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2007 Asia-Pacific Conference on Applied Electromagnetics最新文献

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Modeling and performance analysis of WCDMA radio over fiber system WCDMA光纤无线通信系统建模与性能分析
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603973
H. Nasoha, S. M. Idrus
{"title":"Modeling and performance analysis of WCDMA radio over fiber system","authors":"H. Nasoha, S. M. Idrus","doi":"10.1109/APACE.2007.4603973","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603973","url":null,"abstract":"Radio over fiber (RoF) systems is characterized by having both a fiber optic link and free-space radio path. The purpose of this paper is to assess the performance of radio over fiber links for WCDMA by simulation. The developed simulation models have integrated systems for both RF wireless and optical fiber systems that would be transparent to a UMTS system. Whereby, in this WCDMA RoF network model consists of central station, one remote access unit and an optical fiber link model that uses commercially available parameters. In this system, external modulators technique which is electroabsorption modulator is applied. The whole hierarchical simulation system model was constructed and simulated using a commercial optical system simulator. By varying the modulation index, the log of bit-error-rate (BER) can be achieved as low as around -450 dB. Comparing the results of different optical power input not lead to a big different of distances that can be achieved.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"5 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":"132233629","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: 16
Design of a high speed and low power digital matched filter for CDMA system CDMA系统中高速低功耗数字匹配滤波器的设计
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603876
I. Saini, R. Sarin, M. Khosla, H. Singh
{"title":"Design of a high speed and low power digital matched filter for CDMA system","authors":"I. Saini, R. Sarin, M. Khosla, H. Singh","doi":"10.1109/APACE.2007.4603876","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603876","url":null,"abstract":"Code division multiple access (CDMA) is a rapidly expanding data transmission technique in the emerging universal mobile telecommunication system. Digital matched filter (DMF) in a CDMA system is used for correlating the received data with the transmitted data. The key issues in the design of a DMF are speed and power. This paper presents the design of a fine-grain pipelined DMF with clock gating with an objective to increase the speed and at the same time reduce the power consumption. The design has been verified through simulation and synthesis of the existing DMF and the proposed architectures. Verilog HDL coding of the design is done using Xilinx ISE design tool. Speed and estimated power consumption of the design are obtained using XST Synthesis and XPower tools of Xilinx respectively.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"9 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114005046","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
Measurement corrections for phase noise characterization with different baseband analyzer 不同基带分析仪相位噪声特性的测量校正
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603929
Toh Chee Leng
{"title":"Measurement corrections for phase noise characterization with different baseband analyzer","authors":"Toh Chee Leng","doi":"10.1109/APACE.2007.4603929","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603929","url":null,"abstract":"Phase noise characterization with different instrument required different measurement corrections. In this paper, with frequency discriminator method, two types of spectrum analyzer, e.g. swept signal analyzer and Fast Fourier Transform (FFT) analyzer are used. By looking into the different of operation for the instrument, different sets of correction factor are determined. Considering the correction factor into the phase noise characterization, the measurement results are compared. With a signal source analyzer, the measurement corrections are further verified. A correction measurement with corrections for compensating the instrument effect in phase noise characterization is discussed.","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":"114885869","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
Determination of copper contamination from various sources in an RFIC wafer fab using VPD -TXRF methodology 用VPD -TXRF方法测定RFIC晶圆厂中不同来源的铜污染
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603944
H.A. Bakar, Z. Awang, W. Razali
{"title":"Determination of copper contamination from various sources in an RFIC wafer fab using VPD -TXRF methodology","authors":"H.A. Bakar, Z. Awang, W. Razali","doi":"10.1109/APACE.2007.4603944","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603944","url":null,"abstract":"The expansion of radio frequency (RF) applications has given a tremendous push to an increment of circuit density which is can be pack more electronic components on a chip and thereby provide higher performance. However as integrated circuits become denser as well as feature size become smaller, the conventional metallization aluminium (Al) has it limitations. But then the use of copper (Cu) is increasingly attractive because they have higher electromigration resistance and demonstrate a lower resistivity than Al. Due to the superior properties of Cu, a chip made by Cu may need only half as many metal layers as one made with Al, providing considerable reduction in manufacturing cost. Since Cu has many advantages and offer a cost saving, manufacturers prefer to have a shared line together with Al. However, despite all the advantages, Cu also has some drawbacks because it is a deep level dopant on silicon and cause large generation of electron and holes in depletion layers. So, results in large leakage and degraded reliability. These imply that prevention of Cu contamination is important in a fabrication. Hence, appropriate methodology is required to prevent it seeing as current method of Cu contamination detection highlighting on a wafer surface only. This paper presents a new method, VPD-TXRF, which can be use to detect a Cu contamination that come from many sources in a wafer fab. This method was definite by gauge repeatability and reproducibility (GR&R) study and correlation with current method; Inductive Couple Plasma Mass Spectrometer (ICPMS). A positive result validated this method as a novel method to evaluate the level of Cu that come from many sources in a wafer fab.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"114 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":"116831722","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
The effect of conductor line to meander line antenna design 导线对弯曲线天线设计的影响
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603953
D. Misman, I. Salamat, M. Kadir, M. Rose, M. Shah, M. Aziz, M. N. Husain
{"title":"The effect of conductor line to meander line antenna design","authors":"D. Misman, I. Salamat, M. Kadir, M. Rose, M. Shah, M. Aziz, M. N. Husain","doi":"10.1109/APACE.2007.4603953","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603953","url":null,"abstract":"In this paper, the meander line antenna have been designed to operate at 2.4-GHz for WLAN application. Two different designs of meander line antenna are investigates, without conductor line and with conductor line. The Microwave Office software is used for simulation design process. The antenna is fabricated on a double-sided FR-4 printed circuit board using an etching technique. Then the design has been tested with the advantest network analyzer. The comparison between simulation and measurement results for the return loss and radiation patterns were presented. A bandwidth of 152 MHz and return loss of -37.7 dB were obtained at frequency 2.4 GHz. The gain is comparable to microstrip yagi antenna.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"10 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":"134051625","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
Effect of grounding arrangement on PZT thin film capacitor 接地布置对PZT薄膜电容器的影响
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603975
S. Sulaiman, N. Lazim, R. A. Bakar, Z. Awang, A. Dollah
{"title":"Effect of grounding arrangement on PZT thin film capacitor","authors":"S. Sulaiman, N. Lazim, R. A. Bakar, Z. Awang, A. Dollah","doi":"10.1109/APACE.2007.4603975","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603975","url":null,"abstract":"This paper reports on a new investigation carried out on the grounding arrangement of monolithic microwave integrated circuit (MMIC) thin film capacitors to improve their high frequency behavior. Via holes have been etched on the PZT to create the ground contact. The measurement shows an improvement in the capacitor response compared to direct contact to the exposed Pt area at the film edge.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"20 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":"132589686","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
Performance degradation of defective MEMS tunable RF filter 缺陷MEMS可调谐射频滤波器的性能退化
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603931
W. Wong, H. T. Su, K.C. Lee, M.A.M. Ali, B. Majlis
{"title":"Performance degradation of defective MEMS tunable RF filter","authors":"W. Wong, H. T. Su, K.C. Lee, M.A.M. Ali, B. Majlis","doi":"10.1109/APACE.2007.4603931","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603931","url":null,"abstract":"The common defects that could occur during the fabrication and long term operation of a tunable bandpass filter using RF MEMS switches are simulated with SONNET. The faulty responses of the defective filter are then analyzed and linked to the defects that cause them. The work carried out aims at being able to narrow down and possibly identify the defects quickly in future by measuring the faulty filter responses, thus enabling defects to be screened quickly or for the development of built-in self-testable filter.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"67 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":"123513299","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
Preliminary development of mini anechoic chamber 微型消声室的初步研制
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603965
A. Hasnain, M. Imran, Z.S. Rohaiza, S. Roslan, A.A. Takiyuddin, A. Rusnani, A. Azremi
{"title":"Preliminary development of mini anechoic chamber","authors":"A. Hasnain, M. Imran, Z.S. Rohaiza, S. Roslan, A.A. Takiyuddin, A. Rusnani, A. Azremi","doi":"10.1109/APACE.2007.4603965","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603965","url":null,"abstract":"The purpose of mini anechoic chamber is to allow cost effective testing of microwave signal. It is because measurements of the radiation pattern are usually done in an anechoic chamber in order to avoid reflections from nearby objects and external interference from affecting the field pattern. The most important element in anechoic chamber is absorber. The electromagnetic wave absorbers are used to absorb the reflected wave that occurs on the wall of the chamber. A good absorber is the one with smaller reading of reflection wave. The operation of absorber depends on the design and the material used. This project focused on the development and designs the absorbers for anechoic chamber. There were then assembled into a chamber for further testing.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"50 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":"125644201","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: 13
High-resolution SAR imaging system using tapered slot antenna with orthogonally anisotropic directivity 采用正交各向异性锥形缝隙天线的高分辨率SAR成像系统
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603920
S. Mochizuki, H. Togo, N. Kukutsu, T. Nagatsuma
{"title":"High-resolution SAR imaging system using tapered slot antenna with orthogonally anisotropic directivity","authors":"S. Mochizuki, H. Togo, N. Kukutsu, T. Nagatsuma","doi":"10.1109/APACE.2007.4603920","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603920","url":null,"abstract":"We have developed a synthetic aperture radar (SAR) imaging system using an ultra-short pulse for the nondestructive evaluation of reinforced concrete structures. A Vivaldi tapered slot antenna is designed to have the 10-dB bandwidth from 3.2 to 11.3 GHz. In the system, a monocycle pulse wave with the duration shorter than 200 ps is propagated in free space. Two-dimensional imaging in a reinforced concrete sample demonstrated that the system can estimate the positions of reinforcing bars with a depth resolution of less than 2 mm which is a tenth that of a conventional system. To increase radiation efficiency for SAR, the antenna directivity is designed to be orthogonally anisotropic with radiation angles in the azimuth and elevation directions of 120 and 60 degrees, respectively. Synthesizing an image along the azimuth direction enables the shapes of the reinforcing bars to be restored with high spatial resolution and contrast from radar echoes.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"17 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":"132619560","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
Effects of cross-phase modulation crosstalk in WDM networks on received power and number of channels for various fiber types WDM网络中交叉相位调制串扰对不同类型光纤接收功率和信道数的影响
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603977
Y. Karfaa, M. Ismail, F. M. Abbou, S. Shaari, S. Majumder
{"title":"Effects of cross-phase modulation crosstalk in WDM networks on received power and number of channels for various fiber types","authors":"Y. Karfaa, M. Ismail, F. M. Abbou, S. Shaari, S. Majumder","doi":"10.1109/APACE.2007.4603977","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603977","url":null,"abstract":"We present a comprehensive theoretical study of cross-phase modulation in optical fiber with exploring four fiber types. The cross-phase modulation induced crosstalk noise is described by a system of coupled equations, which describes mutual channel interference optical losses in multi channel optical communications system. The corresponding system of equations has then been numerically integrated, and the channels interaction phenomena such as cross-phase modulation have been described. System performance is evaluated through determining the cumulative crossphase modulation crosstalk relation with both of the received power and number of channels. Various types of optical fiber have been used in the numerical results. The results can be generalized for all other types of optical fiber.","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":"128600547","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
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