{"title":"Efficiency of Frequency Oriented Approach for Resonant Wireless Power Transfer","authors":"V. Mateev, Michail Dipchev, I. Marinova","doi":"10.1109/ELECTRONICA55578.2022.9874428","DOIUrl":"https://doi.org/10.1109/ELECTRONICA55578.2022.9874428","url":null,"abstract":"This work presents modeling of a wireless power transmission system, based on a circuit model taking into account electromagnetic coupling and coils system mutual inductance. The power transmission is based on coupling of resistive induction coils with ferromagnetic concentrators. Electromagnetic field modeling is performed by a 3D finite element method model, applied to estimate coils self and mutual inductance in different axial relative distances. Resonant frequencies of transmitting and receiving coils are calculated due to mutual induction variation. The obtained results are analyzed from the point of view of the electromagnetic field in wireless power transfer in order to obtain optimal transmission power under various conditions such as transmitting distance, mutual inductance, frequency variation and output load.","PeriodicalId":443994,"journal":{"name":"2022 13th National Conference with International Participation (ELECTRONICA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129554961","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}
N. Atanasov, G. Atanasova, B. Atanasov, Manol Avramov, Nikolay Hristov
{"title":"Numerical and Experimental Evaluation of a Textile Wearable Antenna for On-body Communications","authors":"N. Atanasov, G. Atanasova, B. Atanasov, Manol Avramov, Nikolay Hristov","doi":"10.1109/ELECTRONICA55578.2022.9874421","DOIUrl":"https://doi.org/10.1109/ELECTRONICA55578.2022.9874421","url":null,"abstract":"This paper presents the results from investigation of the parameters and characteristics of a fully textile wearable antenna with a shielding element in its structure for on-body wireless communication. Numerical simulations and experimental measurements of S-parameters were performed in the frequency range of 2.3 to 2.6 GHz for line-of-sight and non-line-of-sight scenarios using a homogeneous flat phantom. Specific absorption rate (SAR) generated by the fully textile wearable antenna is also assessed, and SAR distributions in several planes are presented.","PeriodicalId":443994,"journal":{"name":"2022 13th National Conference with International Participation (ELECTRONICA)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116852144","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}