Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2258350
Karoline R. Lima, H. Andrade, A. Sombra, M. Sousa, José F. de Lima, G. Fontgalland, I. B. T. D. Silva
{"title":"Estimation and Mapping of the Received Power Level of Digital Signals TV Using Spatial Interpolation Methods","authors":"Karoline R. Lima, H. Andrade, A. Sombra, M. Sousa, José F. de Lima, G. Fontgalland, I. B. T. D. Silva","doi":"10.1590/2179-10742022v21i2258350","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2258350","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42188444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2259250
A. Y. Abdulrahman
—The amount of water deposits on the receiving dish antenna can cause additional losses and consequently contaminate the actual slant-path attenuation. Only a few research works have been reported in the literature on the measurement of wet antenna attenuation (WAA) and the technique(s) of extracting the losses from the total attenuation in tropical and equatorial climates, characterized with heavy rainfall intensities of convective kind. Therefore, the adverse effects of antenna losses due to rain on a 11. 843 GHz satellite link and the methodology of extracting the losses from the measured rain-induced attenuation have been reported in this article. A vertically polarized parabolic dish with diameter and elevation of 0.3 m and 42 0 , respectively have been used in the study. The measured results at 11.843 GHz were frequency-scaled in order to obtain their equivalents at 18.585 and 20.2 GHz; and then compared with those reported from Malaysia and Canada. The study will provide useful information in the planning and designing of an efficient and reliable Earth-satellite communication link in tropical climates. The experimental results also can further enrich the ITU-R databank.
{"title":"Analysis of Wet Antenna Losses on 11.843 GHz Slant Path in Nigeria and Comparison with Some Tropical Climates","authors":"A. Y. Abdulrahman","doi":"10.1590/2179-10742022v21i2259250","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2259250","url":null,"abstract":"—The amount of water deposits on the receiving dish antenna can cause additional losses and consequently contaminate the actual slant-path attenuation. Only a few research works have been reported in the literature on the measurement of wet antenna attenuation (WAA) and the technique(s) of extracting the losses from the total attenuation in tropical and equatorial climates, characterized with heavy rainfall intensities of convective kind. Therefore, the adverse effects of antenna losses due to rain on a 11. 843 GHz satellite link and the methodology of extracting the losses from the measured rain-induced attenuation have been reported in this article. A vertically polarized parabolic dish with diameter and elevation of 0.3 m and 42 0 , respectively have been used in the study. The measured results at 11.843 GHz were frequency-scaled in order to obtain their equivalents at 18.585 and 20.2 GHz; and then compared with those reported from Malaysia and Canada. The study will provide useful information in the planning and designing of an efficient and reliable Earth-satellite communication link in tropical climates. The experimental results also can further enrich the ITU-R databank.","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44411261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2259409
Ren Wang, Tao Tang, M. Olaimat, Yuanzhi Liu
{"title":"Frequency Reconfigurable Near-Zero Refractive Index Material for Antenna Gain Enhancement Applications","authors":"Ren Wang, Tao Tang, M. Olaimat, Yuanzhi Liu","doi":"10.1590/2179-10742022v21i2259409","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2259409","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44716008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2256115
A. Gomes Neto, J. C. Silva, I. B. G. Coutinho, Saulo Souto Camilo Filho, Danila Araújo Santos, Bruno Lima Cavalcanti de Albuquerque
{"title":"A Defected Ground Structure Based on Matryoshka Geometry","authors":"A. Gomes Neto, J. C. Silva, I. B. G. Coutinho, Saulo Souto Camilo Filho, Danila Araújo Santos, Bruno Lima Cavalcanti de Albuquerque","doi":"10.1590/2179-10742022v21i2256115","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2256115","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45635349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2257150
V. Slyusar, I. Sliusar, Sergey Sheleg
{"title":"Broadband Antennas Based on the Double Moebius Strip","authors":"V. Slyusar, I. Sliusar, Sergey Sheleg","doi":"10.1590/2179-10742022v21i2257150","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2257150","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41460078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2257631
Barrathy Vagananthan, Y. S. Lee, K. You, H. Gan, F. H. Wee
{"title":"Investigate the Effect of Dielectric Properties on Microwave Absorption of Pyramidal Microwave Absorber","authors":"Barrathy Vagananthan, Y. S. Lee, K. You, H. Gan, F. H. Wee","doi":"10.1590/2179-10742022v21i2257631","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2257631","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46265662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2254815
M. Farah, F. Salah-Belkhodja, K. Khelil
{"title":"A Design of a Compact Microwave Diplexer in Microstrip Technology Based on Bandpass Filters Using Stepped Impedance Resonator","authors":"M. Farah, F. Salah-Belkhodja, K. Khelil","doi":"10.1590/2179-10742022v21i2254815","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2254815","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46037476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/2179-10742022v21i2256950
P. Kadam, A. Deshmukh
{"title":"Variations of Compact Rectangular Microstrip Antennas Using Defected Ground Plane Structure","authors":"P. Kadam, A. Deshmukh","doi":"10.1590/2179-10742022v21i2256950","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i2256950","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45187232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-01DOI: 10.1590/2179-10742022v21i1253618
W. G. da Silva, A. Campos, J. R. F. Guerra, I. B. T. da Silva
{"title":"Radiation Efficiency of an Electrically Small Dual-band UHF Microstrip Patch Antenna Using Wheeler Cap Method","authors":"W. G. da Silva, A. Campos, J. R. F. Guerra, I. B. T. da Silva","doi":"10.1590/2179-10742022v21i1253618","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i1253618","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45719059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-01DOI: 10.1590/2179-10742022v21i1255112
L. M. da Silva, M. T. de Melo, M. G. A. R. Santos, A. Serres
{"title":"Phase Adjustment of S-Parameters from Coupled Resonator Filters","authors":"L. M. da Silva, M. T. de Melo, M. G. A. R. Santos, A. Serres","doi":"10.1590/2179-10742022v21i1255112","DOIUrl":"https://doi.org/10.1590/2179-10742022v21i1255112","url":null,"abstract":"","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46709973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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