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2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)最新文献

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Performance investigation of space diversity for a 28/38 GHz MIMO antenna (applicable to mm-wave mobile network) 28/38 GHz MIMO天线空间分集性能研究(适用于毫米波移动网络)
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869872
H. Aliakbari, A. Abdipour, A. Costanzo, D. Masotti, R. Mirzavand, P. Mousavi
{"title":"Performance investigation of space diversity for a 28/38 GHz MIMO antenna (applicable to mm-wave mobile network)","authors":"H. Aliakbari, A. Abdipour, A. Costanzo, D. Masotti, R. Mirzavand, P. Mousavi","doi":"10.1109/MMWATT.2016.7869872","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869872","url":null,"abstract":"A multiple-input-multiple-output (MIMO) dual-band antenna system consisting of two elements, each of which built up of circularly polarized slotted patch antenna for mm-wave band 5G wireless handheld and portable terminals is described. Space diversity is used to achieve a good independent channel fading in MIMO systems. In theoretical analysis of MIMO systems often assume that each antenna is isolated from the other elements. It has been shown that the antenna spacing has a significant effect on both near-field and far-field performance of each element in two independent working bands and should be optimized in millimeter wave compact dual-band MIMO arrays. However, the main problem is that an optimized distance for lower band may not be suitable for upper band and vice versa. If electromagnetic limitations and interactions of the antennas are ignored, the MIMO system performance may be underestimated or overestimated.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132061821","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: 7
Millimeter wave rectangular waveguide to grounded CPW transition on multi-layer substrate 多层基板上毫米波矩形波导到接地CPW的转换
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869926
Ali Hosseini-Fahraji, K. Mohammadpour‐Aghdam, R. Faraji-Dana
{"title":"Millimeter wave rectangular waveguide to grounded CPW transition on multi-layer substrate","authors":"Ali Hosseini-Fahraji, K. Mohammadpour‐Aghdam, R. Faraji-Dana","doi":"10.1109/MMWATT.2016.7869926","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869926","url":null,"abstract":"A rectangular waveguide (WR) to grounded coplanar waveguide (GCPW) is presented for operation in the U-band from 40 to 60 GHz. The WR-to-GCPW is designated for the U-band integrated down-converter system where it connects U-band horn antenna to an integrated system. The proposed transition based on the probe coupling technique is implemented on a single layer Rogers RO4003C RF laminate, and then is extended for the multi-layer substrate in the desired system.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132232170","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
Contact-free solution for millimeter-wave on-wafer VNA measurements 毫米波片上VNA测量的无接触解决方案
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869921
M. Abdolhamidi, M. Mohammad‐Taheri
{"title":"Contact-free solution for millimeter-wave on-wafer VNA measurements","authors":"M. Abdolhamidi, M. Mohammad‐Taheri","doi":"10.1109/MMWATT.2016.7869921","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869921","url":null,"abstract":"Design procedure and simulation results of a contact-free transition for mmW VNA-based on-wafer measurements are presented. The tightly compressed configuration of the proposed design in addition to its compatibility with standard silicon fabrication processes are among its remarkable characteristics. The radiation loss at the transition region which is the most troublous side effect in non-contact probing is extensively suppressed in the present work. The configuration shows more than 10 dB of return losses almost in the entire D band (110 ∼ 170 GHz). In addition, less than 0.8 dB of insertion losses is achieved in the simulations in the same frequency band.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128441936","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
Simulation of THz photoconductive antennas loaded by different metallic nanoparticles 不同金属纳米粒子负载太赫兹光导天线的仿真
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869917
S. Ghorbani, M. Bashirpour, M. Forouzmehr, M. Kolahdouz, M. Neshat
{"title":"Simulation of THz photoconductive antennas loaded by different metallic nanoparticles","authors":"S. Ghorbani, M. Bashirpour, M. Forouzmehr, M. Kolahdouz, M. Neshat","doi":"10.1109/MMWATT.2016.7869917","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869917","url":null,"abstract":"In this paper, we study the effect of different metallic nanoparticles loaded in the gap of a silicon-on-sapphire (SOS) photoconductive antenna. Three different metals (Au, Ag, and Al) are considered as the material of the nanostructures which were loaded in the gap of a silicon-on-sapphire (SOS) photoconductive antenna as a THz source. The whole structure has been simulated to obtain the generated photocurrent. More than 132% improvement in photocurrent is demonstrated when using Al nanostructures.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126724917","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: 6
Optical absorption enhancement in LTG-GaAs for efficiency improvement of THz photoconductive antennas LTG-GaAs光吸收增强对太赫兹光导天线效率的提高
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869865
M. Bashirpour, S. Ghorbani, M. Forouzmehr, M. Kolahdouz, M. Neshat
{"title":"Optical absorption enhancement in LTG-GaAs for efficiency improvement of THz photoconductive antennas","authors":"M. Bashirpour, S. Ghorbani, M. Forouzmehr, M. Kolahdouz, M. Neshat","doi":"10.1109/MMWATT.2016.7869865","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869865","url":null,"abstract":"A novel structure for THz photoconductive antennas (PCA) has been proposed to enhance the optical absorption, and consequently the power conversion efficiency. In the proposed structure, the surface of the low-temperature-grown GaAs (LTG-GaAs) substrate is textured to create an array of nanodisks where an array of silver nanodisks is placed 300 nm under the surface. The simulation results indicate that laser pulse reflection from the LTG-GaAs surface decreases to less than one percent as compared to around 30 % reflection for surfaces with no nanostructure features. As a result, the photo current increases by a factor of around 2.6 for the proposed structure. This would increase the generated THz power by the current enhancement factor squared.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115796365","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: 6
Triple-band metamaterial absorber based on electric excitation of split ring resonator magnetic resonance 基于劈裂环谐振腔磁振电激励的三波段超材料吸收体
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869871
Nasrollah Karampour, N. Nozhat
{"title":"Triple-band metamaterial absorber based on electric excitation of split ring resonator magnetic resonance","authors":"Nasrollah Karampour, N. Nozhat","doi":"10.1109/MMWATT.2016.7869871","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869871","url":null,"abstract":"In this paper, an absorber with two nested split ring resonators (SRRs) is introduced that its absorption spectrum has three absorption peaks by the values of 99.8%, 97.52%, and 94.98% at the frequencies of 8.5, 14.7 and 23.9 THz, respectively. In order to understand the performance of the absorber, the proposed structure is excited in two different situations. The simulation results reveal that when the incident electric field is in the direction of the symmetry axis of the structure, an integer number of the whole-wavelength of the current density wave is formed on the SRR and when the electric field is launched in the opposite direction that the structure is asymmetric, the excited modes are an odd number of half-wavelength of the current density wave. The first and third absorption peaks are related to the first and second modes of the SRR and the second absorption peak is due to the resonance of electric filed between the top rod elements. Also, the effect of adding extra arms to the SRRs on the absorption spectrum is investigated.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115685048","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: 6
Tunable and polarization insensitive plasmon resonance gratings based on spheroidal nanoparticles 基于球形纳米颗粒的可调谐极化不敏感等离子体共振光栅
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869928
F. Namin
{"title":"Tunable and polarization insensitive plasmon resonance gratings based on spheroidal nanoparticles","authors":"F. Namin","doi":"10.1109/MMWATT.2016.7869928","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869928","url":null,"abstract":"The optical properties of arrays of plasmonic nanoparticles (NPs) been the subject of extensive research in recent years. Plasmonic NPs with dimensions much smaller than the incident wavelength display a resonant behavior where the electromagnetic (EM) fields are strongly enhanced and highly confined to the surface of the NP. This property of plasmonic NPs is of great interest in numerous applications. Most theoretical studies have utilized spherical NPs. This is due to the fact that scattering behavior of spheres can be studied analytically. In a recent paper, it was shown that by using spheroidal NPs, it is possible to tune the resonance frequency. However, the response of such structures is highly polarization dependent. In this paper, we propose how it is possible to overcome this polarization dependence using a new unit cell geometry.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114727773","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
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