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Compact high frequency receiver system for Arecibo observatory radiation pattern measurement 用于阿雷西博天文台辐射方向图测量的紧凑型高频接收系统
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304932
Lian Orraca, N. Aybar, Ronnie Carrasquillo, Rafael Medina, R. Rodríguez-Solís, J. Colom-Ustariz, F. O. Fernandez-Rodriguez
{"title":"Compact high frequency receiver system for Arecibo observatory radiation pattern measurement","authors":"Lian Orraca, N. Aybar, Ronnie Carrasquillo, Rafael Medina, R. Rodríguez-Solís, J. Colom-Ustariz, F. O. Fernandez-Rodriguez","doi":"10.1109/RWS.2018.8304932","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304932","url":null,"abstract":"The Arecibo Observatory, second largest radio telescope in the world, has two High Frequency (HF) transmitters at 5.125 MHz and 8.175 MHz used to heat and study the ionosphere. This paper presents the methodology to measure the near-field radiation pattern of the HF transmitters and transform it to far-field. The work includes the design, development, and testing results of a receiver system that will eventually go into an unmanned aerial vehicle (UAV) which will record the electric field measurements. Proof of concept testing resulted in a received signal with a 25 dB signal to noise ratio (SNR).","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127164480","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
Design of a low complexity SMILE array 低复杂度SMILE阵列的设计
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304957
L. Light, Yikun Huang, Ali R. Jishi, Qiang Xu, Y. Wang
{"title":"Design of a low complexity SMILE array","authors":"L. Light, Yikun Huang, Ali R. Jishi, Qiang Xu, Y. Wang","doi":"10.1109/RWS.2018.8304957","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304957","url":null,"abstract":"The Spatial Multiplexing of Local Elements (SMILE) technique utilizes a low complexity switch network to combine multiple data streams from different array elements into one data stream, which requires only one RF receiver. The original SMILE array uses parallel ADCs after de-multiplexing. We explored a novel approach of using a single ADC before de-multiplexing in digital domain. This switching scheme effectively reduces the amount of costly RF hardware by a factor of N for an N — element array without compromising full array functionality. Wireless lab tests were carried out. The recovered data and the spectrum after SMILE array beamforming are presented.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"4 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126066682","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
Enhancing the quality factor of thin film printed coils for efficient wireless power transfer 提高薄膜印刷线圈的质量系数，实现高效的无线电力传输
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304936
Y. Nishizawa, Yoshiaki Narusue, Y. Kawahara
{"title":"Enhancing the quality factor of thin film printed coils for efficient wireless power transfer","authors":"Y. Nishizawa, Yoshiaki Narusue, Y. Kawahara","doi":"10.1109/RWS.2018.8304936","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304936","url":null,"abstract":"We introduce a technique to improve thin film printed coils for magnetically coupled resonance wireless power transfer (MCR-WPT). Thin film coils have a much higher resistance and lower quality factor Q than common copper wire because its very flat cross-section causes severe skin effect. We propose the divide-and-merge structure to successfully mitigate skin effect and improve the Q factor of thin film printed coils. With our method, a single-turn square coil with 10 cm sides achieved a higher Q at the high frequency used for MCR-WPT compared to other methods. Our method produced a 21% improvement in Q compared to double-sided parallel structure at 10 MHz despite using smaller copper volume.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"172 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127540153","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
Smart sticker including split square rings for adapting mobile phone radiation pattern to lower SAR 智能贴纸，包括分割方形环，以适应移动电话辐射模式，以降低SAR
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304975
Hengyi Zhou, A. Pal, A. Mehta, D. Mirshekar-Syahkal, H. Nakano
{"title":"Smart sticker including split square rings for adapting mobile phone radiation pattern to lower SAR","authors":"Hengyi Zhou, A. Pal, A. Mehta, D. Mirshekar-Syahkal, H. Nakano","doi":"10.1109/RWS.2018.8304975","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304975","url":null,"abstract":"A Split Square Rings (SSR) based on a sticker is presented to modify the direction of mobile phone radiation pattern. This smart sticker permits the radiation from the antenna of a phone to steer away from the user head. The presented smart sticker is designed for 5 GHz WiFi band (IEEE 802.11ac) for VOIP (Voice Over Internet Protocol) and data applications. It is observed that the smart sticker reduces the peak SAR (Specific Absorption Rate) value averaged over 10g of human head tissues from 2.11 W/kg to a safety value of 1.46 W/kg (a reduction of over 30%).","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131379271","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
Truly aliasing-free digital RF-PWM power coding scheme for switched-mode power amplifiers 真正的无混叠数字RF-PWM功率编码方案的开关模式功率放大器
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304948
Omer Tanovic, R. Ma
{"title":"Truly aliasing-free digital RF-PWM power coding scheme for switched-mode power amplifiers","authors":"Omer Tanovic, R. Ma","doi":"10.1109/RWS.2018.8304948","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304948","url":null,"abstract":"This paper presents a novel method for multilevel power coding and upconversion to RF frequency, by the means of a digital radio-frequency pulse width modulation (RF-PWM). Delta-sigma modulation (ΔΣM) and memoryless predistortion are used to mitigate spectral aliasing effects, inherent to digital RF-PWM operation, and achieve high linearity of the transmitter. In this method, time-domain characterization of a multilevel digital RF-PWM was fully exploited in order to provide optimal parameter selection for the ΔΣM, which in turn enables aliasing-free digital RF-PWM that runs at reasonable clock speeds. Experiments with an arbitrary waveform generator are used to demonstrate effectiveness of the proposed novel power encoding scheme. The novel algorithm offers in-band SNR of —45dB, while maintaining coding efficiency of about 55%, for a 20MHz-bandwidth 64QAM signal, while mere RF-PWM, running at the same clock speed, can achieve SNR of only — 10dB.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132321540","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
Interaction of high-power microwaves with low-temperature plasma in a gas-discharge-tube-loaded SIW structure 高功率微波与低温等离子体在气体放电管负载SIW结构中的相互作用
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304979
Z. V. Missen, A. Semnani, E. Viveiros, D. Peroulis
{"title":"Interaction of high-power microwaves with low-temperature plasma in a gas-discharge-tube-loaded SIW structure","authors":"Z. V. Missen, A. Semnani, E. Viveiros, D. Peroulis","doi":"10.1109/RWS.2018.8304979","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304979","url":null,"abstract":"Measured and simulated interactions between high-power microwaves and low-temperature plasma are investigated in this work. In a fabricated L-band substrate integrated waveguide with coplanar waveguide ends, a gas discharge tube is inserted through the waveguide as a plasma cell. Measurements of reflected and absorbed powers by the plasma are presented and their implications discussed. These results provide a groundwork for the development of a complete model for the interaction between high-power microwaves and low-temperature plasmas. Such a model can improve designs for plasma-enabled tunable RF devices.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132794738","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
Design and characterization of antenna arrays in eWLB package for 61 GHz radar applications 用于61 GHz雷达应用的eWLB封装天线阵列的设计和特性
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304933
M. Frank, Pol Ghesquière, S. Kiefl, R. Weigel, A. Koelpin
{"title":"Design and characterization of antenna arrays in eWLB package for 61 GHz radar applications","authors":"M. Frank, Pol Ghesquière, S. Kiefl, R. Weigel, A. Koelpin","doi":"10.1109/RWS.2018.8304933","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304933","url":null,"abstract":"This paper presents the design of several two element antenna arrays in an eWLB package for 61 GHz radar applications. The antenna arrays are either formed of dipoles or folded dipoles. Different feeding structures were developed in order to match MMICs with differential or single-ended ports. Measurements of both insertion loss and radiation pattern were performed for five different antenna arrays. The measurement results are in good agreement with the previously performed simulations.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133493883","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
Miniaturized evanescent-mode cavity SIW bandpass filter with spurious suppression 具有杂散抑制的小型化倏逝模腔SIW带通滤波器
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304996
S. Saeedi, H. Sigmarsson
{"title":"Miniaturized evanescent-mode cavity SIW bandpass filter with spurious suppression","authors":"S. Saeedi, H. Sigmarsson","doi":"10.1109/RWS.2018.8304996","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304996","url":null,"abstract":"A compact evanescent-mode cavity SIW band-pass filter with a wide stopband is presented. To achieve a smaller profile, resonators are required to be highly loaded. However, the spurious responses become closer to the main passband when the loading is accomplished radially. Lumped element capacitive loading along the post axis is used to suppress the spurious responses. Axial loading, compared to radial loading, changes the configuration of the higher resonance modes and pushes them to higher frequencies. As a proof of concept, two second-order prototype bandpass filters with axial and radial capacitive loading are fabricated and measured. Measurements are in good agreement with simulations and demonstrate the validity of the proposed technique.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122670664","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: 4
Micro and mini drone classification based on coherent radar imaging 基于相干雷达成像的微型和微型无人机分类
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8305004
E. Chang, R. Sturdivant, Bryce S. Quilici, Erich W. Patigler
{"title":"Micro and mini drone classification based on coherent radar imaging","authors":"E. Chang, R. Sturdivant, Bryce S. Quilici, Erich W. Patigler","doi":"10.1109/RWS.2018.8305004","DOIUrl":"https://doi.org/10.1109/RWS.2018.8305004","url":null,"abstract":"Low, slow, and small unmanned aerial system (LSS-UAS) are a growing threat to the civil and military sectors. This paper reports the results of a feasibility study on a radar-based drone feature-classification system. A 9.6 GHz CW radar was used to acquire Doppler data. Coherent integration of the data in conjunction with motion extraction and compensation turned this conventional Doppler radar into a one-dimensional inverse synthetic aperture radar (ISAR), which produced the detailed image of a mini drone. This result paves the way for a fully intelligent classification system with multiple sensors for countering the LSS-UAS threat.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130474705","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
A new turbo coded modulation approach exploiting non-binary field 一种利用非二进制场的新型turbo编码调制方法
2018 IEEE Radio and Wireless Symposium (RWS) Pub Date : 1900-01-01 DOI: 10.1109/RWS.2018.8304949
Toshiki Matsumine, H. Ochiai
{"title":"A new turbo coded modulation approach exploiting non-binary field","authors":"Toshiki Matsumine, H. Ochiai","doi":"10.1109/RWS.2018.8304949","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304949","url":null,"abstract":"We present a new coded modulation scheme based on the non-binary convolutional codes (CCs) defined over finite field. The outputs of the component codes defined over GF(2q) are directly mapped onto the signal space with 2q-ary constellation points. By choosing the symbols input to each CC from a strict subset of GF(2q), the constellation redundancy is embedded, thereby achieving coding gain. Furthermore, by the parallel concatenation of the two CCs together with iterative decoding, the capacity approaching performance can be achieved. Through the symbol-based extrinsic information transfer (EXIT) chart analysis, an efficient search algorithm for the best tap coefficients of the CCs is developed. The frame error rate (FER) performance comparisons with conventional coded modulation schemes demonstrate the superiority of the proposed approach.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132525663","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
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