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2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)最新文献

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Performance measurements of mode-converting corrugated horns 模式转换波形角的性能测量
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-13 DOI: 10.1109/UCMMT.2017.8068469
C. Donaldson, P. Mcelhinney, Liang Zhang, A. Cross, Wenlong He
{"title":"Performance measurements of mode-converting corrugated horns","authors":"C. Donaldson, P. Mcelhinney, Liang Zhang, A. Cross, Wenlong He","doi":"10.1109/UCMMT.2017.8068469","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068469","url":null,"abstract":"This paper presents the design, simulation and measurement of two mode converting corrugated horns for application as the output launcher for a gyro-amplifier. Operating over the 90 to 100 GHz frequency range the horns act to convert the TE11 mode to the Gaussian-like HE11 mode. The difference in the horns is one was made initially to meet a more moderate Gaussian content specification while the other was improved to meet stricter criteria on Guassian content as-well-as being vacuum tight and compatible with integration with a broadband multi-layer vacuum window. The results are presented and show that in both cases the measured results agree well with simulated values and ultimately the second horn was demonstrated to be a good candidate to be tested on a gyrotron amplifier.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133585457","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}
引用次数: 0
Lagrangian large signal model for double corrugated waveguides 双波纹波导的拉格朗日大信号模型
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-25 DOI: 10.1109/UCMMT.2017.8068487
Robert Waring, C. Paoloni
{"title":"Lagrangian large signal model for double corrugated waveguides","authors":"Robert Waring, C. Paoloni","doi":"10.1109/UCMMT.2017.8068487","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068487","url":null,"abstract":"A procedure for converting a 1D Lagrangian code for helical waveguide traveling wave tubes to a code for double corrugated waveguide traveling wave tubes is presented, as a way to expedite the design process for high power, high bandwidth, affordable double corrugated waveguide TWTs for amplification in the millimeter wave regime, to complement the established 3D particle in cell simulators such as CST and MAGIC3D","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131625744","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}
引用次数: 1
Cold-test analysis of H-plane and E-plane loaded rectangular slow-wave structure h面和e面加载矩形慢波结构的冷试验分析
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-11 DOI: 10.1109/UCMMT.2017.8068502
L. R. Billa, M. Akram, Xuyuan Chen, Xiang Li, Xuejiao Huang, C. Paoloni
{"title":"Cold-test analysis of H-plane and E-plane loaded rectangular slow-wave structure","authors":"L. R. Billa, M. Akram, Xuyuan Chen, Xiang Li, Xuejiao Huang, C. Paoloni","doi":"10.1109/UCMMT.2017.8068502","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068502","url":null,"abstract":"For travelling-wave tube in millimeter and submillimeter wave frequency bands, an H-plane and E-plane loaded rectangular waveguide is demonstrated as slow-wave structure. The H-plane and E-plane loaded slow-wave structure is designed at W-band for fast verification of the design concept. The cold-test parameters are compared with measurement results.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128317059","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}
引用次数: 0
Modeling of high gain and μW level power consumption resonant tunneling diode based amplifiers 高增益和μW级功耗谐振隧道二极管放大器的建模
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-11 DOI: 10.1109/UCMMT.2017.8068351
S. Muttlak, O. Abdulwahid, J. Sexton, M. Missous
{"title":"Modeling of high gain and μW level power consumption resonant tunneling diode based amplifiers","authors":"S. Muttlak, O. Abdulwahid, J. Sexton, M. Missous","doi":"10.1109/UCMMT.2017.8068351","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068351","url":null,"abstract":"Modeling and theoretically analyzing of a novel K-band reflection based amplifier was performed utilizing the unique negative differential resistance (NDR) feature of an InGaAs/AlAs RTD. A 2.4 μm2 mesa area device was fabricated and measured and on-wafer probe S-parameter measurements up to 40 GHz were carried out. Verification of the diode's equivalent circuit was experimentally validated and then employed to realize a K-band reflection based amplifier. The model was built in advanced design system software including a lumped element branch coupler with two active loads RTDs. Due to constructively combining the in-phase electromagnetic waves at the amplifier's output port, a high gain of 32 dB was achieved at 25.3 GHz while maintaining a very low DC power consumption of 100 μW. This corresponds to a record figure of merit of 320dB/mW to date, validating the excellent performance of the amplifier.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128309097","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}
引用次数: 1
2nd Subharmonic mixer based asymmetric spacer tunnel diode (ASPAT) 基于亚谐波混频器的非对称间隔隧道二极管(ASPAT)
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-11 DOI: 10.1109/UCMMT.2017.8068352
O. Abdulwahid, S. Muttlak, J. Sexton, M. Missous, K. Ian, M. Kelly
{"title":"2nd Subharmonic mixer based asymmetric spacer tunnel diode (ASPAT)","authors":"O. Abdulwahid, S. Muttlak, J. Sexton, M. Missous, K. Ian, M. Kelly","doi":"10.1109/UCMMT.2017.8068352","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068352","url":null,"abstract":"The electrical characterization of two asymmetric spacer layer tunnel diode samples (denoted XMBE#326 and XMBE#304) with mesa size of 16 μm2 have been undertaken to fully extract their extrinsic and intrinsic components. All measured and modelled data are in excellent agreements. Second Subharmonic mixers working at 35 GHz local oscillator signal were designed using the two samples. The minimum conversion loss was 8.5 dB at 0 dBm local oscillator power. Integration of small devices with thinner barrier width would further improve the circuit performances.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121428868","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}
引用次数: 1
Modelling of millimeter wave resonant tunnelling diode based oscillators 基于毫米波谐振隧穿二极管的振荡器建模
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-11 DOI: 10.1109/UCMMT.2017.8068350
S. Muttlak, J. Sexton, M. Missous
{"title":"Modelling of millimeter wave resonant tunnelling diode based oscillators","authors":"S. Muttlak, J. Sexton, M. Missous","doi":"10.1109/UCMMT.2017.8068350","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068350","url":null,"abstract":"Physical and electromagnetic modelling of double barriers InGaAs/AlAs resonant tunneling diode has been carried out using 9 μm2 mesa devices with a peak current density of 1.2 mA/μm2 integrated with a coplanar waveguide resonator. A 100 GHz oscillator was realized and achieved an output power of 100 μW through exploiting the negative differential resistance feature of the diode. Validation of the diode's equivalent circuit model was experimentally verified using on-wafer S-parameter measurements up to 40 GHz. The circuit modelling was performed using advanced design system software. To ensure practical circuit's performance, all parasitic elements associated with the passive components were taken into account. The influence of the stabilizing resistance on the extracted power was also investigated.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"383 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133363882","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}
引用次数: 1
Opticalliy transparent metamaterial for broadband millimeter wave absorption 用于宽带毫米波吸收的光学透明超材料
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-01 DOI: 10.1109/UCMMT.2017.8068475
Cheng Zhang, Q. Cheng
{"title":"Opticalliy transparent metamaterial for broadband millimeter wave absorption","authors":"Cheng Zhang, Q. Cheng","doi":"10.1109/UCMMT.2017.8068475","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068475","url":null,"abstract":"Metamaterial absorber (MMA) has been widely used in many fields like stealth and electromagnetic shielding. However the optically opaque property of the MMA hinders them from electronic applications in some scenarios demanding large light transmittance and high microwave absorptivity simultaneously. Here we present a novel metamaterial for simultaneously optical transparency and millimeter wave absorption in broadband, keeping excellent absorption performance in a wide angle range from 0° to 60° both for TE and TM waves. The proposed metamaterial absorber is made of ring-shaped elements. By properly tailoring the geometric parameters of the proposed structure and the surface resistance of the indium tin oxide (ITO) film, we can achieve the optimized absorptivity that is greater than 90% from 28.1 to 42.8 GHz and excellent optical transmittance by use of ITO film with moderate surface resistance, implying that the optical properties of the metamaterial are hardly affected by the periodic meta-atoms. In addition, the polymethyl methacrylate (PMMA) as the substrate has higher optical transmittance than traditional silica glass also contributes greatly to enhance the optical transmittance of the proposed structure. Numerical simulations demonstrate the good performance of the proposed metamaterial consistent to the theoretical analysis, thereby opening an avenue for a number of applications such as the electromagnetic shielding, information security and anti-electromagnetic interference (EMI) et al.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124405003","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}
引用次数: 2
Preliminary design of a THz EIO based on the pseudospark-sourced sheet electron beam 基于伪火花源片状电子束的太赫兹激振器初步设计
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-01 DOI: 10.1109/UCMMT.2017.8068526
R. Peng, Che Xu, Yong Yin, Liangjie Bi, Z. Chang, F. Zeng, Bin Wang, L. Meng
{"title":"Preliminary design of a THz EIO based on the pseudospark-sourced sheet electron beam","authors":"R. Peng, Che Xu, Yong Yin, Liangjie Bi, Z. Chang, F. Zeng, Bin Wang, L. Meng","doi":"10.1109/UCMMT.2017.8068526","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068526","url":null,"abstract":"Extended interaction oscillator (EIO) operated in the terahertz range puts greater demand on current density and brightness of electron beam. The pseudospark-sourced (PS) electron beam is an attractive candidate to drive such high frequency EIOs. The study of a THz EIO driven by a PS sheet electron beam is presented. This enables the advantages of a interaction circuit combined with the merits of a PS sheet electron beam, including large beam cross section, high current density and the fact that a PS electron beam does not require the use of an external focusing magnetic field. This paper presents the latest results that demonstrate the design and optimization of THz EIO driven by a 210 mA (500 A/cm2) PS-sourced electron beam. A peak power over 0.78 kW at 0.388 THz was achieved using a pseudospark-sourced sheet electron beam.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125883376","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}
引用次数: 1
Dual polarization THz time domain spectroscopy system 双极化太赫兹时域光谱系统
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-01 DOI: 10.1109/UCMMT.2017.8068519
Y. Yu, Guozhong Zhao, G. Savini, Shuai Li
{"title":"Dual polarization THz time domain spectroscopy system","authors":"Y. Yu, Guozhong Zhao, G. Savini, Shuai Li","doi":"10.1109/UCMMT.2017.8068519","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068519","url":null,"abstract":"In many THz Time Domain Spectroscopy configurations, the separate acquisition of background and sample measurements have significant impact on data quality due to the need to perform subsequent measurements as well as the change in beam coupling geometry due to the removal of the sample in the reference measurement. In this short paper, we report on the design and build of a dual-polarization TDS system to perform synchronous background/sample measurements. This is achieved through the splitting of the PCA-generated THz beam with a THz polarizer to obtain two orthogonal polarized beams which are balanced and modulate the indices of two separate crystals on which the probe beam (also split) is reflected off before being detected. The two branches of the system show good similarity, and can be used to perform background and sample measurements synchronously, thus not being affected by changes in temperature and humidity, as well as small fluctuations in source power. Small differences in detector optical efficiency can be calibrated out at the start of a measurement session.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123789662","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}
引用次数: 0
SU-8 micromachined cross-coupled waveguide cavity filter for sideband rejection above 300 GHz SU-8微机械交叉耦合波导腔滤波器，用于300ghz以上的边带抑制
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-09-01 DOI: 10.1109/UCMMT.2017.8068464
X. Shang, Hao Yang, Yuvaraj Dhayalan, M. Lancaster, Hui Wang, P. Huggard
{"title":"SU-8 micromachined cross-coupled waveguide cavity filter for sideband rejection above 300 GHz","authors":"X. Shang, Hao Yang, Yuvaraj Dhayalan, M. Lancaster, Hui Wang, P. Huggard","doi":"10.1109/UCMMT.2017.8068464","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068464","url":null,"abstract":"A 300 GHz waveguide filter, designed to block the unwanted upper sideband from reaching a heterodyne mixer, is presented. This WR-3 filter is based on three cross-coupled TE101 resonators. It is designed to have a Chebyshev response, and cross-coupling between first and third resonators provides transmission zeros in the stopband. The filter is fabricated using a multilayered SU-8 micromachining process. The completed filter has a 12 GHz bandwidth with a center frequency of 298.5 GHz: in-band insertion loss is 0.45 dB, with >30 dB rejection of the unwanted sideband. Good agreement between predicted and measured transmissions is obtained.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"230 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116045489","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}
引用次数: 2
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