivalent cylindrical dipole is found in terms of slot parameters. The analysis proceeds from the integral equation for the surface current density induced on a planar strip. Explicit expressions for real and imaginary parts of impedances are derived in visible and invisible regions respectively.

Parametric Study of Waveguide Slots and Analysis of Radiation Pattern for the Design of Waveguide Array Antenna

“…It assumes that the radiated power is proportional to the slot active conductance. The array aperture distribution [9,16] and input impedances [10,15] depend upon the knowledge of these slot active admittance.…”

Evaluation of the Input Impedance and Impedance Quality Factor of a Dipole in Spatial and Spectral Domains

“…Thus, future work could incorporate more advanced techniques for the numerical evaluation of integrals. Secondly, the Induced EMF method is only valid for very thin dipoles in terms of wavelength which is also true for the calculation of the equivalent radius in (8). …”

“…Another way to determine Q is by spectral analysis, which is, in turn, based on the integration of the radiation pattern in visible and invisible space [6][7][8]. Integration in visible space (over real angles), which is well-known and demonstrated in the literature [5], facilitates the classic calculation of the radiation resistance of an antenna.…”

Green's Function Derivation of an Annular Waveguide for Application in Method of Moment Analysis of Annular Waveguide Slot Antennas

“…This is among the main advantages of AWSA arrays, which is open to more theoretical investigations in the future. As the main standard requirement for such an improvement, Green's function formulation of the annular waveguide and MoM analysis of the slotted annular waveguide (AWSA) are the vital steps to be performed as in other similar design approaches [14][15][16][17][18][19][20][21][22][23].…”