Pub Date : 2021-12-10DOI: 10.1109/CAPS52117.2021.9730553
Nikunj Goyal, R. Panwar
In this article, a graphene-based quad-horn-shaped thin and broadband metamaterial absorber has been designed and critically analyzed at terahertz (THz) frequencies. The absorbing structure attains a broad absorption bandwidth of 2.5 THz within the frequency range of 1.7 to 4.2 THz with more than 90% absorptivity. It is found to possess two absorption peaks at 2.0 and 3.4 THz with 98.8% and 96% absorptivity, respectively. Besides, the consequence of varying the graphene's chemical potential the change in absorptivity response of the structure is also studied. Further, the structure is also analysed with the variation in angular stability and polarization insensitivity. The distribution of electric field and surface current density plots are utilized to be aware of the absorption losses in the designed structure. The results suggested the potentiality of the absorber be applied in various practical applications at THz frequencies.
{"title":"Graphene-Based Quad-Horn Metamaterial Absorber for THz Applications","authors":"Nikunj Goyal, R. Panwar","doi":"10.1109/CAPS52117.2021.9730553","DOIUrl":"https://doi.org/10.1109/CAPS52117.2021.9730553","url":null,"abstract":"In this article, a graphene-based quad-horn-shaped thin and broadband metamaterial absorber has been designed and critically analyzed at terahertz (THz) frequencies. The absorbing structure attains a broad absorption bandwidth of 2.5 THz within the frequency range of 1.7 to 4.2 THz with more than 90% absorptivity. It is found to possess two absorption peaks at 2.0 and 3.4 THz with 98.8% and 96% absorptivity, respectively. Besides, the consequence of varying the graphene's chemical potential the change in absorptivity response of the structure is also studied. Further, the structure is also analysed with the variation in angular stability and polarization insensitivity. The distribution of electric field and surface current density plots are utilized to be aware of the absorption losses in the designed structure. The results suggested the potentiality of the absorber be applied in various practical applications at THz frequencies.","PeriodicalId":445427,"journal":{"name":"2021 International Conference on Control, Automation, Power and Signal Processing (CAPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128955636","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 : 2021-12-10DOI: 10.1109/CAPS52117.2021.9730661
Jai Mangal
This paper exhibits the designing methodology of a compact three-port circular antenna for unlicensed ultra-wideband frequency range applications. The attributes of the projected antenna are 24mmx24mmx1.6mm. The substrate of the antenna is furnished by using FR4 epoxy material. The top and botttom plane of the presented antenna are constructed using copper material. The antenna achieves the overall −10 dB bandwidth ranging from 2.8 GHz to 11.9 GHz. The net frequency range acquired by the presented three port antenna derives to be 9.1 GHz. The frequency of resonance of the constructed antenna is 6.5 GHz with a return loss of −21.03 dB. The crest gain of the constructed antenna is 1.33 dBi at the crest gain frequency of 11.9 GHz. The overall gain of the antenna at the frequency of resonance is −1.6 dBi. The efficiency of radiation of the antenna is 90.55%. The antenna is best suitable to be used in mobile communications as well as in the miniaturized devices in the unlicensed frequency range.
{"title":"A Compact Three Port Circular MIMO Antenna For Unlicensed UWB Frequency Range Applications","authors":"Jai Mangal","doi":"10.1109/CAPS52117.2021.9730661","DOIUrl":"https://doi.org/10.1109/CAPS52117.2021.9730661","url":null,"abstract":"This paper exhibits the designing methodology of a compact three-port circular antenna for unlicensed ultra-wideband frequency range applications. The attributes of the projected antenna are 24mmx24mmx1.6mm. The substrate of the antenna is furnished by using FR4 epoxy material. The top and botttom plane of the presented antenna are constructed using copper material. The antenna achieves the overall −10 dB bandwidth ranging from 2.8 GHz to 11.9 GHz. The net frequency range acquired by the presented three port antenna derives to be 9.1 GHz. The frequency of resonance of the constructed antenna is 6.5 GHz with a return loss of −21.03 dB. The crest gain of the constructed antenna is 1.33 dBi at the crest gain frequency of 11.9 GHz. The overall gain of the antenna at the frequency of resonance is −1.6 dBi. The efficiency of radiation of the antenna is 90.55%. The antenna is best suitable to be used in mobile communications as well as in the miniaturized devices in the unlicensed frequency range.","PeriodicalId":445427,"journal":{"name":"2021 International Conference on Control, Automation, Power and Signal Processing (CAPS)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129796253","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 : 2021-12-10DOI: 10.1109/CAPS52117.2021.9730675
Ayushi Gupta, K. Seethalekshmi
The occurrence of transient events in AC microgrid creates disturbances in steady-state characteristics of bus voltage and current waveforms. These transient events need to be characterized by some feature vector set. In this paper, an event identification technique has been proposed by deriving features using continuous wavelet transform with teager energy operator to identify whether the transient event is a fault or switching event. The key characteristic of the teager operator is that it tracks the instantaneous energy of the signal as it requires only three samples for computation of energy at each time instant. Hence disturbances during transient events get reflected in teager energy function and as a result it gives sharper spikes in its consecutive value at event inception time. To verify the efficacy of the proposed technique extensive simulation has been carried out at MATLAB/Simulink platform to generate transient events including, shunt faults, load switching, distribution generator switching, grid disconnection.
{"title":"Application of Teager Energy Operator for Identification of Transient Events in AC Microgrid","authors":"Ayushi Gupta, K. Seethalekshmi","doi":"10.1109/CAPS52117.2021.9730675","DOIUrl":"https://doi.org/10.1109/CAPS52117.2021.9730675","url":null,"abstract":"The occurrence of transient events in AC microgrid creates disturbances in steady-state characteristics of bus voltage and current waveforms. These transient events need to be characterized by some feature vector set. In this paper, an event identification technique has been proposed by deriving features using continuous wavelet transform with teager energy operator to identify whether the transient event is a fault or switching event. The key characteristic of the teager operator is that it tracks the instantaneous energy of the signal as it requires only three samples for computation of energy at each time instant. Hence disturbances during transient events get reflected in teager energy function and as a result it gives sharper spikes in its consecutive value at event inception time. To verify the efficacy of the proposed technique extensive simulation has been carried out at MATLAB/Simulink platform to generate transient events including, shunt faults, load switching, distribution generator switching, grid disconnection.","PeriodicalId":445427,"journal":{"name":"2021 International Conference on Control, Automation, Power and Signal Processing (CAPS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124432755","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：