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Frozen-Light Modes in 3-way Coupled Silicon Ridge Waveguides 3路耦合硅脊波导中的冻光模式
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8713100
Raed Almhmadi, K. Sertel
{"title":"Frozen-Light Modes in 3-way Coupled Silicon Ridge Waveguides","authors":"Raed Almhmadi, K. Sertel","doi":"10.23919/USNC-URSI-NRSM.2019.8713100","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8713100","url":null,"abstract":"Frozen-light modes supported by the stationary inflection point (SIP) within the pass band of 3-way coupled periodic silicon ridge waveguides is demonstrated. Precise tuning of the coupling between forward and backward propagating modes lead to mode degeneracy with vanishing group velocity. The unit cell is tuned to obtain the SIP on the third branch in the dispersion diagram. Subsequently, we demonstrate a finite structure with 23 unit cells to support the frozen mode at the SIP frequency. For this example, the group velocity at the SIP is 385 times slower than speed of light in vacuum. Transmission resonances of the finite structure, as well as the field distribution within the device at the SIP frequency are studied and presented.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125314338","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: 8
A Broadband Printed Conical Bowtie Dipole Antenna with an Integrated Balun 集成Balun的宽带印刷锥形领结偶极子天线
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8713028
A. Desai, P. Nayeri
{"title":"A Broadband Printed Conical Bowtie Dipole Antenna with an Integrated Balun","authors":"A. Desai, P. Nayeri","doi":"10.23919/USNC-URSI-NRSM.2019.8713028","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8713028","url":null,"abstract":"A novel design for a broadband printed dipole antenna element is presented. The broad bandwidth is achieved by introducing a conical bowtie dipole geometry and optimization of the feeding network, which is implemented as a microstrip integrated balun. The proposed printed dipole antenna achieves an impedance bandwidth of 820 MHz with good radiation characteristics. The antenna is designed for 2.45 GHz and finds application in a variety of wireless energy harvesting and power transfer systems and has potential for dual-polarized operation.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125869045","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
Pulsars at Low Radio Frequencies, Cyclic Spectroscopy, and Pulsar Timing Arrays 脉冲星在低无线电频率，循环光谱学，和脉冲星定时阵列
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8712895
T. Dolch
{"title":"Pulsars at Low Radio Frequencies, Cyclic Spectroscopy, and Pulsar Timing Arrays","authors":"T. Dolch","doi":"10.23919/USNC-URSI-NRSM.2019.8712895","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8712895","url":null,"abstract":"Pulsars at low radio frequencies $( < 400$ MHz) are ripe with astrophysical applications. For the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) pulsar timing array (PTA), the continual search for and discovery of new pulsars with single-dish telescopes (Arecibo Observatory and the Green Bank Telescope) is an essential part of the project. At Long-Wavelength Array (LWA) frequencies of 10–88 MHz, pulsar signals are highly scattered from the ionized interstellar medium (IISM). However, monitoring IISM effects along the line of sight to each pulsar characterizes the overall noise budget for gravitational wave detection. In some cases the effects of the very low frequency IISM can be mitigated, either through wideband template profile timing or through cyclic spectroscopy. Aside from PTAs, monitoring pulsars at very low frequencies can inform a plethora of topics in pulsar astrophysics: additional neutron star discoveries, frequency-dependent dispersion measures, solar wind science through high-cadence pulsar monitoring campaigns, and giant pulses. An expanded continent-wide LWA-Swarm would assist gravitational wave (GW) detection by resolving pulsar scattering screens and by providing higher sensitivity, leading to improved cyclic spectroscopy IISM deconvolution on more pulsars. Pulsar discoveries can also be made by following up unidentified steep-spectrum point sources in a LWA-Swarm sky survey.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134000514","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
Design of UWB Small Loop Antenna with Continuous Tuning Frequency 1–10 MHz 1 - 10mhz连续调谐频率的超宽带小环路天线设计
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8713076
Yubin Cai, Daisong Zhang, Y. Rahmat-Samii
{"title":"Design of UWB Small Loop Antenna with Continuous Tuning Frequency 1–10 MHz","authors":"Yubin Cai, Daisong Zhang, Y. Rahmat-Samii","doi":"10.23919/USNC-URSI-NRSM.2019.8713076","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8713076","url":null,"abstract":"This paper presents a novel UWB small loop antenna with continuous tuning frequency 1–10 MHz. A prototype of the design is fabricated and measured to demonstrate the effectiveness of the concept. Accurate frequency tuning is achieved by incorporating tolerances of the electronics, utilizing accurate circuit model, and extrapolating capacitor values through high order polynomial curve fitting.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132839021","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
Phase-Space Dynamic of Coherent Wave-Particle Interaction in the Radiation Belts 辐射带中相干波粒相互作用的相空间动力学
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8712945
Poorya Hosseini, V. Harid, M. Gołkowski
{"title":"Phase-Space Dynamic of Coherent Wave-Particle Interaction in the Radiation Belts","authors":"Poorya Hosseini, V. Harid, M. Gołkowski","doi":"10.23919/USNC-URSI-NRSM.2019.8712945","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8712945","url":null,"abstract":"Modeling the interaction between coherent whistler mode waves and radiation belt electrons is an important component of space weather dynamics. Two main aspects of the wave-particle interaction are, the amplification of coherent VLF waves by an unstable radiation belt electron distribution and the precipitation and/or acceleration of these particles by the waves. The solution of the full problem requires a numerical self-consistent code which captures both effects simultaneously. Unfortunately, self-consistent codes of nonlinear phenomena are computationally intensive and the results can be challenging to interpret. To quantify the effect of waves on particles, we employ a novel approach wherein the particle trajectories are traced backward in time. The validity of this method is based on conservation of phase space density formalized in Liouville's theorem. The model resolves in high resolution the formation of a depletion in the region of phase-space known as a phase space hole that is associated with nonlinear wave growth.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122227608","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
Rectangular Waveguide Loaded with a Dielectric Slot in a Thick Metallic Shield 厚金属屏蔽中加载介电槽的矩形波导
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8713050
Abdulaziz H. Haddab, E. Kuester, C. Holloway
{"title":"Rectangular Waveguide Loaded with a Dielectric Slot in a Thick Metallic Shield","authors":"Abdulaziz H. Haddab, E. Kuester, C. Holloway","doi":"10.23919/USNC-URSI-NRSM.2019.8713050","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8713050","url":null,"abstract":"Resonant transmission through a dielectric-loaded slot in a thick conducting diaphragm embedded in a rectangular waveguide is modeled using an analytical approximation based on the slot being small compared to a free space wavelength. Image theory relates this problem to a metasurface consisting of an array of such slots. We demonstrate the existence of ordinary (Fabry-Perot) transmission resonances associated with the fundamental mode of the slot, as well as extremely narrow-band (Fano) resonances involving the higher-order modes in the slot. The theoretical predictions are confirmed through full-wave numerical simulation and by experimental measurement.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125171936","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
Hybrid Wedge-integrated Plasmonic-photonic Waveguide 混合楔形集成等离子体光子波导
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8712883
Z. Manzoor, M. Panahi, A. Pak
{"title":"Hybrid Wedge-integrated Plasmonic-photonic Waveguide","authors":"Z. Manzoor, M. Panahi, A. Pak","doi":"10.23919/USNC-URSI-NRSM.2019.8712883","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8712883","url":null,"abstract":"In this work, a novel design of hybrid integrated plasmonic-photonic waveguide is proposed to work at 1550 nm wavelength and have low loss specification of photonic waveguides and high optical mode confinement of plasmonic waveguides. Unlike other designs, metallic nanoparticles are deposed inside the mask layer to have less radiation from the waveguide and increase transmitting light. Moreover, by using wedge shape for the mask layer of the waveguide, higher order modes suppress.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124376299","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
Improving Accuracy of Inkjet Printed Core Body WRAP Temperature Sensor Using Random Forest Regression Implemented with an Android App 利用随机森林回归提高喷墨打印核心车身WRAP温度传感器的精度
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8712966
Md Juber Rahman, B. Morshed
{"title":"Improving Accuracy of Inkjet Printed Core Body WRAP Temperature Sensor Using Random Forest Regression Implemented with an Android App","authors":"Md Juber Rahman, B. Morshed","doi":"10.23919/USNC-URSI-NRSM.2019.8712966","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8712966","url":null,"abstract":"Inkjet printing (IJP) technology holds tremendous promise for the development of low cost, environment friendly and body-worn biomedical sensors. In this study, we have investigated the integration of a flexible body-worn disposable IJP Wireless Resistive Analog Passive (WRAP) temperature sensor with an android app for real-time monitoring of core body temperature with high accuracy using features extracted from the sensor response. Random Forest has been used for feature selection and regression. With 5-fold cross validation we have achieved an RMSE = 0.98, R-squared value = 0.99, and mean absolute error, MAE = 0.59 for temperature estimation. The model is applicable for the development of IJP body-worn sensors for various other physiological sensing e.g. breathing, heart rate.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124530875","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: 8
3D-Printed Frequency Scanning Slotted Waveguide Array with Wide Band Power Divider 带宽带分压器的3d打印频率扫描开槽波导阵列
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8712999
Kunchen Zhao, Grant Senger, N. Ghalichechian
{"title":"3D-Printed Frequency Scanning Slotted Waveguide Array with Wide Band Power Divider","authors":"Kunchen Zhao, Grant Senger, N. Ghalichechian","doi":"10.23919/USNC-URSI-NRSM.2019.8712999","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8712999","url":null,"abstract":"In this paper we present the design, simulation, and fabrication results of a full 3D-printed frequency scanning slotted waveguide array (SWA) with an accommodating 3D printed power divider and a matched termination. An 18 × 4 non-resonant SWA operating at 12 - 18 GHz is designed with symmetric beam scanning range. A 1:4 waveguide power divider is proposed to feed the SWA. Inductive walls are added to the power divider to improve the impedance matching. A conical load is designed based on the lossy 3D printing material to terminate the SWA. Fabrication is done by fused deposition modeling (FDM) 3D printing technique. Simulation performed with CST shows a symmetric beam scan range from -15.2° to +15.4°. The broadside gain is 15 dBi at 14 GHz. The lowest and the highest gains are 9.3 dBi at 12 GHz and 23 dBi at 16 GHz, respectively. Although there were documented works on non-scanning 3D printed SWAs, to the best of our knowledge, this is the first work on 3D printed two-dimensional scanning SWAs.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115582031","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
Wideband Leakage Cancellation Network for Monostatic Continuous-Wave Radars 单台连续波雷达宽带漏损抵消网
2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI: 10.23919/USNC-URSI-NRSM.2019.8712885
F. Foroughian, A. Fathy
{"title":"Wideband Leakage Cancellation Network for Monostatic Continuous-Wave Radars","authors":"F. Foroughian, A. Fathy","doi":"10.23919/USNC-URSI-NRSM.2019.8712885","DOIUrl":"https://doi.org/10.23919/USNC-URSI-NRSM.2019.8712885","url":null,"abstract":"For a monostatic stepped-frequency continuouswave (SFCW) radar operating from 2 GHz to 4 GHz, a wideband passive leakage cancellation network using two circulators and a wideband 180-degree power combiner has been developed. Two similar circulators are utilized to provide two identical leakage signals and then leakage is canceled when both leakage signals are combined by a 180-degree power combiner. The wideband 180-degree power combiner has been implemented using parallelstrip lines. This proposed leakage canceller provides more than 33 dB cancellation over 2 GHz bandwidth, has 27.7 dB cancellation depth, does not require exhaustive adjustments, and is suitable for monostatic radar operation. The successful realtime monitoring of the subject using this monostatic radar indicates that the proposed leakage canceller can be utilized in a monostatic CW radar with a wideband antenna.","PeriodicalId":142320,"journal":{"name":"2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129664802","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: 3
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