Pub Date : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569880
G. Savini, A. Shitvov, P. Hargrave, C. Tucker, I. Walker, P. Ade, Jin Zhang, G. Pisano, J. Charlton
We report on ongoing technology development activities in the build and testing of a refractive telescope composed of metamaterial Gradient Index (GrIn) lenses based on photolithographic meshes. This concept is tailored for Earth Observation, and more precisely limb-scanning in the sub- THz bands addressing emission lines between 50 and 190 GHz. A single GrIn lens design which includes in-built anti-reflection coating layers, allows us to produce sufficient refraction to allow an optical design of a set of compound lenses to create the first THz range telescope fully composed of metamaterials. First lens prototypes have been built and tested spectrally and spatially and compared to analytical models showing good agreement. Prediction of telescope performance is discussed as well as future developments.
{"title":"MetaTel: Ongoing work on a meta-material sub-THz telescope for Earth observing","authors":"G. Savini, A. Shitvov, P. Hargrave, C. Tucker, I. Walker, P. Ade, Jin Zhang, G. Pisano, J. Charlton","doi":"10.1109/ucmmt53364.2021.9569880","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569880","url":null,"abstract":"We report on ongoing technology development activities in the build and testing of a refractive telescope composed of metamaterial Gradient Index (GrIn) lenses based on photolithographic meshes. This concept is tailored for Earth Observation, and more precisely limb-scanning in the sub- THz bands addressing emission lines between 50 and 190 GHz. A single GrIn lens design which includes in-built anti-reflection coating layers, allows us to produce sufficient refraction to allow an optical design of a set of compound lenses to create the first THz range telescope fully composed of metamaterials. First lens prototypes have been built and tested spectrally and spatially and compared to analytical models showing good agreement. Prediction of telescope performance is discussed as well as future developments.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131167680","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569910
D. Prakash, Marcos Martínez Argudo, D. W. van der Weide, F. Cavallo
Self-assembly of metal nanomembranes is presented as a viable avenue to fabricate helical slow-wave structures for millimeter-through- THz traveling wave tube amplifiers. The work coordinates three-dimensional simulations of cold helices and one-dimensional models of beam-wave interaction to determine a useful range of design parameters for the slow-wave structures. These parameters include diameter and pitch. Based on the simulation results, we fabricate prototype helices with microscale diameter and pitch. The nanomembrane stiffness and the built-in stress control the geometry of the helices.
{"title":"Design and Fabrication of Self-Assembled Metal Helices for Millimeter-through- THz Traveling Wave Tube Amplifiers","authors":"D. Prakash, Marcos Martínez Argudo, D. W. van der Weide, F. Cavallo","doi":"10.1109/ucmmt53364.2021.9569910","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569910","url":null,"abstract":"Self-assembly of metal nanomembranes is presented as a viable avenue to fabricate helical slow-wave structures for millimeter-through- THz traveling wave tube amplifiers. The work coordinates three-dimensional simulations of cold helices and one-dimensional models of beam-wave interaction to determine a useful range of design parameters for the slow-wave structures. These parameters include diameter and pitch. Based on the simulation results, we fabricate prototype helices with microscale diameter and pitch. The nanomembrane stiffness and the built-in stress control the geometry of the helices.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121481656","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569913
Jiaming Hao, Ningning Yan, Yu Luo, Kaixue Ma
A high gain differential-feed stacked-patch antenna based on substrate integrated suspended line (SISL) is proposed in this paper. The antenna consists of five substrate layers with two internal air cavities. By etching slots on the driven patch and adding the stacked patch, the simulation results of the antenna can cover the operating band of 26.22-30.14 GHz. The realized gain of the operating band is within 10.76-12.52 dBi. The cross-polarization is less than −45 dBi, and the antenna efficiency is higher than 82 %.
{"title":"A High Gain Differential-Feed Stacked-Patch Antenna Based on SISL for 5G Millimeter-Wave Applications","authors":"Jiaming Hao, Ningning Yan, Yu Luo, Kaixue Ma","doi":"10.1109/ucmmt53364.2021.9569913","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569913","url":null,"abstract":"A high gain differential-feed stacked-patch antenna based on substrate integrated suspended line (SISL) is proposed in this paper. The antenna consists of five substrate layers with two internal air cavities. By etching slots on the driven patch and adding the stacked patch, the simulation results of the antenna can cover the operating band of 26.22-30.14 GHz. The realized gain of the operating band is within 10.76-12.52 dBi. The cross-polarization is less than −45 dBi, and the antenna efficiency is higher than 82 %.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124535717","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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