Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673345
W. Lu, R. Mauriello, K. Sundaram, L. Chow
The development of the power MOSFET allows an electronic circuit designer greater flexibility in high power switching applications. This experiment demonstrates that the on-resistance of a power MOSFET decreases significantly when the operating temperature decreases. A comparison of on-resistance is then generated at 77 K, 173 K, 243 K and 295 K to show the effect of cryogenic cooling.
{"title":"Comparison of on-resistance of a power MOSFET by varying temperature","authors":"W. Lu, R. Mauriello, K. Sundaram, L. Chow","doi":"10.1109/SECON.1998.673345","DOIUrl":"https://doi.org/10.1109/SECON.1998.673345","url":null,"abstract":"The development of the power MOSFET allows an electronic circuit designer greater flexibility in high power switching applications. This experiment demonstrates that the on-resistance of a power MOSFET decreases significantly when the operating temperature decreases. A comparison of on-resistance is then generated at 77 K, 173 K, 243 K and 295 K to show the effect of cryogenic cooling.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126838554","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673323
M. Faiz, P. Wahid
A normal mode helical antenna was designed to operate at 900 MHz. The input impedance of the helix was matched through a microstrip line of a quarter wavelength long. The antenna was simulated with an infinite ground plane. An axial wire between the helix and the microstrip line was introduced in order to reduce the coupling and an end wire to vary the input impedance to a value desired for a narrow microstrip line. The overall performance is presented.
{"title":"Microstrip line matched normal mode helical antenna for cellular communication","authors":"M. Faiz, P. Wahid","doi":"10.1109/SECON.1998.673323","DOIUrl":"https://doi.org/10.1109/SECON.1998.673323","url":null,"abstract":"A normal mode helical antenna was designed to operate at 900 MHz. The input impedance of the helix was matched through a microstrip line of a quarter wavelength long. The antenna was simulated with an infinite ground plane. An axial wire between the helix and the microstrip line was introduced in order to reduce the coupling and an end wire to vary the input impedance to a value desired for a narrow microstrip line. The overall performance is presented.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124261228","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673376
S. Wunnava
It is not an exaggeration to say that using the Internet and World Wide Web have become common household activities. While the end users do not care how the information gets transferred between end points on a global network, system designers, software and hardware developers, and network managers need to be concerned about the packet based information transfers between the end points. There is a great need to know about how the packets are moving on the network, their relative time responses as the packets travel towards the destination station, and the IP (Internet Protocol) addresses of the intermediate nodes, to qualify the data transfers. Unix and the Windows based platforms are very popular for the Web and Internet related information transfer activities. The authors discuss some popular and very useful connectivity commands which will help the users to monitor the network behavior and show practical case studies of how these can be used to monitor the data transfers and the time involvement.
{"title":"How to monitor packet transfers on global network","authors":"S. Wunnava","doi":"10.1109/SECON.1998.673376","DOIUrl":"https://doi.org/10.1109/SECON.1998.673376","url":null,"abstract":"It is not an exaggeration to say that using the Internet and World Wide Web have become common household activities. While the end users do not care how the information gets transferred between end points on a global network, system designers, software and hardware developers, and network managers need to be concerned about the packet based information transfers between the end points. There is a great need to know about how the packets are moving on the network, their relative time responses as the packets travel towards the destination station, and the IP (Internet Protocol) addresses of the intermediate nodes, to qualify the data transfers. Unix and the Windows based platforms are very popular for the Web and Internet related information transfer activities. The authors discuss some popular and very useful connectivity commands which will help the users to monitor the network behavior and show practical case studies of how these can be used to monitor the data transfers and the time involvement.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121522895","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673298
M. Kar, P. Wahid
The finite difference time domain (FDTD) method is used for the analysis of a square microstrip patch antenna with two microstrip feed lines. Circular polarization is obtained by feeding the lines on adjacent sides of the antenna with Gaussian pulses that are 90/spl deg/ out of phase. The tuning characteristics of the antenna using two feed lines on opposite sides are presented.
{"title":"The FDTD analysis of a microstrip patch antenna with dual feed lines","authors":"M. Kar, P. Wahid","doi":"10.1109/SECON.1998.673298","DOIUrl":"https://doi.org/10.1109/SECON.1998.673298","url":null,"abstract":"The finite difference time domain (FDTD) method is used for the analysis of a square microstrip patch antenna with two microstrip feed lines. Circular polarization is obtained by feeding the lines on adjacent sides of the antenna with Gaussian pulses that are 90/spl deg/ out of phase. The tuning characteristics of the antenna using two feed lines on opposite sides are presented.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117258101","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673315
Zhi-Ming Lin
We introduce a vehicular automation system to promote a bus service. The system provides two kinds of services to passengers. One is a voice announcing service. The other is an LED matrix display service. The voice announcing service reminds the passengers of the newly approaching station. The LED matrix not only displays the name of the station but also displays the driving status of the bus so that the passengers have more time to prepare for disembarking at the station. The combination of these two services makes the system more user friendly.
{"title":"A convenient vehicular automation system in promoting bus services","authors":"Zhi-Ming Lin","doi":"10.1109/SECON.1998.673315","DOIUrl":"https://doi.org/10.1109/SECON.1998.673315","url":null,"abstract":"We introduce a vehicular automation system to promote a bus service. The system provides two kinds of services to passengers. One is a voice announcing service. The other is an LED matrix display service. The voice announcing service reminds the passengers of the newly approaching station. The LED matrix not only displays the name of the station but also displays the driving status of the bus so that the passengers have more time to prepare for disembarking at the station. The combination of these two services makes the system more user friendly.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123050864","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673318
M. M. Mahin, J. Yuan, A. Whittakar, M. Chian, K. Ports
In this paper, we investigate the substrate noise coupling in the mixed-signal IC and its effect on the analog/digital circuits. A proper simulation technique for mixed-signal circuits in SPICE, operating at high speeds and high frequencies, is developed.
{"title":"Substrate noise coupling in mixed-signal ICs","authors":"M. M. Mahin, J. Yuan, A. Whittakar, M. Chian, K. Ports","doi":"10.1109/SECON.1998.673318","DOIUrl":"https://doi.org/10.1109/SECON.1998.673318","url":null,"abstract":"In this paper, we investigate the substrate noise coupling in the mixed-signal IC and its effect on the analog/digital circuits. A proper simulation technique for mixed-signal circuits in SPICE, operating at high speeds and high frequencies, is developed.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129588184","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673296
M.A. Kolbehdari, M. Sadiku
This paper describes a H(curl) conforming finite element method in the frequency domain and an efficient model-reduction method for the modeling of computational electromagnetic applications. The field equations are formulated using the Laplace-domain tangential vector finite element method and are reduced to lower-order models using the complex frequency hopping (CFH) technique. The CFH is a moment matching technique which has been used successfully in circuit simulation for the solution of large sets of ordinary differential equations. The proposed technique is faster than the conventional approach by one to three orders of magnitude. The accuracy and computational efficiency of the algorithm are discussed and illustrative examples are presented for cavity resonators and stripline.
{"title":"H(curl) elements and model-reduction method for electromagnetic problems","authors":"M.A. Kolbehdari, M. Sadiku","doi":"10.1109/SECON.1998.673296","DOIUrl":"https://doi.org/10.1109/SECON.1998.673296","url":null,"abstract":"This paper describes a H(curl) conforming finite element method in the frequency domain and an efficient model-reduction method for the modeling of computational electromagnetic applications. The field equations are formulated using the Laplace-domain tangential vector finite element method and are reduced to lower-order models using the complex frequency hopping (CFH) technique. The CFH is a moment matching technique which has been used successfully in circuit simulation for the solution of large sets of ordinary differential equations. The proposed technique is faster than the conventional approach by one to three orders of magnitude. The accuracy and computational efficiency of the algorithm are discussed and illustrative examples are presented for cavity resonators and stripline.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116996735","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673362
S. Alhumaidi, W. Linwood Jones, F. Syed, V. Devan, K. Shaw, R.A. Brown
Satellite microwave scatterometer systems have been successfully used to remotely sense ocean surface wind vectors. Future systems will use small conical scanning antennas to sample the ocean surface. This paper describes a computer simulation to generate radar measurements of ocean backscatter and to retrieve ocean winds. Application of this simulation to active remote sensor development at the Raytheon Systems Company St. Petersburg is presented.
{"title":"Conical scanning microwave scatterometer geophysical performance simulation","authors":"S. Alhumaidi, W. Linwood Jones, F. Syed, V. Devan, K. Shaw, R.A. Brown","doi":"10.1109/SECON.1998.673362","DOIUrl":"https://doi.org/10.1109/SECON.1998.673362","url":null,"abstract":"Satellite microwave scatterometer systems have been successfully used to remotely sense ocean surface wind vectors. Future systems will use small conical scanning antennas to sample the ocean surface. This paper describes a computer simulation to generate radar measurements of ocean backscatter and to retrieve ocean winds. Application of this simulation to active remote sensor development at the Raytheon Systems Company St. Petersburg is presented.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126627114","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673325
G. Bonagnide, J. Sherman, L. Dunleavy
If the dominant-mode waveguide impedance (Z) and cutoff frequency (f/sub c/) can be determined, an equivalent lumped-element model can be developed to simulate a waveguide's electrical properties within the frequency band of interest. This approach allows conventional linear simulation tools to be used to analyze the performance of circuits employing waveguide components, and is demonstrated in the design of a C-band evanescent-mode waveguide filter using a double-ridge waveguide.
{"title":"A lumped-element modeling approach for waveguide of arbitrary geometry","authors":"G. Bonagnide, J. Sherman, L. Dunleavy","doi":"10.1109/SECON.1998.673325","DOIUrl":"https://doi.org/10.1109/SECON.1998.673325","url":null,"abstract":"If the dominant-mode waveguide impedance (Z) and cutoff frequency (f/sub c/) can be determined, an equivalent lumped-element model can be developed to simulate a waveguide's electrical properties within the frequency band of interest. This approach allows conventional linear simulation tools to be used to analyze the performance of circuits employing waveguide components, and is demonstrated in the design of a C-band evanescent-mode waveguide filter using a double-ridge waveguide.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":" May","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131976254","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}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673295
M. Kolbehdari, M. Sadiku
This paper describes the time domain finite element methods based on p-forms of Whiteny (1957) edge and facet elements. The finite element methods are used in modeling homogeneous and non-homogeneous structures arising in computational electromagnetic applications. The time-harmonic electromagnetic fields differential equations are discretized in the spatial domain by the p-forms of Whiteny elements and in the time domain by the finite difference schemes. The finite element time domain equations are reduced to explicit and implicit differential equations which are solved using the leapfrog and Newmark schemes. The accuracy and computational efficiency of the algorithms are discussed and illustrative example is presented for an EM problem.
{"title":"Explicit and implicit time domain finite element methods using Whiteny forms","authors":"M. Kolbehdari, M. Sadiku","doi":"10.1109/SECON.1998.673295","DOIUrl":"https://doi.org/10.1109/SECON.1998.673295","url":null,"abstract":"This paper describes the time domain finite element methods based on p-forms of Whiteny (1957) edge and facet elements. The finite element methods are used in modeling homogeneous and non-homogeneous structures arising in computational electromagnetic applications. The time-harmonic electromagnetic fields differential equations are discretized in the spatial domain by the p-forms of Whiteny elements and in the time domain by the finite difference schemes. The finite element time domain equations are reduced to explicit and implicit differential equations which are solved using the leapfrog and Newmark schemes. The accuracy and computational efficiency of the algorithms are discussed and illustrative example is presented for an EM problem.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133520350","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}
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