Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6238008
C. Hoffmann, H. H. Slim, P. Russer
In this paper, a time-domain measurement system for EMI measurements according to CISPR 16-1-1, MIL-461 and DO-160 in the frequency range from 10 Hz-40 GHz is presented. Signals with a frequency of up to 1.1 GHz are sampled by an ultra-fast floating-point analog-to-digital-converter (ADC), whereas signals from 1.1-40 GHz are first down-converted by an ultra-broadband multi-stage down-converter. With integrated preamplifiers, the system offers high sensitivity and maintains a low system noise floor of below 20 dBμV at 1 MHz IF-bandwidth up to 40 GHz. With a high system dynamic range of more than 70 dB, the system is well suited for the measurement of broadband, transient emissions. Non-stationary emissions can be measured via the real-time spectrogram or via the multi-channel amplitude probability distribution (APD) measuring method.
{"title":"A time-domain system for the measurement of non-stationary EMI up to 40 GHz","authors":"C. Hoffmann, H. H. Slim, P. Russer","doi":"10.1109/APEMC.2012.6238008","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238008","url":null,"abstract":"In this paper, a time-domain measurement system for EMI measurements according to CISPR 16-1-1, MIL-461 and DO-160 in the frequency range from 10 Hz-40 GHz is presented. Signals with a frequency of up to 1.1 GHz are sampled by an ultra-fast floating-point analog-to-digital-converter (ADC), whereas signals from 1.1-40 GHz are first down-converted by an ultra-broadband multi-stage down-converter. With integrated preamplifiers, the system offers high sensitivity and maintains a low system noise floor of below 20 dBμV at 1 MHz IF-bandwidth up to 40 GHz. With a high system dynamic range of more than 70 dB, the system is well suited for the measurement of broadband, transient emissions. Non-stationary emissions can be measured via the real-time spectrogram or via the multi-channel amplitude probability distribution (APD) measuring method.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115391293","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6238024
J. Luszcz, R. Smoleński
This paper presents the investigation results of voltage harmonic transfer accuracy problems through voltage transformers which are widely used in power quality monitoring systems in medium and high voltage grids. A simplified lumped parameters circuit model of the voltage transformer is presented and verified by simulation and experimental investigations. A number voltage transformers typically used in medium voltage grid has been tested in the conducted electromagnetic interference frequency range up to 30 MHz. The obtained results confirm that broadband voltage transfer function of the voltage transformer usually exhibits various irregularities which are primarily associated with voltage transformer winding parasitic capacitances.
{"title":"Voltage harmonic distortion measurement issue in smart-grid distribution system","authors":"J. Luszcz, R. Smoleński","doi":"10.1109/APEMC.2012.6238024","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238024","url":null,"abstract":"This paper presents the investigation results of voltage harmonic transfer accuracy problems through voltage transformers which are widely used in power quality monitoring systems in medium and high voltage grids. A simplified lumped parameters circuit model of the voltage transformer is presented and verified by simulation and experimental investigations. A number voltage transformers typically used in medium voltage grid has been tested in the conducted electromagnetic interference frequency range up to 30 MHz. The obtained results confirm that broadband voltage transfer function of the voltage transformer usually exhibits various irregularities which are primarily associated with voltage transformer winding parasitic capacitances.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"376 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126719406","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237872
M. Ali, H. Jaafar, S. Subahir, A. L. Yusof
This paper concerned on enhancement of gain for microstrip patch planar array antenna. The structure in this project is 2 by 2 microstrip patch planar array antenna using air substrate with εr= 1at frequency 5.8 GHz. Frequency for 5.8GHz can be applied to unlicensed WiMAX. In this project, the simulation is performed by using the simulation software Computer Simulation Technology (CST) Microwave Studiowhich is a commercially available electromagnetic simulator based on finite difference time domain technique. The novelty of the design is the application of air to replace regular Flame Retardant 4 (FR-4) materials as the substrate.The substrate used for the design is C-foam (thickness = 3mm) which represent as air gap. Copper foil with thickness 0.12mm is used as the patch. The performance of the designed antenna was analyzed in term of bandwidth, gain, return loss, VSWR, and radiation pattern.
{"title":"Gain enhancement of air substrates at 5.8GHz for microstrip antenna array","authors":"M. Ali, H. Jaafar, S. Subahir, A. L. Yusof","doi":"10.1109/APEMC.2012.6237872","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237872","url":null,"abstract":"This paper concerned on enhancement of gain for microstrip patch planar array antenna. The structure in this project is 2 by 2 microstrip patch planar array antenna using air substrate with εr= 1at frequency 5.8 GHz. Frequency for 5.8GHz can be applied to unlicensed WiMAX. In this project, the simulation is performed by using the simulation software Computer Simulation Technology (CST) Microwave Studiowhich is a commercially available electromagnetic simulator based on finite difference time domain technique. The novelty of the design is the application of air to replace regular Flame Retardant 4 (FR-4) materials as the substrate.The substrate used for the design is C-foam (thickness = 3mm) which represent as air gap. Copper foil with thickness 0.12mm is used as the patch. The performance of the designed antenna was analyzed in term of bandwidth, gain, return loss, VSWR, and radiation pattern.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116070259","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237805
Z. Kordiboroujeni, Jens Bornemann, T. Sieverding
A mode-matching based full-wave analysis method is deployed to design H-plane substrate integrated waveguide (SIW) couplers. In order to apply simple and straightforward mode-matching techniques, commonly used circular vias are replaced by proper square ones. K-band and W-band SIW directional couplers are designed with square vias, and then analyzed and validated by commercially available full-wave field solvers using circular vias. Comparisons with measurements on a Ka-band SIW coupler with circular vias verify the analysis and design procedure.
{"title":"Mode-matching design of substrate-integrated waveguide couplers","authors":"Z. Kordiboroujeni, Jens Bornemann, T. Sieverding","doi":"10.1109/APEMC.2012.6237805","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237805","url":null,"abstract":"A mode-matching based full-wave analysis method is deployed to design H-plane substrate integrated waveguide (SIW) couplers. In order to apply simple and straightforward mode-matching techniques, commonly used circular vias are replaced by proper square ones. K-band and W-band SIW directional couplers are designed with square vias, and then analyzed and validated by commercially available full-wave field solvers using circular vias. Comparisons with measurements on a Ka-band SIW coupler with circular vias verify the analysis and design procedure.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122487036","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237917
A. D’Aloia, A. Tamburrano, M. D'amore, M. S. Sarto
The use of novel nanocomposites, consisting in polymeric-based system filled with graphite-nanoplatelets (GNP), is proposed to increase the shielding performance and to reduce the Q of small enclosures excited by impinging plane waves in the gigahertz frequency range. Structure and electrical characteristics of the realized GNP-based composites are described. Absorbing performances of a planar infinite screen made with two layers panel backed on a metallic surface, illuminated by a TM and a TE polarized plane waves, are computed in reverberating conditions. The same absorbing nanostructure is considered to realize the walls of a small-dimensions cubic box with a slot aperture. The full-wave numerical simulations demonstrate that the use of the new material produces resonance damping of microwave electric field and a factor 104 reduction of the Q of a full-metallic enclosure.
{"title":"Graphite nano-platelet-based composites for microwave absorbing small enclosures","authors":"A. D’Aloia, A. Tamburrano, M. D'amore, M. S. Sarto","doi":"10.1109/APEMC.2012.6237917","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237917","url":null,"abstract":"The use of novel nanocomposites, consisting in polymeric-based system filled with graphite-nanoplatelets (GNP), is proposed to increase the shielding performance and to reduce the Q of small enclosures excited by impinging plane waves in the gigahertz frequency range. Structure and electrical characteristics of the realized GNP-based composites are described. Absorbing performances of a planar infinite screen made with two layers panel backed on a metallic surface, illuminated by a TM and a TE polarized plane waves, are computed in reverberating conditions. The same absorbing nanostructure is considered to realize the walls of a small-dimensions cubic box with a slot aperture. The full-wave numerical simulations demonstrate that the use of the new material produces resonance damping of microwave electric field and a factor 104 reduction of the Q of a full-metallic enclosure.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128605438","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237852
S. Yee, A. Sayegh, A. Kazemipour, M. Jenu
A wideband TEM-cell is designed for dielectric measurements to operate over a 50 MHz - 800 MHz frequency range by using transmission/reflection method. This cell is compact, easy to fabricate, and useful for measuring porous samples such as concrete. The classic dielectric measurement setup is usually based on rectangular TE10-mode waveguides which become very large, expensive, and non-practical for lower frequencies. As for a classic coaxial cell, non-uniformity of the electromagnetic field and the difficulty to obtain sample in a toroidal shape for coaxial cells are overcome using the proposed TEM-cell. Wideband matching is performed using a coaxial to waveguide connector based on a tapering technique. A specific calibration is used and the complex permittivity and permeability are calculated from the measured S-parameters. Preliminary experimental results are presented.
{"title":"Design and calibration of a wideband TEM-cell for material characterization","authors":"S. Yee, A. Sayegh, A. Kazemipour, M. Jenu","doi":"10.1109/APEMC.2012.6237852","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237852","url":null,"abstract":"A wideband TEM-cell is designed for dielectric measurements to operate over a 50 MHz - 800 MHz frequency range by using transmission/reflection method. This cell is compact, easy to fabricate, and useful for measuring porous samples such as concrete. The classic dielectric measurement setup is usually based on rectangular TE10-mode waveguides which become very large, expensive, and non-practical for lower frequencies. As for a classic coaxial cell, non-uniformity of the electromagnetic field and the difficulty to obtain sample in a toroidal shape for coaxial cells are overcome using the proposed TEM-cell. Wideband matching is performed using a coaxial to waveguide connector based on a tapering technique. A specific calibration is used and the complex permittivity and permeability are calculated from the measured S-parameters. Preliminary experimental results are presented.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129002184","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237962
Kangrong Li, K. See, Weishan Soh
With rapidly growing circuit density and the demand for low power supply to ICs in high-speed printed circuit board (PCB) design, board emission issues tend to seriously deteriorate the power distribution network (PDN) on PCBs. Among a variety of proposed PDN designs and guidelines, the use of edge-mounted capacitors to suppress board emissions is validated by measurements. The results demonstrated that the edge-mounted capacitors can effectively reduce the board edge emissions from a few MHz to 1 GHz. It is believed that the capacitors' inherent equivalent series inductance (ESL) limits the suppression of PDN impedance and board emissions above 1 GHz. In this paper, the impact of ESL on the board emissions will be analyzed. Simulation results show that the ESL of the edge-mounted capacitors of a few nH still provide a low PDN impedance for the power/ground plane pair. For ESL of a few uH or larger, the capacitors cannot effectively suppress the emissions and radiation. In addition, larger ESL will bring down the first board resonant frequency of the PDN impedance from above 1 GHz to few hundred MHz. Hence, a narrower frequency band with low PDN impedance.
{"title":"Study of impact of equivalent series inductance on high-speed board emissions","authors":"Kangrong Li, K. See, Weishan Soh","doi":"10.1109/APEMC.2012.6237962","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237962","url":null,"abstract":"With rapidly growing circuit density and the demand for low power supply to ICs in high-speed printed circuit board (PCB) design, board emission issues tend to seriously deteriorate the power distribution network (PDN) on PCBs. Among a variety of proposed PDN designs and guidelines, the use of edge-mounted capacitors to suppress board emissions is validated by measurements. The results demonstrated that the edge-mounted capacitors can effectively reduce the board edge emissions from a few MHz to 1 GHz. It is believed that the capacitors' inherent equivalent series inductance (ESL) limits the suppression of PDN impedance and board emissions above 1 GHz. In this paper, the impact of ESL on the board emissions will be analyzed. Simulation results show that the ESL of the edge-mounted capacitors of a few nH still provide a low PDN impedance for the power/ground plane pair. For ESL of a few uH or larger, the capacitors cannot effectively suppress the emissions and radiation. In addition, larger ESL will bring down the first board resonant frequency of the PDN impedance from above 1 GHz to few hundred MHz. Hence, a narrower frequency band with low PDN impedance.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129837751","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237804
Y. Shan, Ping Li, Junhong Deng
Various materials for shielding against electromagnetic radiation have been rapidly developed to protect the operational environment and prevent interference. Reliable measurement is required to determine and evaluate the material properties. In this paper, the characterization methods for planar material sample fixtures are first presented in both the time domain using oscilloscope time domain reflectometry (TDR) and vector network analyser TDR methods, and the frequency domain using a vector network analyser (VNA). Then the application of the characterised planar material sample fixtures are described for the measurement of EMI shielding effectiveness of carbon nanotubes based coatings.
{"title":"Planar material sample fixture characterization and application for EMI shielding effectiveness evaluations","authors":"Y. Shan, Ping Li, Junhong Deng","doi":"10.1109/APEMC.2012.6237804","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237804","url":null,"abstract":"Various materials for shielding against electromagnetic radiation have been rapidly developed to protect the operational environment and prevent interference. Reliable measurement is required to determine and evaluate the material properties. In this paper, the characterization methods for planar material sample fixtures are first presented in both the time domain using oscilloscope time domain reflectometry (TDR) and vector network analyser TDR methods, and the frequency domain using a vector network analyser (VNA). Then the application of the characterised planar material sample fixtures are described for the measurement of EMI shielding effectiveness of carbon nanotubes based coatings.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"407 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123203408","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237996
M. Jusoh, M. Faizal, M. Malek, M. Kamarudin, M. Hamid
A reconfigurable beam shape patch antenna (RBS-PA) is proposed in this paper. The RBS-PA antenna which consists of two rectangular elements is fed by a 50Ω microstrip feed line. A feed network technique is implementing to combine both radiating elements. The PIN diode switch is positioned at the transmission line at the ideal location. The activation of certain PIN diode switches configuration would then determine the beam shape angle and main lobe magnitude (dB). The RBS-PA is capable of shaped its radiated beam to 9.9dB and 6.7dB. All design and simulations have been carried out using CST Microwave Studio. This antenna is a promising candidate to be installed for a WiFi and WiMAX smart antenna system.
{"title":"A reconfigurable beam shape patch array antenna (RBS-PA) for WiMAX and WiFi applications","authors":"M. Jusoh, M. Faizal, M. Malek, M. Kamarudin, M. Hamid","doi":"10.1109/APEMC.2012.6237996","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237996","url":null,"abstract":"A reconfigurable beam shape patch antenna (RBS-PA) is proposed in this paper. The RBS-PA antenna which consists of two rectangular elements is fed by a 50Ω microstrip feed line. A feed network technique is implementing to combine both radiating elements. The PIN diode switch is positioned at the transmission line at the ideal location. The activation of certain PIN diode switches configuration would then determine the beam shape angle and main lobe magnitude (dB). The RBS-PA is capable of shaped its radiated beam to 9.9dB and 6.7dB. All design and simulations have been carried out using CST Microwave Studio. This antenna is a promising candidate to be installed for a WiFi and WiMAX smart antenna system.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114350460","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237967
J. Mclean, R. Sutton
Inductive wireless power transfer is examined from the standpoint of electromagnetic compatibility with near-field inductive RFID devices. Some conclusions are drawn concerning the minimum distance that must exist between such devices. In particular we examine RFID transponders for domestic and ruminant animals and consider the possibly that such animals could come into very close proximity to wireless vehicular battery charging systems.
{"title":"The electromagnetic compatibility of wireless inductive automotive battery chargers and LF animal RFID tags","authors":"J. Mclean, R. Sutton","doi":"10.1109/APEMC.2012.6237967","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237967","url":null,"abstract":"Inductive wireless power transfer is examined from the standpoint of electromagnetic compatibility with near-field inductive RFID devices. Some conclusions are drawn concerning the minimum distance that must exist between such devices. In particular we examine RFID transponders for domestic and ruminant animals and consider the possibly that such animals could come into very close proximity to wireless vehicular battery charging systems.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126296804","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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