S. Makhlouf, B. Khani, T. Haddad, M. Steeg, A. Stöhr
{"title":"Endfire Transition from Coplanar Waveguide-to-WR3 Rectangular Waveguide for Monolithic Integration with THz Photodiodes","authors":"S. Makhlouf, B. Khani, T. Haddad, M. Steeg, A. Stöhr","doi":"10.1109/IWMTS.2019.8823686","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823686","url":null,"abstract":"In this paper, an endfire transition from coplanar-torectangular waveguide (CPW-to-WR3) for operation in the WR3band (220-320 GHz) is presented. The transition is designed for providing connectivity between a monolithically integrated InPbased terahertz photodiode (PD) to a WR3 rectangular waveguide. The presented transition is based on a CPW-fed planar dipole antenna designed on InP substrate which placed in the E-plane of the rectangular waveguide. The dipole-based transition converts the direct coupled quasi-TEM CPW mode of the PD output to the $TE_{mathbf{10}}$ mode of the rectangular waveguide. The proposed design provides a simple approach avoiding complex integration and packaging techniques like air bridges, ribbon-bonds, or via holes. Numerical analysis of the designed transition shows a wideband performance with a 3 dB insertion loss (IL) over 88 GHz bandwidth and a 10 dB return loss (RL) over 53 GHz bandwidth within the WR3-band.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"15 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":"122959240","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}