Abdoalbaset Abohmra, Fizzah Jilani, H. Abbas, A. Alomainy, M. Ur-Rehman, M. Imran, Q. Abbasi
{"title":"Flexible and Wearable Graphene-based Terahertz Antenna for Body-Centric Applications","authors":"Abdoalbaset Abohmra, Fizzah Jilani, H. Abbas, A. Alomainy, M. Ur-Rehman, M. Imran, Q. Abbasi","doi":"10.1109/IWMTS.2019.8823687","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823687","url":null,"abstract":"This paper presents a graphene-based wearable antenna operating in the terahertz frequency range. Graphene with its highly attractive electronic properties, and modern manufacturing techniques can yield antennas that are not only flexible but efficient and low-profile, suited for terahertz applications. The graphene antenna investigated here has a resonant frequency of 0.647 THz. The performance of the antenna is evaluated on-body and in free space using three layers of human skin. Simulated results show that the proposed antenna has a bandwidth of 20 GHz and offers a radiation efficiency of 96% in free space and 50% on the body, with respective gains of 7.8 dB and 7dB. The small and flexible structure of the antenna along with excellent impedance matching, high bandwidth, and gain, and good efficiency makes it an appropriate candidate to shortrange wireless communication in the vicinity of the human body.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"6 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130557545","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}
A. Gerling, Lennart Becke, S. Tonder, M. Hofmann, J. Balzer, C. Brenner
{"title":"Golomb Ruler Based Discrete Frequency Multimodal Continuous Wave THz Spectroscopy System","authors":"A. Gerling, Lennart Becke, S. Tonder, M. Hofmann, J. Balzer, C. Brenner","doi":"10.1109/IWMTS.2019.8823651","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823651","url":null,"abstract":"Photonic Terahertz systems covering a broad frequency range are a versatile tool for non-destructive testing and thickness determination. The advantage of these systems to measure amplitude and phase is usually accompanied by a certain complexity of the laser source or the THz parts of the setup. A costeffective THz system which enables a fast scan over a broad frequency range would be beneficial for many applications in the THz regime. We build a system with standard telecommunication components to accomplish a frequency scan on discrete frequencies over a broad frequency range, which is usually not feasible with non-tunable monolithic diode lasers. This paper describes the main considerations for this setup and shows a proof of principle operation, as well as the requirements for upscaling the system to wider frequencies ranges and more emission lines. It is shown that with 5 diode lasers we were able to generate 10 discrete emission lines in the frequency range from 50GHz to 1170GHz. The system has the potential to accomplish high scanning speeds with no tunable elements.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131723558","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}
Yamen Zantah, F. Sheikh, A. A. Abbas, Mai Alissa, T. Kaiser
{"title":"Channel Measurements in Lecture Room Environment at 300 GHz","authors":"Yamen Zantah, F. Sheikh, A. A. Abbas, Mai Alissa, T. Kaiser","doi":"10.1109/IWMTS.2019.8823666","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823666","url":null,"abstract":"Channel measurements across 300 GHz to 310 GHz spectrum are performed to realize the ultra-broadband wireless communication channel behaviour for various channel configurations in lecture room environment. At terahertz (THz) frequencies, it is believed that high directional antenna based line-of-sight (LoS) communication possibly achieves terabitper-second (Tbps) links. Thereupon, the VNA-based channel measurements are performed using 26 dBi horn antennas at both the transmitter (TX) and receiver (RX) sides for retrieving the channel parameters (i.e., path loss exponent, shadowing factor) to derive the single-slope path loss model in LoS scenario for distances up to 5 m. Moreover, the results are also evaluated with waveguide antenna (open) for horn-open, and open-open configurations to estimate the propagation losses for different antenna directivities. So far, the results from such a long-distance channel measurement campaign are not recorded yet.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"2677 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130809533","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}