2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)最新文献

{"title":"Design of a Millimeter-Wave Frequency-Scanning Slot Array Antenna in SIW Technology","authors":"Farbod Molaee-Ghaleh, K. Mohammadpour‐Aghdam","doi":"10.1109/MMWATT.2018.8661236","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661236","url":null,"abstract":"In this paper, design and implementation of a frequency-scanning slot array antenna in the 28 to 32 GHz frequencies, has been presented. The feeding network of the proposed array is based on a meander Surface Integrated Waveguide (SIW) which is fabricated by low-cost Printed Circuit Board (PCB) technology. The antenna has a narrow fan beam with a beamwidth of 10 degrees in azimuth, realized gain of 10 dBi and Side Lobe Level (SLL) of better than −10 dB. The antenna is able to cover the scan area of 90 degrees by frequency sweep with a rate of 10 degree/400 MHz.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115769741","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}

{"title":"Novel Planar Wideband Antenna Integrated with Compact Flat Reflector for Millimeter-wave Communications","authors":"M. Faridani, M. Yagoub","doi":"10.1109/MMWATT.2018.8661223","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661223","url":null,"abstract":"This paper introduces a novel planar millimeter wave reflector antenna designed for wireless communication systems. The reflector, with two dielectric and conductive parts, is integrated with a microstrip antenna thus, the compact reflector antenna with a thickness of ≈ 2 mm is developed. The proposed antenna operates in a wide impedance bandwidth of about 121.2 % from 21.7 GHz to 88.4 GHz and presents a maximum gain of 11.8 dB at 67 GHz. Meanwhile, it has a total radiation efficiency greater than 89 % in the whole 60 GHz frequency band.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657766","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}

{"title":"Rat-Race Power Divider/Combiner for 5G Application Using Substrate Integrated Gap Waveguide","authors":"Kambiz Eslami, K. Afrooz","doi":"10.1109/MMWATT.2018.8661238","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661238","url":null,"abstract":"In this paper, a rat-race coupler based on Substrate Integrated Gap Waveguide technology (SIGW) is designed and simulated. To achieve a good performance for SIGW structure, a proper unit-cell in range of 16-40 GHz, which is completely convenient for 5G application, is designed. The proposed rat-race coupler has lower leakage and loss, in comparison to conventional ones. This coupler has a center frequency and bandwidth of 31GHz and 19.34%, respectively; which is calculated by considering $vert S_{11} vert lt -$10dB. The coupler has also 0.5 dB tolerance in balance power-dividing at practical spectrum.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127146853","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}

{"title":"Joint Pilot and Data Power Control in Cell-Fee Massive MIMO System","authors":"H. Masoumi, M. Emadi","doi":"10.1109/MMWATT.2018.8661232","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661232","url":null,"abstract":"This paper delves into the resource allocation problem in the fifth generation (5G) of wireless networks. Thus, we consider a recently-emerged transformation of the massive multiple-input multiple-output (mMIMO) systems known as cell-free mMIMO (CF-mMIMO) system. To this end, the uplink achievable data rate of the CF-mMIMO system with different transmitted pilot and data powers and maximum-ratio combining (MRC) is obtained. Then, joint pilot and data power control optimization problem with the max-min fairness uplink rate among the users subject to limited energy budget in a coherence interval is presented. To tackle with the non-convexity of the problem, we relax the original problem into a generalized geometric programming (GGP) which is proven to be tight. Moreover, simulation results are presented to illustrate the benefits of the proposed optimization problem.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115565591","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}

{"title":"Sinusoidally Modulated Hybrid Plasmonic Leaky Wave Optical Antenna","authors":"Vahid Ghaffari, I. Aryanian, L. Yousefi","doi":"10.1109/MMWATT.2018.8661230","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661230","url":null,"abstract":"A sinusoidally modulated optical leaky wave antenna is proposed to operate at the standard optical communication wavelength of 1550 nm. In order to have a beam in the desired direction, and simultaneously, control the side lobe level, a new algorithm is proposed in which the holographic method is modified based on Taylor distribution. The antenna is designed based on hybrid plasmonics structures leading to a high efficiency for the proposed structure. The proposed optical antenna is numerically analyzed using a full wave simulation. The numerical results show a gain of 10 dB, an impedance bandwidth of 28%, and a side lobe level of −17 dB, for the proposed antenna. The proposed antenna can have applications in integrated optical interconnects, highly integrated LIDARS, optical wireless communication, and plasmonics solar cells.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"66 2-3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116602554","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}

{"title":"Recent Advances in Spatial Analog Optical Computing","authors":"A. Vafa, Parisa Karimi, A. Khavasi","doi":"10.1109/MMWATT.2018.8661241","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661241","url":null,"abstract":"Traditional analog computers that perform mathematical operations electronically or mechanically suffer from their relatively large size and slow response. Recently, the idea of spatial analog optical computing has overcome these restrictions. The different techniques to implement spatial analog optical computation can be categorized into two fundamental approaches: (I) metasurface (MS) approach and (II) Green’s function (GF) approach. In the first approach, a metasurface is designed to implement the Green’s function of the desired operator in the spatial domain. This means that this approach needs two sub-blocks to perform Fourier and inverse Fourier transform. On the other hand, in the second approach, the optical field is modified while it travels through an appropriately designed structure such that the desired operator is directly implemented in the spatial Fourier domain. GF approach takes advantage of the nonlocal (k-dependent) response of properly tailored optical metamaterials and metasurfaces. But it imposes another restriction that only transfer functions with even symmetry can be realized unless symmetry is broken. In this review, after explaining the mentioned approaches, we classify the operators designed by the GF method in two groups based on their resonant or non-resonant nature. The resonant designs such as those that are based on surface mode excitation possess a high-gain response in a relatively narrow bandwidth. On the contrary, the non-resonant designs such as those that use photonic spin Hall effect provide higher bandwidth with a low gain. Next, we review a rich set of the applications of spatial analog optical computing e.g., edge detection, image smoothing, periodic noise suppression, Grovers quantum search algorithm, solving integro-differential equations, etc. which have emerged from different mathematical operations e.g., spatial differentiation, spatial integration, hig/low pass filtering, Laplace operator, etc. implemented optically. Most of these ideas have been investigated numerically although experimental demonstrations have been presented in some cases.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127277845","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}

{"title":"A 5G Multibeam Antenna Including Rotman Lens and Slot Array Antenna","authors":"A. Shahi, M. Mohammad‐Taheri, I. Aryanian","doi":"10.1109/MMWATT.2018.8661224","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661224","url":null,"abstract":"in this paper, a multibeam network is designed and simulated in 28 GHz which consists a Rotman lens and a planar slot array antenna. The slot array antenna is implemented on Substrate Integrated Waveguide (SIW) and is fed by a microstrip Rotman lens. The planar slot array antenna and Rotman lens are connected to each other using a transition from microstrip to SIW. Five distinct beams are realized through the use of Rotman lens with gain of about 16 dBi. The efficiency of multibeam antenna fed by each of the five beam ports is in the range of 60% to 70% which is higher than that of presented in other works due to better design of dummy port configuration.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121636882","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}

{"title":"MMWaTT 2018 Organizing Committee","authors":"","doi":"10.1109/mmwatt.2018.8661220","DOIUrl":"https://doi.org/10.1109/mmwatt.2018.8661220","url":null,"abstract":"","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129924498","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}

{"title":"Design of a Pulsed-Terahertz Photoconductive Antenna for Spectroscopy Applications","authors":"Sajad Niknam, M. Yazdi, Salman Behboudi Amlashi","doi":"10.1109/MMWATT.2018.8661244","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661244","url":null,"abstract":"In this paper, a photoconductive antenna (PCA) is designed and simulated which has some influential characteristics for spectroscopy of biological tissues. Firstly, the designed antenna has a broadband characteristic and can sweep from 0.3 THz to more than 2 THz. As the second feature, the circular polarization of this terahertz emitter can be useful in analyzing birefringence tissues that have different responses for linear and circular polarizations. For this purpose, a log-spiral metal strip is laid down on a GaAs substrate, which is then fed by a bowtie antenna. Meanwhile, modelling optic and electromagnetic physics in one package has certain difficulties, so laser beam illumination is modelled by COMSOL primarily for photocurrent generated between electrodes. Afterwards, calculated photocurrent has been imported to CST package as the excitation current. In addition, a dielectric lens is put on the back of the semiconductor substrate to increase the gain and consequently the efficiency of terahertz emitter. Finally, for the purpose of the reduction in the amplitude of noisy echoes, an anti-echo layer is located between substrate and lens that increases severely the optic-to-terahertz conversion rate of terahertz system.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130891660","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}

{"title":"A Millimeter-wave High Selective Lowpass Filter in Suspended Stripline Technology","authors":"Seyyed Milad Miri, K. Mohammadpour‐Aghdam, Seyyed Omidreza Miri","doi":"10.1109/MMWATT.2018.8661231","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661231","url":null,"abstract":"This paper represents design and measurements of a low loss, sharp band-edge roll-off lowpass filter with wide stopband and high rejection level with cut-off frequency at 50 GHz, using suspended stripline (SSL) technology, implemented on 0.127 mm-thick substrate with dielectric constant of 2.2. The proposed structure is comprised of a 13th order generalized Chebyshev lowpass filter which enjoys integrated waveguide-to-SSL transitions at filter ports. This filter can be used in frontend of a millimeter-wave down converter. Final design of filter is analyzed using 3D full-wave simulator. Measurement results are also presented to verify the performance of filter.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133364055","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}