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2007 Asia-Pacific Conference on Applied Electromagnetics最新文献

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Small rectangular parasitic plane as patch antenna ground plane for broadband WLAN application 小矩形寄生平面作为贴片天线接地面用于宽带WLAN应用
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603962
S. R. Norra, A. Azremi, P. Soh, N. A. Saidatul, M. I. Ibrahim
{"title":"Small rectangular parasitic plane as patch antenna ground plane for broadband WLAN application","authors":"S. R. Norra, A. Azremi, P. Soh, N. A. Saidatul, M. I. Ibrahim","doi":"10.1109/APACE.2007.4603962","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603962","url":null,"abstract":"This paper proposed a microstrip patch antenna for broadband WLAN application. The antenna is based on an octagonal patch, which is simulated and analyzed by using Microwave Office (MWO) for WLAN applications. The designed antenna exhibited a broad 230 MHz bandwidth, by using a small parasitic plane as the ground plane. Specification of this antenna, printed over a thin FR4 substrate of dielectric constant epsivr = 4.7, tandelta = 0.019 and thickness, h = 1.6 mm Details of the proposed antenna design and simulation results for WLAN operations in the 2.4 GHz bands are presented and discussed.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131872539","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: 5
Application of radio-over-fiber (ROF) in mobile communication 光纤无线电(ROF)在移动通信中的应用
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603945
R. Abdolee, R. Ngah, V. Vakilian, T. A. Rahman
{"title":"Application of radio-over-fiber (ROF) in mobile communication","authors":"R. Abdolee, R. Ngah, V. Vakilian, T. A. Rahman","doi":"10.1109/APACE.2007.4603945","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603945","url":null,"abstract":"Future generation of mobile communication system must be capable of serving high quality and broadband services even in highly dense populated area. The radio-over-fibre is one of the promising systems which can be used along the emerging wireless technologies such as smart antenna or multiple input multiple output (MIMO) systems to meet these requirements. In this paper, the role of ROF technology in next generation of mobile communication system is presented, and then the concept is clearly interpreted. Then, base on previous research and finding, a probable ROF architecture for present and future wireless mobile communication is portrayed. Along this, challenges and development issues of ROF technology are presented as well.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134448689","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: 20
Comparison study of Distributed Raman Amplifier gain characteristics on CWDM band by employing SMF, NZDF, DCF, & DSF based on numerical simulation 基于数值模拟的SMF、NZDF、DCF和DSF在CWDM频段的分布式拉曼放大器增益特性比较研究
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603930
V. Repi, U. Darusalam, P. Priambodo
{"title":"Comparison study of Distributed Raman Amplifier gain characteristics on CWDM band by employing SMF, NZDF, DCF, & DSF based on numerical simulation","authors":"V. Repi, U. Darusalam, P. Priambodo","doi":"10.1109/APACE.2007.4603930","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603930","url":null,"abstract":"On this preliminary work we employ distributed raman amplifier with pumping schemes are forward- & backward pumping on SMF. The model of simulation and analysis used are multiple-pump interactions on CWDM band. We used four level configuration of pumps on wavelengths; 1435 nm, 1445 nm, 1455 nm and 1465 nm with the range of tuneable power levels are 300 mWatt - 400 mWatt each ones. The average results of Stokes gain measured at L = 0 km and L = 40 km are 17.875 B and -3.5 dB respectively while the noise figure is at the range of 3 dB - 2.5 dB. The maximum length of fiber are reach at L = ~50 km. Two factors found that could decreasing the performances of distributed Raman amplifier are amplified spontaneous scattering (ASS) and Rayleigh backscattering effects. Finally the flattening gains for C band are reached successfully.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126994979","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
5.75 GHz microstrip bandpass filter for ISM band 5.75 GHz微带带通滤波器，用于ISM频段
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603952
A. R. Othman, I. Ibrahim, M. Selamat, M. Samingan, A. Aziz, H. Halim
{"title":"5.75 GHz microstrip bandpass filter for ISM band","authors":"A. R. Othman, I. Ibrahim, M. Selamat, M. Samingan, A. Aziz, H. Halim","doi":"10.1109/APACE.2007.4603952","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603952","url":null,"abstract":"This paper presents on 5.75 GHz bandpass filter based on IEEE802.11a standard for wireless LAN application. The development of bandpass filter includes calculation, simulation, testing and measurement of the filter parameters process has been presented. Simulation software for this project used Ansoft Designer software. The filter operates at center frequency of 5.75 GHz with 100 MHz bandwidth and insertion loss below 10 dB. The bandpass filter contributes to the application of direct conversion front-end receiver for WLAN application at 508 GHz frequency.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128307839","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: 21
OXADM: Feasibility of network security and migration OXADM:网络安全和迁移的可行性
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603892
M. Ab-Rahman, W. Ibrahim, M. Bukhori, S. Shaari
{"title":"OXADM: Feasibility of network security and migration","authors":"M. Ab-Rahman, W. Ibrahim, M. Bukhori, S. Shaari","doi":"10.1109/APACE.2007.4603892","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603892","url":null,"abstract":"This paper describes our recent work on advanced ring metropolitan network through the development of an Optical Cross Add-Drop Multiplexer (OXADM). OXADM is a recently invented optical networks device with an asymmetrical architecture. Designed with a purpose to combine the operational concepts of Optical Cross Connect (OXC) and Optical Add-Drop Multiplexer (OADM), OXADM is potentially useful in increasing the efficiency and flexibility of optical networks particularly of the metropolitan ring and mesh configurations. Thus, OXADM is particularly use for networks which require topology migration from ring to mesh, or vice versa [4]. The main function of OXADM is to reconfigure the optical channel path while implementing add/drop function simultaneously. The 4-channel OXADM design is expected to have a maximum operational loss of 6 dB for each channel [5]. With the accumulation function, OXADM is also able to provide survivability through restoration against failures by means of linear, multiplex and ring protection to both configurations that are integrated in single optical architecture. Output power degradation during ring activation is expected to be at 2 dB with respect to normal operating condition. The test was carried out at 2.5 Gbps with BER of 1times10-10 for linear protection, while BER of 1times10-19 (to west) and BER of 1times10-13 (to east) were used for ring protection.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125427232","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
Three element compact broadband parallel-coupled microstrip bandpass filter of simple configuration 结构简单的三元紧凑型宽带并联耦合微带带通滤波器
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603984
J. Marimuthu, Mona Riza Mohd Esa
{"title":"Three element compact broadband parallel-coupled microstrip bandpass filter of simple configuration","authors":"J. Marimuthu, Mona Riza Mohd Esa","doi":"10.1109/APACE.2007.4603984","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603984","url":null,"abstract":"A simple broadband parallel-coupled microstrip line (PCML) bandpass filter with compact design is proposed. A PCML structure with two feeding network of various widths is characterized by an equivalent J-inverter network. The extracted parameters indicate that the normalized J susceptance and equivalent electrical length are frequency dependent. A pair of PCML structure with centre resonator, without ground plane aperture at PCML structure and capacitive open-ended stub at the centre resonator, is proposed. The proposed design is further optimized by adjusting the length and width of the centre resonator. Three broadband bandpass filters with PCML structure of various couplings have been designed. It was found that the simulated and measured insertion and return losses responses showed good agreement with operating bandwidth of over 80%, return loss of better than -16 dB and 250% wide upper stopband.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124738180","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: 6
Antenna array at 2.4 GHz for wireless LAN system using point to point communication 2.4 GHz天线阵列用于无线局域网系统，采用点对点通信
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603890
M. Rahim, M. Karim, T. Masri, O. Ayop
{"title":"Antenna array at 2.4 GHz for wireless LAN system using point to point communication","authors":"M. Rahim, M. Karim, T. Masri, O. Ayop","doi":"10.1109/APACE.2007.4603890","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603890","url":null,"abstract":"This paper described the design of microstrip patch antenna array operating at 2.4 GHz for Wireless Video using point to point communication system. The array of four by four microstrip square patch antennas with inset feed technique were designed, simulated, fabricated and measured with the aid of microwave office software. The simulation and measurement results are able to operate in ISM band for point to point communication system. The four by four arrays had a return loss of -8 dB with 16% bandwidth. The gain obtained from measurement is 14 dBi with 30deg half power beamwidth (HPBW) for H plane and 28deg for E Plane.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"285 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123071051","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
Dual polarization inset-fed microstrip patch antenna 双极化插入馈电微带贴片天线
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603950
M. Shah, M. Rose, M. Kadir, D. Misman, M. Aziz, M. K. Suaidi
{"title":"Dual polarization inset-fed microstrip patch antenna","authors":"M. Shah, M. Rose, M. Kadir, D. Misman, M. Aziz, M. K. Suaidi","doi":"10.1109/APACE.2007.4603950","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603950","url":null,"abstract":"This paper present 3 design of array antenna from type of inset-fed microstrip patch antenna located at 45deg and -45deg and capable to generate dual-polarization radiation pattern. Combinations of two patches using quarter-wave impedance matching technique have been used to design the array antenna operate at 2.4 GHz with return loss (RL) less than -10 dB. Those design were simulated using Microwave Office 2006 and were fabricated on FR4 substrate with a dielectric constant epsivr = 4.7, tan sigma = 0.019 and thickness =1.6 mm. Data analysis also has been done to compare the results between simulation and measurement. The result showed that the combination of more patches in array antenna can improve the RL. The prototype of 3 design 1times2 array antenna yields a bandwidth of 5%, HPBW for single element found at 90.07deg-89.75deg and HPBW for array antenna found at 84.68deg-79.05deg.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134087738","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
Road pavement density measurements using Ground Penetrating Radar (GPR): Simulation analysis 利用探地雷达(GPR)测量路面密度:模拟分析
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603913
R. Abdullah, H. Shafri, M. Roslee
{"title":"Road pavement density measurements using Ground Penetrating Radar (GPR): Simulation analysis","authors":"R. Abdullah, H. Shafri, M. Roslee","doi":"10.1109/APACE.2007.4603913","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603913","url":null,"abstract":"This paper describes a simulation of ground penetrating radar (GPR) nondestructive method at frequency range of 1.7-2.6 GHz to predict density for various road pavement samples. The method used is very simple, fast, contactless and accurate way to determine the density of road pavement. In this work we used frequency range between 1.7-2.6 GHz due to the high penetration in road pavement. The MATLAB software is used to analyze the simulation data and also for the graphs comparisons. An instantaneous method for measuring the density of road pavement was developed by using microwave transmission/reflection technique and free space method at the chosen frequency. The GPR Mixture Model was used to predict the correlation between the attenuation to the parameters related such as effective permittivity, density and thickness.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132272458","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
The effect of MOSFET second-order nonlinearity on active inductor-based oscillators MOSFET二阶非线性对有源电感振荡器的影响
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603974
L. Lee, A. A'Ain, A. Kordesch
{"title":"The effect of MOSFET second-order nonlinearity on active inductor-based oscillators","authors":"L. Lee, A. A'Ain, A. Kordesch","doi":"10.1109/APACE.2007.4603974","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603974","url":null,"abstract":"Second-order nonlinearity of the MOSFET has significant impact on active inductor (AI) based oscillators, regardless of whether they are single-ended or differential. By using Taylor series expansion, this paper shows that second-order nonlinearity of the MOSFET will cause a shift in the DC biasing of an AI-based oscillator, depending on oscillation amplitude. The DC bias shift results in a change of the transistor transconductance and parasitic components from their original value, which will affect the oscillator resonance frequency. This explains why a small-signal S-parameter simulation is not sufficient to accurately predict the oscillation frequency and tuning range of AI-based oscillators, even at moderate oscillation amplitudes.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132850768","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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