Joabson Nogueira de Carvalho

Dr. Joabson Nogueira de Carvalho

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Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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29 March 2024 in Micromachines
Verified
Journal Article
Open access
PDF file
Alfrêdo Gomes NetoAlfrêdo Gomes Neto
Alfrêdo Gomes Neto
JSJefferson Costa Silva
Jefferson Costa Silva
JCJoabson Nogueira de Carvalho
Joabson Nogueira de Carvalho
CPCustodio Peixeiro
Custodio Peixeiro
A review on planar printed structures that are based on Matryoshka-like geometries is presented. These structures use the well-known principle of Matryoshka dolls that are successively nested inside each other. The well-known advantages of the planar printed technology and of the meandered nested Matryoshka geometries are combined to generate miniaturized, multi-resonance, and/or wideband configurations. Both metal and complementary slot structures are considered. Closed and open configurations were analyzed. The working principles were explored in order to obtain physical insight into their behavior. Low-cost and single-layer applications as frequency-selective surfaces, filters, antennas, and sensors, in the microwave frequency region, were reviewed. Potential future research perspectives and new applications are then discussed.
21 March 2018 in IOP Conference Series: Materials Science and Engineering
Verified
Conference Paper
Open access
PDF file
GAGeoflly L. Adonias
Geoflly L. Adonias
JCJoabson Nogueira de Carvalho
Joabson Nogueira de Carvalho
In Brazil, one of the most important telecommunications systems is broadcast television. Such relevance demands an extensive analysis to be performed chasing technical excellence in order to offer a better digital transmission to the user. Therefore, it is mandatory to evaluate the quality and strength of the Digital TV signal, through studies of coverage predictions models, allowing stations to be projected in a way that their respective signals are harmoniously distributed. The purpose of this study is to appraise measurements of digital television signal obtained in the field and to compare them with numerical results from the simulation of the Dominant Path Model. The outcomes indicate possible blocking zones and a low accumulated probability index above the reception threshold, as well as characterise the gain level of the receiving antenna, which would prevent signal blocking.
19 February 2024 in Preprints.org
Verified
Preprint
Open access
PDF file
Alfrêdo Gomes NetoAlfrêdo Gomes Neto
Alfrêdo Gomes Neto
JSJefferson Costa Silva
Jefferson Costa Silva
JCJoabson Nogueira de Carvalho
Joabson Nogueira de Carvalho
CPCustodio Peixeiro
Custodio Peixeiro
A review on planar printed structures that are based on Matryoshka-like geometries is presented. These structures use the well-known principle of Matryoshka dolls that are successively nested inside each other. The well-known advantages of the planar printed technology and of the meandered nested Matryoshka geometries are combined to generate miniaturized, multi-resonance and/or wideband configurations. Both metal and complementary slot structures are considered. Closed and open configurations are analyzed. The working principles are explored do get physical insight of their behavior. Low cost and single layer applications as frequency selective surfaces, filters, antennas, and sensors, in the microwave frequency region, are reviewed. Potential future research perspectives and new applications are discussed.