THE ELECTROMAGNETIC CHARACTERISTICS OF LOOP ANTENNAS POSITIONED IN CYLINDRICALLY STRATIFIED MEDIA
A loop antenna positioned in a cylindrically stratified media provides a canonical foundation for the analysis of many interesting problems: the design of loop antennas for both communications and geophysical sensing; the design of dielectric rod antennas and fiber optic components; and even the occurrence of color blindness in the human eye. This presentation discusses an analytical formulation of a loop antenna in cylindrically stratified media leading to the solution for the antenna’s current distribution in response to a generally accepted excitation; the determination of input impedance and its dissociation into components attributable to radiation and surface wave excitation; and associated radiation characteristics. The antenna is modeled using a thin wire current distribution positioned as a boundary condition discontinuity at the cylindrically stratified layer interface. A Debye potentials based formulation leads to formal exact expressions for all electromagnetic field components. Input impedance is evaluated using numerical quadrature, residue theory, and a large argument tail approximation to the integral expression. Radiation characteristics are evaluated using a steepest descent technique. The formulation and results have been validated through comparisons to results presented in the literature, mostly notably Smith’s work published in Johnson and Jasik’s Antenna Engineering Handbook. Future work on this topic will focus on evaluating the mutual coupling between antenna elements positioned both in echelon, and in coplanar configuration, in both LIH (linear, isotropic, and homogenous) and non LIH media.
Date and Time
Location
Hosts
Registration
- Date: 11 Jan 2021
- Time: 06:00 PM to 07:00 PM
- All times are (UTC-05:00) Eastern Time (US & Canada)
-
Add Event to Calendar
- Endicott, New York
- United States
- Starts 09 January 2021 10:17 AM
- Ends 11 January 2021 10:17 AM
- All times are (UTC-05:00) Eastern Time (US & Canada)
- No Admission Charge