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2014 IEEE International Microwave and RF Conference (IMaRC)最新文献

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Reflection characteristics of inhomogeneous plasma backed by radar absorbing material 雷达吸波材料支撑下非均匀等离子体的反射特性
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-15 DOI: 10.1109/IMARC.2014.7039022
S. Antony, Hema Singh
{"title":"Reflection characteristics of inhomogeneous plasma backed by radar absorbing material","authors":"S. Antony, Hema Singh","doi":"10.1109/IMARC.2014.7039022","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039022","url":null,"abstract":"The radar cross section reduction can be achieved by controlling the reflections from the surface of the structure. Plasma envelope is one of the ways to control the reflections and scattering from the surface. The problem of EM propagation within bounded plasma can be approximated as multi-layered dielectric problem. The overall reflection from an inhomogeneous plasma on a RAM covered conducting surface is discussed in this paper. The assumed structure is multi-layered, consisting of plastic, plasma, radar absorbing material and conductor. The propagation characteristic of the electromagnetic wave is analyzed using impedance transformation method. The dependence of reflection behavior of the multilayered structure on the plasma parameters is studied. It is shown that the absorption and its bandwidth are improved due to plasma inhomogeneity.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121819894","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
Constrained Kalman filter based interference suppression in phased arrays 基于约束卡尔曼滤波的相控阵干扰抑制
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-15 DOI: 10.1109/IMARC.2014.7039029
P. Omgond, Hema Singh
{"title":"Constrained Kalman filter based interference suppression in phased arrays","authors":"P. Omgond, Hema Singh","doi":"10.1109/IMARC.2014.7039029","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039029","url":null,"abstract":"The constrained Kaiman filter-based adaptive algorithm has fast convergence and robustness towards direction-of-arrival (DOA) mismatch. This motivates its usage for interference suppression in phased arrays. The constraints related to high gain towards the desired source and minimum mean square error are imposed in the weight adaptation. The objective is to steer the mainbeam towards the desired direction and simultaneously nullify the interfering sources impinging the array from different directions. It is shown that the output SINR of the algorithm is higher than the well-known gradient-based improved LMS algorithm.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127177568","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
Active cancellation of probing in dipole arrays including mutual coupling effect 包括互耦效应的偶极子阵列探测的主动抵消
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-15 DOI: 10.1109/IMARC.2014.7039030
N. B. Ankaiah, Hema Singh, R. Jha
{"title":"Active cancellation of probing in dipole arrays including mutual coupling effect","authors":"N. B. Ankaiah, Hema Singh, R. Jha","doi":"10.1109/IMARC.2014.7039030","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039030","url":null,"abstract":"A modified improved LMS algorithm is used for active cancellation of probing sources in arbitrary linear dipole array. The mutual coupling is included in the formulation of the received signal vector and hence weight adaptation. The signal environment consists of the multiple narrowband uncorrelated desired and probing sources. The dipole array performance in adaptive nulling is analyzed in terms of output signal-to-interference-noise ratio (SINR) and adapted pattern. It is shown that parallel-in-echelon dipole array is able to maintain multilobe beamforming with accurate and deep nulls towards each probing source.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133139174","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
X-band voltage variable attenuators using PIN diodes 使用PIN二极管的x波段电压可变衰减器
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7039052
C. Shireesha, Rahul Sadhu, R. Harikumar
{"title":"X-band voltage variable attenuators using PIN diodes","authors":"C. Shireesha, Rahul Sadhu, R. Harikumar","doi":"10.1109/IMARC.2014.7039052","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039052","url":null,"abstract":"We present the design of PIN diode based medium-power Voltage Variable Attenuators realized on microstrip in the frequency range of 9.1-9.6 GHz. These reflective variable attenuators have a topology based on 90° hybrid couplers. Single hybrid coupled attenuators can be used for broadband operation. A double hybrid coupler design eliminates the ripple response in the high attenuation state, thereby increasing the dynamic range. Both the approaches have been presented in this paper. They not only exhibit good linearity, but also have a good VSWR match over the full frequency range and over all the attenuation levels.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"127 35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117171743","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
Design, fabrication and characterization of capacitive RF MEMS switches with low pull-in voltage 低拉入电压电容式RF MEMS开关的设计、制造与特性研究
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7038983
S. Shekhar, K. Vinoy, G. K. Ananthasuresh
{"title":"Design, fabrication and characterization of capacitive RF MEMS switches with low pull-in voltage","authors":"S. Shekhar, K. Vinoy, G. K. Ananthasuresh","doi":"10.1109/IMARC.2014.7038983","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7038983","url":null,"abstract":"The dielectric charging caused by high actuation voltages is one of the reasons behind the poor reliability of capacitive MEMS switches. This paper reports the design, fabrication and characterization of an RF MEMS switch with a very low-actuation voltage and high isolation. The device is fabricated on a glass substrate using a four mask surface micromachining process. The electromechanical characterization reveals a very low pull-in voltage of 4.8 V for the fabricated device. The RF measurement results show an insertion loss of 0.55 dB and an isolation of -47.6 dB at 40 GHz. The excellent RF performance makes these switches a suitable choice for very high frequency (K-band and above) applications.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115085262","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: 30
Electromagnetic compatibility of MARS Orbiter Mission spacecraft 火星轨道飞行器的电磁兼容性
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7039009
V. Raghavaiah, P. Sowjanya, R. L. Mini, P. Murthy, S. M. Muniraja, R. Renuka, G. K. R. Murali, D. Binu, Santhi Sankaranarayanan, V. S. Kumar, B. S. Srinivas, V. Hariharan, V. Srinivasan
{"title":"Electromagnetic compatibility of MARS Orbiter Mission spacecraft","authors":"V. Raghavaiah, P. Sowjanya, R. L. Mini, P. Murthy, S. M. Muniraja, R. Renuka, G. K. R. Murali, D. Binu, Santhi Sankaranarayanan, V. S. Kumar, B. S. Srinivas, V. Hariharan, V. Srinivasan","doi":"10.1109/IMARC.2014.7039009","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039009","url":null,"abstract":"The MARS Orbiter Mission (MOM) spacecraft carries on-board sensitive receiver and high gain antenna system to cater to the requirement of inter-planetary and deep space communication. This paper describes, among others, the stringent EMC requirements for MOM spacecraft, summary of EMC analysis carried out, modification on subsystem level EMI/EMC test limit and EMI/ESD mitigation techniques followed to achieve EMC compliance of MOM Spacecraft.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122788649","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
A parameterized cell design for high-Q, variable width and spacing spiral inductors 高q变宽变间距螺旋电感的参数化电池设计
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7039049
R. Manikandan, V. Vanukuru, A. Chakravorty, B. Amrutur
{"title":"A parameterized cell design for high-Q, variable width and spacing spiral inductors","authors":"R. Manikandan, V. Vanukuru, A. Chakravorty, B. Amrutur","doi":"10.1109/IMARC.2014.7039049","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039049","url":null,"abstract":"The on-chip planar spiral inductors having variable width (W) and spacing (S) across their turns are known to exhibit higher quality factors (Q). In this paper, we present an efficient parameterized cell (pcell) design in cadence using SKILL scripts for automatic layout generation of these complex, high-Q, variable W&S spiral inductors comprising of single ended and symmetric structures with rectangular, hexagonal, octagonal and circular spirals. Electromagnetic simulations are performed on the inductor layouts generated using the developed pcells. The constant W&S and variable W&S spiral inductor structures are fabricated in a 0.18 μm silicon on insulator process. Measurements show ~25% improvement in the quality factor of variable W%S spiral inductors compared to their constant W&S counterparts and also validates the proper operation of the developed inductor parameterized cells. The presented variable W&S inductor pcell significantly reduces the layout design time of RF circuit designers and also helps in the design automation of these complex inductor structures to boost their own performance and the RF circuits as well.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114241363","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
High gain UWB antenna using compact multilayer FSS 采用紧凑多层FSS的高增益超宽带天线
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7038980
Nagendra Kushwaha, Raj Kumar
{"title":"High gain UWB antenna using compact multilayer FSS","authors":"Nagendra Kushwaha, Raj Kumar","doi":"10.1109/IMARC.2014.7038980","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7038980","url":null,"abstract":"A High gain antenna for UWB application is presented in this paper. The UWB characteristic of the antenna is achieved by asymmetric slot in the ground plane. A compact multilayer FSS is designed to achieve the UWB performance. A significant improvement in the peak gain value of antenna is obtained in low profile design, while maintaining the excellent impedance bandwidth of ultra wide band antenna. The average peak gain of antenna is increased from 4 dBi to 7 dBi as a result of FSS superstrate as a reflector. The average peak gain variation in the operating frequency range of antenna (2.5 GHz-14 GHz) is only 1-2 dB, which is a significant improvement over the gain variation of 3 to 4 dB for antenna alone system without using FSS. The most attractive feature of the design is that, it maintains compactness in the geometry along with all other features. This compact, optimized FSS reflector provide flexibility to the design to mount on any antenna situated closer to conducting bodies, example metal sheet, screen and cases.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"91 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116300250","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: 14
A miniaturized wide band microwave amplitude equalizer 一种小型化宽带微波幅度均衡器
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7039016
D. Packiaraj, M. Ramesh
{"title":"A miniaturized wide band microwave amplitude equalizer","authors":"D. Packiaraj, M. Ramesh","doi":"10.1109/IMARC.2014.7039016","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039016","url":null,"abstract":"This paper reports the design of a miniaturized microwave amplitude equalizer working over a wide range of frequencies. A positive slope equalizer is designed using broadside coupled lines along with cross coupling between input and output ports. Based on this proposed structure, wideband positive slope equalizer working over 1GHz to 18GHz has been analyzed and designed. The equalizer performance was analytically computed based on circuit models and compared against the full wave simulations. The proposed equalizer has been manufactured and measured. Measured results are presented in this paper. The equalizer has positive gain slope (-7.5dB to -1.5dB) from 1GHz to 18GHz. The Size of the miniaturized wide band equalizer is 20mm×10mm×10mm.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124341978","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: 11
Circularly polarized active antenna array for telemetry reception 遥测接收用圆极化有源天线阵列
2014 IEEE International Microwave and RF Conference (IMaRC) Pub Date : 2014-12-01 DOI: 10.1109/IMARC.2014.7039028
P. Mishra, D. Jahagirdar, G. Kumar
{"title":"Circularly polarized active antenna array for telemetry reception","authors":"P. Mishra, D. Jahagirdar, G. Kumar","doi":"10.1109/IMARC.2014.7039028","DOIUrl":"https://doi.org/10.1109/IMARC.2014.7039028","url":null,"abstract":"In this paper, a novel design of 4×1 broadband circularly polarized active antenna array is proposed for telemetry signal reception. The antenna array is designed using electromagnetically coupled microstrip radiating elements and consists of bias tee and low noise amplifier. The 4×1 antenna array has broad VSWR <; 2 bandwidth of 9.5% and axial ratio <; 6 dB bandwidth of 7.5% at 2.2 GHz. The 4×1 array with LNA has maximum gain of 43.5 dBic and gain flatness of 1 dB.","PeriodicalId":424355,"journal":{"name":"2014 IEEE International Microwave and RF Conference (IMaRC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132741823","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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