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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
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
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
Target strength measurement of Selar boops (Oxeye scad) using 38 kHz and 120 kHz 使用38 kHz和120 kHz测量Selar boops (Oxeye scad)的目标强度
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603925
Sunardi, A. Mohd, J. Din, R. Hassan, N. Seman
{"title":"Target strength measurement of Selar boops (Oxeye scad) using 38 kHz and 120 kHz","authors":"Sunardi, A. Mohd, J. Din, R. Hassan, N. Seman","doi":"10.1109/APACE.2007.4603925","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603925","url":null,"abstract":"Furuno FQ-80 Scientific Echo Sounder can be performed on dual-frequency capabilities, 38 kHz and 120 kHz, as an individually or simultaneously. Measurement of target strength (TS) for Selar boops (Oxeye scad) had been deployed using FQ-80 on 228 dB and 236 dB of source level (SL) at low and high frequency, respectively. The fish were sited in the net cage at the bottom of the vessel. TS value, depth, and position (x-y-z) of single fish which detected at every ping at low and high frequency has been observed from recorded echogram using FQ-80 Analyzer. Fish TS detected at low and high frequency are ranging from -47.40 to -38.33 dB with the average of -44.49 dB and -45.19 to -42.76 dB with the average of -43.96 dB. Thus, fish TS detected at higher frequency is stronger than at lower frequency.","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":"122764961","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: 3
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
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
Month-to-month variability of the melting layer boundaries 熔化层边界的逐月变化
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603900
N. Khamis, O. Sharif, Z. Hanzaz, A. Baharom
{"title":"Month-to-month variability of the melting layer boundaries","authors":"N. Khamis, O. Sharif, Z. Hanzaz, A. Baharom","doi":"10.1109/APACE.2007.4603900","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603900","url":null,"abstract":"The Bright-band is the typical enhancement in radar reflectivity during the melting process, which is still not completely determined. The seasonal variation over the year can give the characteristics that are valuable for designing and planning of a satellite link. The Malaysian meteorological radar data, from Kluang radar station (Johor), is used to trace the signature of the melting layer during stratiform precipitations events. The trends of the boundaries of the melting layer were studied by considering data extended to cover a six-month period (January-June 1998). It was observed that the boundaries and the thickness of the melting layer are found to be seasonally dependent.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"37 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":"127654527","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
Analysis of Y-junction waveguide using the method of line 用直线法分析y结波导
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603967
Z. Lambak, I.A. Tengku, A. Syahriar, A.J.M. Adnan, Chan Wai Yee
{"title":"Analysis of Y-junction waveguide using the method of line","authors":"Z. Lambak, I.A. Tengku, A. Syahriar, A.J.M. Adnan, Chan Wai Yee","doi":"10.1109/APACE.2007.4603967","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603967","url":null,"abstract":"A new approach of the sinusoidal bend Y-junction optical waveguides analysis using the method of lines (MOL) has been developed. In this paper, the shape of the Y-junction is approximated by cascading straight waveguide structure or segment. The segment may have different width and length depending on the refractive index profile of the Y-junction. The loss of the Y-junction is calculated by overlapping the propagated field with the fundamental mode of the structure. The result was compared with commercial software and it was found that the two results give similar answer.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"27 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":"131894198","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: 3
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