Physically Realizable Antenna Equivalent Circuit Generation
Metadatos
Afficher la notice complèteAuteur
Haack, Micah; Jenkins, Ronald; Mai, Wending; Mackertich Sengerdy, Galestan; Campbell, Sawyer D.; Fernández Pantoja, Mario Alberto; Werner, Douglas H.Editorial
Institute of Electrical and Electronics Engineers
Materia
Antenna equivalent circuit Drude-Lorentz model Physically realizable circuit
Date
2024-02-26Referencia bibliográfica
M. P. Haack et al., "Physically Realizable Antenna Equivalent Circuit Generation," in IEEE Access, vol. 12, pp. 33652-33658, 2024, doi: 10.1109/ACCESS.2024.3370030
Résumé
This work introduces a new equivalent circuit generation method which can compute an accurate equivalent
circuit representation for the known/measured impedance characteristics of antennas, which may assist in
matching circuit design, non-Foster matching network design, and deep-learning antenna design. The method
utilizes a modified Drude-Lorentz resonator representation inspired by optical material dispersion modeling
to create multiple sub-circuits based on determined resonances in the impedance spectrum. Each computed
sub-circuit is necessarily composed of physically realizable resistors, capacitors, and inductors, and they
are connected in series to accurately reconstruct the device’s corresponding impedance characteristics over
a specified region of interest. The process is automated and applicable to a wide range of antennas and
electromagnetic devices with multiple resonance phenomena. Current equivalent circuit design methods are
limited by a lack of generalization and can require complex, active, or non-realizable circuit topologies. The
proposed Drude-Lorentz-based approach can provide valuable insight into an antenna’s resonant behavior
while remaining general-purpose and only requiring passive components which are physically realizable.
This improved generality is achieved by not requiring physical insights, but rather only utilizing the
impedance data alone. Additionally, the method creates simpler circuits than other general methods, requiring
less components and component types. This method is employed to create equivalent circuits of four different
exemplary types of antennas, a patch antenna, a loop antenna, a spherical helix antenna, and a metantenna
unit cell. The impedances generated from these circuit examples are compared with results of their full-wave
simulation counterparts and found to be in excellent agreement.