{"id":584,"date":"2021-08-06T09:58:12","date_gmt":"2021-08-06T09:58:12","guid":{"rendered":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/?page_id=584"},"modified":"2021-09-10T15:15:11","modified_gmt":"2021-09-10T15:15:11","slug":"13th-september-2021","status":"publish","type":"page","link":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/13th-september-2021\/","title":{"rendered":"13th September 2021"},"content":{"rendered":"

 <\/p>\n\n\n\n\n\n\n\n\n
UK<\/p>\n
<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n<\/td>\n
China<\/p>\n

 <\/td>\n

\n
PROGRAM FOR MONDAY, SEPTEMBER 13TH<\/span><\/div>\n
\n

(time BST, China)<\/p>\n

\n
08:00-08:10 (15:00 – 15:10)<\/span>
\nSession 1: Opening Ceremony<\/span><\/div>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
 <\/p>\n

 <\/p>\n

8:10<\/p>\n

 <\/p>\n

 <\/p>\n

8.55<\/td>\n

 <\/p>\n

 <\/p>\n

15:10<\/p>\n

 <\/p>\n

 <\/p>\n

15.55<\/td>\n

\n
 <\/p>\n

 <\/p>\n

9.50<\/td>\n

 <\/p>\n

 <\/p>\n

16.50<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/td>\n

\n
10:15<\/td>\n17:15<\/td>\n\n
Yuyuan Fan<\/a>
\n (School of Microelectronics,Tianjin University, China)<\/span><\/div>\n
<\/div>\n
Sheng Xie<\/a>
\n (Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, School of Microelectronics, China)<\/span><\/div>\n
<\/div>\n
Yu Luo<\/a>
\n (Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, School of Microelectronics, China)<\/span><\/div>\n
<\/div>\n
Kaixue Ma<\/a>
\n (Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, School of Microelectronics, China)<\/span><\/div>\n

 <\/p>\n

Gain and Radiation Efficiency Enhance Terahertz On-Chip Antenna Based on 0.13-\u03bcm SiGe BiCMOS<\/b><\/div>\n
PRESENTER:
\nYuyuan Fan<\/a><\/div>\n
\n

ABSTRACT. This paper proposes a 340GHz on-chip antenna with enhanced gain and radiation efficiency. In the proposed on-chip antenna, a rectangle slot loop is etched in the upper wall of a substrate integrated waveguide (SIW). The SIW structure forms a 1\/4 wavelength resonant cavity with the radiator, reflecting electromagnetic waves back to the radiator. Multi-point feeding significantly improves Radiation efficiency. Designed and optimized using a standard 0.13-\u03bcm SiGe BiCMOS process and compared with ordinary patch antenna. The simulation results show that both gain and radiation efficiency are improved, the gain is 5.41dBi, and the radiation efficiency is about 49.7% at 340GHz.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

10:30<\/td>\n17.30<\/td>\n\n
Xue Ren<\/a>
\n (College of Electronics and Information Engineering, Shenzhen University, China)<\/span><\/div>\n
<\/div>\n
Qing-Yi Guo<\/a>
\n (College of Electronics and Information Engineering, Shenzhen University, China<\/span>)<\/span><\/div>\n
<\/div>\n
Shaowei Liao<\/a>
\n (School of Electronic and Information Engineering, South China University of Technology, China)<\/span><\/div>\n
<\/div>\n
Wenlong He<\/a>
\n (College of Electronics and Information Engineering, Shenzhen University, China)<\/span>Quan Xue<\/a>
\n (School of Electronic and Information Engineering, South China University of Technology, China)<\/span><\/div>\n
<\/div>\n
Hang Wong<\/a>
\n (State Key Laboratory of Terahertz and Millimeter Waves, City Univerisity of Hong Kong, China)<\/span><\/div>\n

 <\/p>\n

A Millimeter-Wave Circulary Polarized Antenna for 5G Applications<\/b><\/div>\n
PRESENTER:
\nXue Ren<\/a><\/div>\n
\n

ABSTRACT. A circularly polarized millimeter-wave antenna for 5G applications based on magnetic dipole radiation is presented. The radiation part is mounted on the ground directly, which is based on the magnetic dipole structure. This arrangement contributes to the robustness of the antenna. Surrounding cavity is utilized to improve the radiation performance. Sequentially fed scheme is applied to generate circularly polarized waves. The simulation results show that the designed antenna works well from 26 to 30 GHz. The radiation patters show low cross-polarization of below -45 dB in boresight with the peak gain of about 8 dBic. The axial-ratio is better than 3.15 dB within the beamwidth of 120o. Besides, good consistence of the radiation patterns on orthogonal planes is also observed.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

10:45<\/td>\n17:45<\/td>\n\n
Weihao Qi<\/a>
\n (Shanghai Jiao Tong University, China)<\/span><\/div>\n
<\/div>\n
Xianling Liang<\/a>
\n (Shanghai Jiao Tong University, China)<\/span><\/div>\n
<\/div>\n
Lei Xiang<\/a>
\n (Shanghai Jiao Tong University, China)<\/span><\/div>\n
<\/div>\n
Yanchang Gao<\/a>
\n (Shanghai Jiao Tong University, China)<\/span><\/div>\n

 <\/p>\n

A W-band Broadband Cassegrain Antenna with Polarisation and OAM Multiplexing<\/b><\/div>\n
PRESENTER:
\nWeihao Qi<\/a><\/div>\n
\n

ABSTRACT. A broadband dual-polarisation and three-mode OAM cassegrain antenna in W-band is proposed. The antenna consists of two parts. One is a dual-polarised open-ended square waveguide antenna double-ring antenna array as a feed, which is designed to generate OAM beams with modes of \u00b11 and +2, and the other is a cassegrain reflector, which is designed to converge the OAM beams. The proposed antenna has a 10dB impendance bandwidth beyond 24.9%, gains better than 26.6dBi, side-lobe levels lower than -10.7dB, and cross-polarisation levels lower than -15dB.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n
09:50-11:00 (16:50 – 18:00)<\/span><\/span>
\nSession 3B: Broadband Solid state devices<\/span><\/div>\n

Chair Viktor Krozer \u00a0(Goethe University of Frankfurt, Germany)<\/p>\n\n\n\n\n\n\n
09:50<\/td>\n16:50<\/td>\n\n
Xiaoning Huang<\/a>
\n (Hangzhou Dianzi University, China)<\/span><\/div>\n
<\/div>\n
Jincai Wen<\/a>
\n (Hangzhou Dianzi University, China)<\/span><\/div>\n

 <\/p>\n

Broadband On-Board Impedance Matching Method for Ka-band Amplifier Circuit (Invited)<\/b><\/div>\n
PRESENTER:
\nXiaoning Huang<\/a><\/div>\n
\n

ABSTRACT. In this paper, a method to achieve the broadband on-board impedance matching for Ka-band amplifier circuit based on the trade-off between bandwidth and quality factor (Q-factor) is proposed. As an example, the design procedure of on-board matching networks for low noise amplifier (LNA) is presented in detail. After impedance matching, the simulated small-signal gain S21 of LNA reaches 16.6dB from 36GHz to 44GHz with the maximum S21 of 19.0dB at 36.5GHz. The reflection coefficient S11 and S22 from 36GHz to 44GHz are less than -9.7dB and -11.3dB, respectively.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

10:15<\/td>\n17:15<\/td>\n\n
Guanqin Guo<\/a>
\n (College of Electronics and Information Engineering, Shenzhen University, China)<\/span><\/div>\n
<\/div>\n
Cheng Zhang<\/a>
\n (College of Electronics and Information Engineering, Shenzhen University, China)<\/span><\/div>\n
<\/div>\n
Wenlong He<\/a>
\n (College of Electronics and Information Engineering, Shenzhen University, China)<\/span><\/div>\n
<\/div>\n
Xi Zhu<\/a>
\n (School of Electrical and Data Engineering, FEIT, University of Technology Sydney, Australia)<\/span><\/div>\n

 <\/p>\n

Design of Broadband Low-Noise Amplifier in 45-nm SOI Technology<\/b><\/div>\n
PRESENTER:
\nGuanqin Guo<\/a><\/div>\n
\n

ABSTRACT. This paper presents a 28-38 GHz wideband low- noise amplifier (LNA) with minimum noise figure of 2.8 dB.The amplifier consists of a two-stage cascade design. By using a transformer circuit as its matching network, the LNA achieved a wideband performance. The LNA was designed in 45 nm CMOS SOI technology, achieving a maximum voltage gain of 20 dB and a maximum power gain of 23 dB with a 3dB bandwidth of 28-38 GHz, and a noise figure less than 3.8 dB in the band. At a supply voltage of 1.5V, the DC power consumption was only 20 mW.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

10:30<\/td>\n17:30<\/td>\n\n
Tao Zhang<\/a>
\n(UESTC, China<\/span>)<\/span><\/div>\n
10:45<\/td>\n17:45<\/td>\n\n
Wei Liu<\/a>
\n (Tianjin University, China)<\/span><\/div>\n
<\/div>\n
Feng Feng<\/a>
\n (Tianjin University, China)<\/span><\/div>\n
<\/div>\n
Jianan Zhang<\/a>
\n (Carleton University, Canada)<\/span><\/div>\n
<\/div>\n
Qi-Jun Zhang<\/a>
\n (Carleton University, Canada)<\/span><\/div>\n

 <\/p>\n

Recent Advance in Adjoint EM Sensitivity Analysis for Fast Frequency Sweep<\/b><\/div>\n
PRESENTER:
\nWei Liu<\/a><\/div>\n
\n

ABSTRACT. This paper reviews the recent advance in adjoint electromagnetic (EM) sensitivity analysis for fast frequency sweep. The existing adjoint EM sensitivity analysis methods have to solve large systems of EM equations repetitively for the entire frequency band. We propose a new adjoint EM sensitivity analysis algorithm for the fast frequency sweep using the matrix Pad\u00b4e via Lanczos (MPVL) technique based on the
\nfinite-element method (FEM) to addresses this situation. A large EM matrix is only solved at a single frequency to predict the sensitivity information for all frequencies. The adjoint EM sensitivity analysis using the MPVL technique can obtain the same accuracy as the existing techniques while taking less time.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\n
09:50-11:00 (16:50 – 18:00)<\/span><\/span>
\nSession 3C: Slow wave structures for vacuum electronics devices<\/span><\/div>\n

Chair Jinjun Feng (Beijing Vacuum Electronics Research Institute (BVERI), China)<\/p>\n\n\n\n\n\n\n
09:50<\/td>\n16:50<\/td>\n\n
Divya Prakash<\/a>
\n (University of New Mexico, United States)<\/span><\/div>\n
<\/div>\n
Marcos Martinez Argudo<\/a>
\n (University of Wisconsin-Madison, United States)<\/span><\/div>\n
<\/div>\n
Daniel W. van der Weide<\/a>
\n (University of Wisconsin-Madison, United States)<\/span><\/div>\n
<\/div>\n
Francesca Cavallo<\/a>
\n (University of New Mexico, United States)<\/span><\/div>\n

 <\/p>\n

Design and Fabrication of Self-Assembled Metal Helices for Millimeter-through-THz Traveling Wave Tube Amplifiers (Invited)<\/b><\/div>\n
PRESENTER:
\nFrancesca Cavallo<\/a><\/div>\n
\n

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, prototype helices with microscale diameter and pitch are fabricated. The nanomembrane stiffness and the built-in stress control the geometry of the helices.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

10:15<\/td>\n17:15<\/td>\n\n
Marcos Martinez<\/a>
\n (UW Madison, United States)<\/span><\/div>\n
<\/div>\n
Divya Prakash<\/a>
\n (University of New Mexico, United States)<\/span><\/div>\n
<\/div>\n
Francesca Cavallo<\/a>
\n (University of New Mexico, United States)<\/span><\/div>\n
<\/div>\n
Daniel van der Weide<\/a>
\n (University of Wisconsin-Madison, United States)<\/span><\/div>\n

 <\/p>\n

Modeling of Self-Winding Helices for Sub-Millimeter Traveling Wave Tube Amplifiers<\/b><\/div>\n
PRESENTER:
\nMarcos Martinez<\/a><\/div>\n
\n

ABSTRACT. We present simulations of a travelling wave tube
\namplifier based on a self-winding helix for operation at THz
\nfrequencies. Helix fabrication relies on guided self-assembly
\nof conductive nanomembranes. The structure is modeled and
\nsimulated using CST Studio time domain and Particle in Cell
\nsolvers. The impact of meshing on the simulation results as well
\nas simulation time is evaluated. Electric field distribution as well
\nas gain at 1 THz are calculated for a 0.25 m-thick helix forming
\na 1 mm-long travelling wave tube amplifier.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

10:30<\/td>\n17:30<\/td>\n\n
Roman Torgashov<\/a>
\n (Saratov Branch of Kotel’nikov Institute of Radio-engineering and Electronics, Russia)<\/span><\/div>\n
10:45<\/td>\n17:45<\/td>\n\n
Jeevan M. Rao<\/a>
\n (Lancaster University, UK)<\/span><\/div>\n
<\/div>\n
Rupa Basu<\/a>
\n (Lancaster University, UK)<\/span><\/div>\n
<\/div>\n
Rosa Letizia<\/a>
\n (Lancaster University, UK)<\/span><\/div>\n
<\/div>\n
Claudio Paoloni<\/a>
\n (Lancaster Engineering, UK)<\/span><\/div>\n

 <\/p>\n

Tolerance Analysis of Double Corrugated Waveguide for D-band TWT<\/b><\/div>\n
PRESENTER:
\nRupa Basu<\/a><\/div>\n
\n

ABSTRACT. D-band TWTs (in the 151 – 174.5 GHz band) are the enabling devices for long range links with high capacity at sub-THz frequency. The EPSRC DLINK project aims to produce a front end to provide about 45 Gb\/s for 1 kilometre range in point to point with 99.99% availability in ITU zone K. The design and fabrication of the TWTs is in progress. The short wavelength at D-band needs high precision fabrication and strict tolerances. This paper will discuss the impact of variation of dimensions against the nominal design value of the double corrugated waveguide for a 151 – 161 GHz TWT, highlighting the design parameters that needs higher accuracy.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\n
11:00-12:00 (18:00 – 19:00)<\/span><\/span>
\nSession 4A: Solid state devices<\/span><\/div>\n
\n
\n
\n

Chair Nuno Borges Carvalho (Universidade de Aveiro, Portugal)<\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n\n\n\n
11:00<\/td>\n18:00<\/td>\n\n
\n
Haiyan Lu<\/a>
\n (Southeast university, China)<\/span><\/div>\n

 <\/p>\n

Modeling Techniques for GaN FinFET<\/b><\/div>\n
\n

ABSTRACT. This paper briefly introduces the fabrication of GaN FinFET devices and its DC and microwave characteristics. GaN FinFET exhibits better linearity, higher current density and power density. A large signal equivalent circuit modeling for GaN FinFETs is presented in this paper. The improved Rs and current equation are shown in the paper. The simulation results of DC and S parameter models are compared with the measured ones. The results show that the model has high precision and good convergence and can be used in circuit design.<\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

11:15<\/td>\n18:15<\/td>\n\n
\n
Ming Guan<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n
<\/div>\n
Bo Zhang<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n

 <\/p>\n

A Broadband 3 dB Directional Coupler With Ultra-Low Amplitude Imbalance<\/b><\/div>\n
PRESENTER:
\nMing Guan<\/a><\/div>\n
\n

ABSTRACT. This paper presents a broadband 3 dB directional coupler based on a multi-branch hybrid waveguide. By placing a two-stage stepped waveguide-height discontinuity in the middle of the coupler symmetrically, a controllable ripple is introduced to achieve better overall amplitude imbalance. The simulation results show that over the most of the operating frequency bands from 385 GHz to 481 GHz, the amplitude imbalance is less than 0.037dB. The return loss of the operating frequency band is less than -17 dB and the phase imbalance is better than \u00b1 1.85\u00b0<\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

11:30<\/td>\n18:30<\/td>\n\n
\n
Jinyuan Cui<\/a>
\n (Tianjin University, China)<\/span><\/div>\n
<\/div>\n
Feng Feng<\/a>
\n (Tianjin University, China)<\/span><\/div>\n
<\/div>\n
Zhihao Zhao<\/a>
\n (NXP Semiconductors, Canada<\/span>)<\/span><\/div>\n
<\/div>\n
Wenyuan Liu<\/a>
\n (Shaanxi University of Sci& Tec, China)<\/span><\/div>\n
11:45<\/td>\n18:45<\/td>\n\n
Yang Liu<\/a>
\n(University of Electronic Science and Technology of China, China)<\/span><\/div>\n
Bo Zhang<\/a>
\n(University of Electronic Science and Technology of China, China)<\/span><\/div>\n

 <\/p>\n

The Design of 220GHz Four-way Power Divider Based on E-plane Derectional Waveguide Hybrid<\/b><\/div>\n
PRESENTER:
\nYang Liu<\/a><\/div>\n
\n

ABSTRACT. This paper designs a four-way power divider based on 3dB E-plane waveguide hybrid coupler at center frequency 220GHz.By using bend waveguide cascade the hybrid, the return loss of designed power divider can be better than 21dB over 203GHz -235GHz\uff0cwhile the amplitude imbalance can be less than 0.15dB and relative bandwidth can reach more than 13.6 %. The power divider achieves a good result of equal power distribution and can meet the requirements of terahertz communication and imaging applications.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\n
11:00-12:00 (18:00 – 19:00)<\/span><\/span>
\nSession 4B: Imaging<\/span><\/div>\n

Chiar Giorgio Savini (UCL, UK)<\/p>\n\n\n\n\n\n\n
11:00<\/td>\n18:00<\/td>\n\n
Ashlesha Jagdale<\/a>
\n (BITS, Goa, India)<\/span><\/div>\n
<\/div>\n
Nirmala Devi<\/a>
\n (CSIR, India)<\/span><\/div>\n
<\/div>\n
A Mercy Latha<\/a>
\n (CSIR-CEERI, India)<\/span><\/div>\n

 <\/p>\n

Advanced Image Processing for Rapid Threat Object Identification in Terahertz Images<\/b><\/div>\n
PRESENTER:
\nAshlesha Jagdale<\/a><\/div>\n
\n

ABSTRACT. With an increasing trend of anti-social activities and terrorist attacks, there is a persistent demand for rapid and effective security screening systems, particularly in crowded public places such as in metros stations, airports, etc. Nowadays, terahertz (THz) based rapid scanners and cameras are employed as an alternative to the traditional X-ray baggage scanners due to the ability of THz waves to penetrate most non-metallic materials and low ionizing radiation. Although such rapid THz line scanners and cameras are commercially available, the quality of the THz images acquired with these devices is very poor. This requires advanced image processing techniques to be employed for rapid threat object detection and identification. In this work, a sequence of image processing steps have been adopted which includes (i) Weiner filtering, (ii) Lucy-Richardson deconvolution with the appropriate point-spread function, (iii) histogram based global thresholding of the image. This sequence of image processing operations have resulted in refined images thereby enabling in rapid threat object detection and identification. This approach may be utilized as a preprocessing step before implementing sophisticated neural networks for automatic threat object detection and classification.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

11:15<\/td>\n18:15<\/td>\n\n
Jin Li<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n
<\/div>\n
Qianrong Ye<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n
<\/div>\n
Junchuan Guo<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n
<\/div>\n
Rui Min<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n
<\/div>\n
Yuliang Li<\/a>
\n (University of Electronic Science and Technology of China, China)<\/span><\/div>\n

 <\/p>\n

Motion Compensation Algorithm Based on Entropy-Minimization for Terahertz SAR<\/b><\/div>\n
PRESENTER:
\nJin Li<\/a><\/div>\n
\n

ABSTRACT. Compared with microwave synthetic aperture radar (SAR), terahertz SAR (THz SAR) is easier to achieve ultrahigh-resolution image but more difficult to compensate motion errors. For the reason that there are more motion errors to be considered in THz SAR, in addition to the low-frequency phase errors (LPEs) in conventional microwave SAR, the high-frequency phase errors (HPEs) caused by tiny high-frequency vibration of the platform must be handled prudently. To compensate all kind of motion errors simultaneously, this paper starts from the defocused image, proposes a non-parametric compensation algorithm based on entropy-minimization, which does not make any hypothesis of the phase error. Newton method is used to implement optimal search of phase error. Finally, the effectiveness of the proposed algorithm is demonstrated by simulation results.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

11:30<\/td>\n18:30<\/td>\n\n
Lei Fan<\/a>
\n (the College of Electronic Science, National University of Defense Technology, China)<\/span><\/div>\n
<\/div>\n
Qi Yang<\/a>
\n (the College of Electronic Science, National University of Defense Technology, China)<\/span><\/div>\n
<\/div>\n
Bin Deng<\/a>
\n (the College of Electronic Science, National University of Defense Technology, China)<\/span><\/div>\n
<\/div>\n
Yang Zeng<\/a>
\n (the College of Electronic Science, National University of Defense Technology, China)<\/span><\/div>\n
<\/div>\n
Wang Hongqiang<\/a>
\n (the College of Electronic Science, National University of Defense Technology, China)<\/span><\/div>\n

 <\/p>\n

Concealed Object Detection For Active Millimeter Wave Imaging Based CGAN Data Augmentation<\/b><\/div>\n
PRESENTER:
\nLei Fan<\/a><\/div>\n
\n

ABSTRACT. Considering under-controlled privacy issues and no health hazards, the active millimeter wave (AMMW) imaging technique has been widely applied in security industries. The ultimate goal is to recognize and detect the concealed object accurately and fleetly, which requires complete and representative datasets. In this paper, concealed object detection for AMMW is proposed. The conditional generative adversarial network (CGAN) is utilized for data augmentation, which enhances the image feature. Data feasibility for detection is validated by the object detection network. Experimental results demonstrate that the proposed method can improve the recognition accuracy effectively and provide a solution for training with small sample datasets.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

11:45<\/td>\n18:45<\/td>\n\n
Siyuan Zhou<\/a>
\n (Beijing Institute of Technology, China)<\/span><\/div>\n
<\/div>\n
Hongyu Xu<\/a>
\n (China North Industries Corporation, China)<\/span><\/div>\n
<\/div>\n
Xianchen Zhang<\/a>
\n (Beijing Institute of Technology, China)<\/span><\/div>\n
<\/div>\n
Weidong Hu<\/a>
\n (Beijing Institute of Technology, China)<\/span><\/div>\n

 <\/p>\n

Lunar surface radiation brightness temperature simulation for FY-4 lunar calibration<\/b><\/div>\n
PRESENTER:
\nSiyuan Zhou<\/a><\/div>\n
\n

ABSTRACT. The Feng Yun-4 satellite (FY-4) is a new generation of meteorological satellite developed independently by China, which will greatly improve the capability of meteorological monitoring and forecasting. Millimeter and Sub-millimeter Sounding\/Imager (MMSI) is an important payload it carries. To carry out the lunar calibration of FY-4, the inversion of the main metallic substance content of the lunar surface based on the data from the U.S. Clementine satellite is used to obtain the dielectric constant distribution. Then the lunar surface brightness temperature (TB) radiation model is established by combining the basic lunar regolith parameters. The accuracy and reliability of the method are verified using Chang’e-2(CE-2) MRM data. Finally, the radiation TB distribution of FY-4 MMSI terahertz band in the lunar equatorial region is simulated, which can provide experience for future geostationary satellite satellite-based sounder lunar calibration work.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\n
11:00-12:00 (18:00 – 19:00)<\/span><\/span>
\nSession 4C: Millimetre-wave Traveling Wave Tubes<\/span><\/div>\n

Chair Yubin Gong (UESTC, China)<\/p>\n\n\n\n\n\n\n
11:00<\/td>\n18:00<\/td>\n\n
Liang Zhang<\/a>
\n (University of Strathclyde, UK)<\/span><\/div>\n
<\/div>\n
Alan Phelps<\/a>
\n (University of Strathclyde, UK)<\/span><\/div>\n
<\/div>\n
Kevin Ronald<\/a>
\n (University of Strathclyde, UK)<\/span><\/div>\n
<\/div>\n
Adrian Cross<\/a>
\n (University of Strathclyde, UK)<\/span><\/div>\n
11:15<\/td>\n18:15<\/td>\n\n
Andrey Ploskikh<\/a>
\n (Saratov State University, Russia)<\/span><\/div>\n
<\/div>\n
Vladimir Titov<\/a>
\n (Saratov State University, Russia)<\/span><\/div>\n
<\/div>\n
Nikita Ryskin<\/a>
\n (Saratov Branch, Kotelnikov Institute of Radio Engineering and Electronics RAS, Russia)<\/span><\/div>\n

 <\/p>\n

Design Study of a Sub-THz Traveling Wave Tube With a Converging Sheet Electron Beam<\/b><\/div>\n
PRESENTER:
\nNikita Ryskin<\/a><\/div>\n
\n

ABSTRACT. The results of simulation study aimed at development of a sub-THz traveling-wave tube (TWT) with a converged sheet electron beam are presented. The dual grating staggered slow-wave structure with a 100-um-height beam tunnel is designed and its cold electromagnetic parameters are calculated. The results of 3D PIC-simulation of the gain and output power in small-signal and large-signal operating regimes are presented. We compare the characteristics of the TWT driven with the converging sheet beam produced by an electron gun with shielded cathode and with a rectilinear beam produced by a gun immersed in the uniform magnetic field.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

11:30<\/td>\n18:30<\/td>\n\n
Zheng Wen<\/a>
\n (Aerospace Information Research Institute, Chinese Academy Of Sciences, China)<\/span><\/div>\n
<\/div>\n
Jirun Luo<\/a>
\n (Aerospace Information Research Institute, Chinese Academy Of Sciences, China)<\/span><\/div>\n

 <\/p>\n

Beam-Wave Resynchronization Method of the Non-Periodic Slow-Wave Structure for TWTs<\/b><\/div>\n
PRESENTER:
\nZheng Wen<\/a><\/div>\n
\n

ABSTRACT. A beam-wave resynchronization method of the non-periodic slow-wave structure for TWTs is proposed. The condition of the beam-wave interaction is derived, analyzed and discussed. The non-periodic folded-waveguide SWS (NP FW-SWS) is introduced as an application example. The simulated results show that when the input signal is 0.4 W, the output power of the NP FW-TWT can be improved from 199 W to 233 W, and the corresponding electron efficiency can be increased from 27.6% to 32.4% accordingly. For the NP FW-TWTs, the particle velocity and phase velocity at 94 GHz along the number of elements are also given and compared, which indicates that the beam-wave resynchronization method is beneficial for efficiency enhancement.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n

11:45<\/td>\n18:45<\/td>\n\n
Juan Socuellamos<\/a>
\n (Lancaster University, UK)<\/span><\/div>\n
<\/div>\n
Rosa Letizia<\/a>
\n (Lancaster University, UK)<\/span><\/div>\n
<\/div>\n
Roberto Dionisio<\/a>
\n (European Space Agency (ESA), Netherlands)<\/span><\/div>\n
<\/div>\n
Claudio Paoloni<\/a>
\n (Lancaster Engineering, UK)<\/span><\/div>\n

 <\/p>\n

Analysis of the Bottom Metal\/Dielectric Supporting Plane in Meander Line Slow Wave Structures for Millimetre Wave Traveling Wave Tubes<\/b><\/div>\n
PRESENTER:
\nJuan Socuellamos<\/a><\/div>\n
\n

ABSTRACT. Meander lines have been lately studied as slow wave structures (SWSs) for millimetre-wave traveling wave tubes (TWTs) given their numerous benefits such as low beam voltage, high interaction impedance and straightforward manufacture. They are seen as a very promising candidate for a new generation of low-cost TWTs. The efforts are now focused on finding novel meander line configurations that could improve the overall performance of the TWT. This paper analyses the effect of the material underneath the meander line substrate and presents different alternatives to enhance the interaction impedance.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

 <\/p>\n

12:00-13:00 (19:00 – 20:00)<\/span><\/span>
\nExtra Open Session for candidates to the Best Student Paper award<\/span><\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
\n
Patrons<\/span>
\nSilver<\/span><\/span><\/div>\n
<\/div>\n
\u00a0<\/span><\/strong>
\n<\/a><\/span><\/strong><\/p>\n\n\n\n\n
\"\"<\/a><\/span><\/strong><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n
\"\"<\/a><\/span><\/strong><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
<\/div>\n

\n<\/span><\/strong>\u00a0\u00a0<\/span><\/p>\n

Bronze<\/span><\/span><\/p>\n\n\n\n
\"\"<\/a><\/span><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n<\/div>\n<\/div>\n

<\/div>\n
<\/div>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"

  UK China   PROGRAM FOR MONDAY, SEPTEMBER 13TH (time BST, China) 08:00-08:10 (15:00 – 15:10) Session 1: Opening Ceremony     8:10     8.55     15:10     15.55 08:10-09:40 (15:10 – 16:40) Session 2: Plenary 1 Chair Rosa Letizia (Lancaster University, UK) Wei Hong (Southeast University, Nanjing, China) Millimeter Wave ICs…<\/p>\n","protected":false},"author":663,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-584","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/pages\/584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/users\/663"}],"replies":[{"embeddable":true,"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/comments?post=584"}],"version-history":[{"count":30,"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/pages\/584\/revisions"}],"predecessor-version":[{"id":794,"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/pages\/584\/revisions\/794"}],"wp:attachment":[{"href":"http:\/\/wp.lancs.ac.uk\/ucmmt2021\/wp-json\/wp\/v2\/media?parent=584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}