Using Antenna Arrays with Only One Active Element for Beam Reconfiguration and Sensitive Study in Dielectric Media
| Autor: | Francisco J. Ares-Pena, Borja Bayón-Buján, María Elena López-Martín, J. A. Rodriguez-Gonzalez, Aaron A. Salas-Sanchez |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Chemical technology Acoustics mutual coupling Control reconfiguration TP1-1185 Dielectric Biochemistry Article Atomic and Molecular Physics and Optics Analytical Chemistry Physical Phenomena Antenna array antenna arrays Side lobe dielectric constant Electric Impedance Electrical and Electronic Engineering Antenna (radio) beam reconfiguration Driven element Instrumentation Electrical impedance Beam (structure) |
| Zdroj: | Sensors Volume 21 Issue 18 Sensors, Vol 21, Iss 6019, p 6019 (2021) Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | Antenna array pattern reconfiguration is usually achieved by changing the relative amplitudes and/or phases of the excitation distribution present in the array, at the cost of complex feeding networks. In this work, the mechanical displacement of a parasitic array perpendicular to another array with a single driven element is proposed. Additionally, the antenna is optimized addressing the variation of its response led by changes of the environmental dielectric constant of a surrounding gaseous medium. In such a way, a novel multipurpose antenna of utmost simplicity is obtained. From the computation of the self and mutual impedances, a control of the antenna radiation pattern by means of the induced currents in the parasitic elements is modelled. To illustrate the procedure, the technique will be applied to the variation of the side lobe level of a pencil beam and to obtain a flat-topped broadside beam from the same pencil beam, something with high interest for satellite applications. The proposed methodology represents an advance on the development of multipurpose antennas which resounds in simplicity not only in the reconfiguration of antenna beams, but in applications for the detection of particulate matter and/or measurements of the atmospheric dielectric constant. |
| Databáze: | OpenAIRE |
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