2009 Electromagnetic Compatibility Symposium Adelaide最新文献_第2页

Optimal design of multifunctional transparent shields against radio frequency electromagnetic fields 射频电磁场多功能透明屏蔽的优化设计

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349770

M. D'amore, D. A. Lampasi, M. S. Sarto, A. Tamburrano, V. De Santis, M. Feliziani

引用次数: 6

Estimating uncertainty in calculated ambient RF field levels for hazard assessments 估算计算环境射频场水平的不确定性，用于危害评估

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349769

V. Anderson

{"title":"Estimating uncertainty in calculated ambient RF field levels for hazard assessments","authors":"V. Anderson","doi":"10.1109/EMCSA.2009.5349769","DOIUrl":"https://doi.org/10.1109/EMCSA.2009.5349769","url":null,"abstract":"Just as for measured evaluations, the calculation of ambient levels of radiofrequency (RF) electric and magnetic fields for hazard assessments can entail random uncertainty, the extent of which depends on: how well the method of analysis approximates the governing electromagnetic equations (i.e. Maxwell's equations); how closely the modeled object represents its real counterpart in form and composition, and; computational round off error. While uncertainty estimates are commonly required for RF measurements, they are rarely provided for calculated assessments. In this paper, a process for calculating uncertainty for calculated assessments is proposed. It incorporates a series of validation tests which are used to gauge the uncertainty in the computational technique and round off error. The comparator in the validation tests must be independent of the technique (e.g. measurement of antenna gain) and may vary for different types of analyses (e.g. full wave solutions vs ray tracing methods). Variational targets are set for the validation tests, and the uncertainty estimate for computational uncertainty diminishes as more tests are passed. Once determined in this way, the standard uncertainty for computational technique is then combined in a multiplicative model with standard uncertainties for other influence quantities such as forward power to the antenna and field scattering effects of nearby objects. By using the proposed approach, it will be possible to provide systematic corrections and uncertainty estimates for calculated assessments as they are for RF measurements, thereby allowing meaningful comparisons between them.","PeriodicalId":129073,"journal":{"name":"2009 Electromagnetic Compatibility Symposium Adelaide","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129249612","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

Co-site interference between wideband receiver and switching power supply 宽带接收机与开关电源的共址干扰

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349779

I. Coat

{"title":"Co-site interference between wideband receiver and switching power supply","authors":"I. Coat","doi":"10.1109/EMCSA.2009.5349779","DOIUrl":"https://doi.org/10.1109/EMCSA.2009.5349779","url":null,"abstract":"This technique was developed to support a technical risk analysis to determine the likelihood of interference between a noisy RF source and a sensitive radio receiver. This paper analyses the worst case conditions for co-site radiated interference between a switched mode power supply certified to MIL-STD-461B and a wideband radio receiver system. The analysis suggests that despite the application of MIL-STD-461 and a RF isolation sub-chassis for the sensitive RF receiver elements, there remains a risk that the system noise floor and hence the minimum discernible signal level will be affected by the nearby high power switched mode power supply. This paper only addresses theoretical performance and the result highlights the need for testing of the components to identify whether further interference mitigation measures are required as part of the installation package. Unfortunately, neither candidate receiver or power supply elements were available for testing prior to this drafting of this paper. This paper discusses the radiated emissions aspects of MIL-STD-461. The conducted emissions (passed along the power and control lines) are likely to be more significant than radiated emissions, but may be manageable through the suitable application of in-line filters. Careful consideration should also be given to radiated emissions from the wires leading into the power supply. These lines may also require filtering.","PeriodicalId":129073,"journal":{"name":"2009 Electromagnetic Compatibility Symposium Adelaide","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128596086","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

Closed-loop inductive link for wireless powering of a high density electrode array retinal prosthesis 用于高密度电极阵列视网膜假体无线供电的闭环感应链路

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349767

D. Ng, G. Felic, E. Skafidas, S. Bai

{"title":"Closed-loop inductive link for wireless powering of a high density electrode array retinal prosthesis","authors":"D. Ng, G. Felic, E. Skafidas, S. Bai","doi":"10.1109/EMCSA.2009.5349767","DOIUrl":"https://doi.org/10.1109/EMCSA.2009.5349767","url":null,"abstract":"A retinal prosthesis intended for rehabilitation of vision impaired patients will require continuous power supply in order to achieve real-time moving images. In this work, we explore the use of inductive coils fabricated using flexible circuit technologies for inductive powering of the implanted prosthetic device. We found that manufacturing technologies dictate the optimum operating frequency of the coil. For a minimum track width and spacing of 4 mils, the optimum frequency was found to be 2.9 MHz. We also looked at the distribution of electric and magnetic fields generated by the inductive coils in and surrounding the eye. These simulation results show that there are electric field concentrations around the conductive coils. Apart from the coils, we need to design an efficient circuit to drive the transmit coil and recover the transmitted power. In order to maintain optimal operation of the link, a closed-loop load modulation feedback operation is proposed. Adaptive control using back-telemetry of the induced voltage on the secondary side can close the power supply loop and result in optimum power transfer by boosting the supply voltage on the primary side when load is high and reducing this voltage when load is small.","PeriodicalId":129073,"journal":{"name":"2009 Electromagnetic Compatibility Symposium Adelaide","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124540292","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

An EMI analysis modelling method for electro-optical/infrared systems 电光/红外系统的电磁干扰分析建模方法

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349763

G. Dall'Armi-Stoks

引用次数: 0

Application of geometrical matrix recycling method (GMRM) in numerical field calculation 几何矩阵循环法(GMRM)在数值计算中的应用

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349766

N. Baganz, D. Plettemeier, M. Wood, K. Gonschorek

引用次数: 0

EMI issues in high power and high level diode-clamped converters 高功率和高电平二极管箝位变换器中的电磁干扰问题

2009 Electromagnetic Compatibility Symposium Adelaide Pub Date : 2009-12-08 DOI: 10.1109/EMCSA.2009.5349772

A. Nami, Firuz Zare, A. Ghosh

引用次数: 2