Perfect Absorption by an Array of Lossy Dipoles Located Close to a Ground Plane
| Autor: | Daniel Silverstein, Yehuda Leviatan, Ofer Markish |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry 020206 networking & telecommunications 02 engineering and technology Input impedance Wavelength Optics Conductive ink 0202 electrical engineering electronic engineering information engineering Dielectric loss Electrical and Electronic Engineering Absorption (electromagnetic radiation) business Electrical impedance Electrical conductor Ground plane |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 67:5991-5996 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2019.2916635 |
| Popis: | This paper presents a thin absorbing structure comprising an array of finitely conductive terminal-loaded dipoles spaced about half a wavelength apart and located above a ground plane. We show that if the antennas are terminated with proper load impedance, instead of a conjugate-matched one, a perfect absorption can be attained even when the array lies close to the ground plane. We also identify a threshold height below which the absorption efficiency rapidly drops and perfect absorption cannot be realized. The idea is illustrated via a concrete example of array of dipoles printed with conductive ink technology on a Kapton HN flexible film backed by a rigid Rogers 4350B substrate. The array is designed for perfect absorption at 3.45 GHz when it is located one-tenth of a wavelength above the ground plane. Good agreement between simulation and measurement results is demonstrated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|