Pub Date : 2008-12-01DOI: 10.1109/RFM.2008.4897414
F. Bin Idris, S. Ariffin
Mobile IPv6 (MIPv6) is a protocol that is proposed for the future of the mobile Internet access. The aim of MIPv6 is provide uninterrupted connection while being mobile. VoIP has stringent delay requirement and to improve the performance of VoIP, handoff latency must be keep as low as possible. In this paper the implementation of Fast Handover Mobile IPv6 (FMIPv6) is modeled and simulated using NS2. The performance is analyzed for typical PCM G.711 voice coding scheme for both MIPv6 and FMIPv6.
{"title":"Handoff latency of voice over internet protocol in Mobile IPv6","authors":"F. Bin Idris, S. Ariffin","doi":"10.1109/RFM.2008.4897414","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897414","url":null,"abstract":"Mobile IPv6 (MIPv6) is a protocol that is proposed for the future of the mobile Internet access. The aim of MIPv6 is provide uninterrupted connection while being mobile. VoIP has stringent delay requirement and to improve the performance of VoIP, handoff latency must be keep as low as possible. In this paper the implementation of Fast Handover Mobile IPv6 (FMIPv6) is modeled and simulated using NS2. The performance is analyzed for typical PCM G.711 voice coding scheme for both MIPv6 and FMIPv6.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114207064","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897371
M.F. Abdul Khalid, M. A. Haron, A. Baharudin, A. A. Sulaiman
The main objective of this project is to design a spiral antenna at a frequency range between 2.4 to 2.5 GHz. The spiral antenna is fed by a microstrip line and RT Duroid 5870 is used with dielectric constant, epsivr and thickness, tsub of 2.33 and 0.5 mm respectively. For the spiral antenna design and simulation, the Genesys software is utilised. A prototype of a circular microstrip antenna is fabricated and measured. Simulated results like return loss, VSWR and input impedance are compared with those obtained from measurements where good agreements are shown.
{"title":"Design of a spiral antenna for Wi-Fi applications","authors":"M.F. Abdul Khalid, M. A. Haron, A. Baharudin, A. A. Sulaiman","doi":"10.1109/RFM.2008.4897371","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897371","url":null,"abstract":"The main objective of this project is to design a spiral antenna at a frequency range between 2.4 to 2.5 GHz. The spiral antenna is fed by a microstrip line and RT Duroid 5870 is used with dielectric constant, epsivr and thickness, tsub of 2.33 and 0.5 mm respectively. For the spiral antenna design and simulation, the Genesys software is utilised. A prototype of a circular microstrip antenna is fabricated and measured. Simulated results like return loss, VSWR and input impedance are compared with those obtained from measurements where good agreements are shown.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126523003","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897434
M. Rahim, M. Salleh, O. Ayop, T. Masri
This paper described the design and implementation of switch beam antenna array system operating at 2.4 GHz frequency band. In this paper, four beam patterns are generated by incorporated with four dielectric antenna array and butler matrix. The PIN diode worked as a swicth while the PIC microcontroller used to control the beam pattern by setting the time delay between the beams. The result showed that the multibeam radiation pattern can be produced using this system.
{"title":"Switched beam antenna system design","authors":"M. Rahim, M. Salleh, O. Ayop, T. Masri","doi":"10.1109/RFM.2008.4897434","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897434","url":null,"abstract":"This paper described the design and implementation of switch beam antenna array system operating at 2.4 GHz frequency band. In this paper, four beam patterns are generated by incorporated with four dielectric antenna array and butler matrix. The PIN diode worked as a swicth while the PIC microcontroller used to control the beam pattern by setting the time delay between the beams. The result showed that the multibeam radiation pattern can be produced using this system.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125683338","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897407
T. Prakoso, R. Ngah, T. A. Rahman, M. A. Mualif
Due to its low propagation loss, large bandwidth, and competitive cost, optical fiber become one of the best solution for the backhaul. However, new fiber network deployment is still very expensive in outdoor and rural environment. This paper proposes and evaluates design of 5.8 GHz photonic antenna in a radio over fiber system for point-to-point applications. Simulation result shows that the proposed system can support 540 Mbps, 16-QAM, at 5.8 GHz for optical fiber length of 30 km, and extended with wireless distance of 10 km.
{"title":"5.8 GHz photonic antenna for point to point applications","authors":"T. Prakoso, R. Ngah, T. A. Rahman, M. A. Mualif","doi":"10.1109/RFM.2008.4897407","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897407","url":null,"abstract":"Due to its low propagation loss, large bandwidth, and competitive cost, optical fiber become one of the best solution for the backhaul. However, new fiber network deployment is still very expensive in outdoor and rural environment. This paper proposes and evaluates design of 5.8 GHz photonic antenna in a radio over fiber system for point-to-point applications. Simulation result shows that the proposed system can support 540 Mbps, 16-QAM, at 5.8 GHz for optical fiber length of 30 km, and extended with wireless distance of 10 km.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130077594","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897355
V. Thakare, P. Singhal, K. Das
An artificial neural network has been developed for the calculation of bandwidth of resonant microstrip antenna. The network training data is generated using IE3D an electromagnetic simulator. An example of inset feed rectangular microstrip patch antenna is being considered. A feed forward network structure is preferred for bandwidth calculation. Results of the network are compared with the data obtained from IE3D simulator and concluded that results are in good agreement with simulator findings.
{"title":"Calculation of Microstrip antenna bandwidth using Artificial Neural Network","authors":"V. Thakare, P. Singhal, K. Das","doi":"10.1109/RFM.2008.4897355","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897355","url":null,"abstract":"An artificial neural network has been developed for the calculation of bandwidth of resonant microstrip antenna. The network training data is generated using IE3D an electromagnetic simulator. An example of inset feed rectangular microstrip patch antenna is being considered. A feed forward network structure is preferred for bandwidth calculation. Results of the network are compared with the data obtained from IE3D simulator and concluded that results are in good agreement with simulator findings.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131093330","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897416
G. C. Hock, C. Chakrabarty, M. H. Badjian, S. Devkumar, Emilliano
This paper describes the use of AD8302 evaluation board from Analog Devices in super-heterodyne millimeter wave interferometer for dielectric measurement. The measurements are performed without direct contact on the millimeter wave material. Signals from the output of two mixers in the interferometer were obtained for phase shifting analysis. They are used as inputs to the evaluation board. The output from the evaluation board was connected to computer for data processing. The voltage values obtained from the board was then converted to phase angle by using the pre-calibrated data and LabViewtrade graphical programming language.
{"title":"Super-heterodyne interferometer for non-contact dielectric measurements on millimeter wave material","authors":"G. C. Hock, C. Chakrabarty, M. H. Badjian, S. Devkumar, Emilliano","doi":"10.1109/RFM.2008.4897416","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897416","url":null,"abstract":"This paper describes the use of AD8302 evaluation board from Analog Devices in super-heterodyne millimeter wave interferometer for dielectric measurement. The measurements are performed without direct contact on the millimeter wave material. Signals from the output of two mixers in the interferometer were obtained for phase shifting analysis. They are used as inputs to the evaluation board. The output from the evaluation board was connected to computer for data processing. The voltage values obtained from the board was then converted to phase angle by using the pre-calibrated data and LabViewtrade graphical programming language.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131997602","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897453
H. Abd-El-Raouf, S. Syed, Y. Antar
Two double negative (DNG) metamaterial antennas are presented. The design of the unit cell of each one of the two antennas is based on the composite right/left-handed (CRLH) transmission line (TL) model. Two designs are introduced using single and double layer structures. The dispersion diagrams of the proposed antennas are evaluated and the resonant frequencies of the different modes in the RH and the LH ranges are determined from the dispersion diagrams. Field animations of the near field below the patches and near the vias for different modes will be presented.
{"title":"Design of small antennas based on DNG metamaterials","authors":"H. Abd-El-Raouf, S. Syed, Y. Antar","doi":"10.1109/RFM.2008.4897453","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897453","url":null,"abstract":"Two double negative (DNG) metamaterial antennas are presented. The design of the unit cell of each one of the two antennas is based on the composite right/left-handed (CRLH) transmission line (TL) model. Two designs are introduced using single and double layer structures. The dispersion diagrams of the proposed antennas are evaluated and the resonant frequencies of the different modes in the RH and the LH ranges are determined from the dispersion diagrams. Field animations of the near field below the patches and near the vias for different modes will be presented.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123265193","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897358
Lau Yee Fan
67 GHz microwave coaxial connector or known as the 1.85-mm connector is developed for mode-free performance up to 67 GHz. It consists of a few precise machined connector parts stacked up against glass metal seal (GMS), which is soldered down to microcircuit housing body. Possibility of reworking damaged GMS is limited by reliability concerns on the brittle solder-gold IMC layers, resulting in high disposal .This paper details the challenges of designing a new 1.85 mm microwave sparkplug coaxial connector, as an alternative replacement for existing non-reworkable connector. New sparkplug connector features, design considerations, material selections, electromagnetic simulation studies and RF measurement verifications will be discussed in this paper.
{"title":"67 GHz microwave sparkplug coaxial connector development","authors":"Lau Yee Fan","doi":"10.1109/RFM.2008.4897358","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897358","url":null,"abstract":"67 GHz microwave coaxial connector or known as the 1.85-mm connector is developed for mode-free performance up to 67 GHz. It consists of a few precise machined connector parts stacked up against glass metal seal (GMS), which is soldered down to microcircuit housing body. Possibility of reworking damaged GMS is limited by reliability concerns on the brittle solder-gold IMC layers, resulting in high disposal .This paper details the challenges of designing a new 1.85 mm microwave sparkplug coaxial connector, as an alternative replacement for existing non-reworkable connector. New sparkplug connector features, design considerations, material selections, electromagnetic simulation studies and RF measurement verifications will be discussed in this paper.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123888695","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897352
M. H. Jusoh, F. Bakar, A. A. Sulaiman, N. Baba, R. A. Awang, Z. I. Khan
Space weather is a fairly new field in science today and has very interesting effects on the humans and technology in general. Geomagnetic storms are part of space weather and the solar-terrestrial connection. These storms have greatly affected the earth' s atmosphere and ionosphere. This project focus on detection of TIDs during geomagnetic storms. TID is part of disturbance that occurs at ionosphere and it is caused by sun activities. The important parameter in this project is TEC which is the value of TEC change rate; DeltaTEC is taken within the period of 15 minutes in order to detect TID. TEC is extracted using GPS dual frequency data which in RINEX format that supplied by JUPEM (Department Of Survey and Mapping Malaysia) and taken from receiver station located at Universiti Teknologi Malaysia, Johor (Latitude (E) 103.60 Longitude (N) 1.60). The value of DeltaTEC is compared base on largest daily Kp index for different seven days.
{"title":"Determination of traveling ionospheric disturbances of geomagnetic storm by using dual frequency GPS data","authors":"M. H. Jusoh, F. Bakar, A. A. Sulaiman, N. Baba, R. A. Awang, Z. I. Khan","doi":"10.1109/RFM.2008.4897352","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897352","url":null,"abstract":"Space weather is a fairly new field in science today and has very interesting effects on the humans and technology in general. Geomagnetic storms are part of space weather and the solar-terrestrial connection. These storms have greatly affected the earth' s atmosphere and ionosphere. This project focus on detection of TIDs during geomagnetic storms. TID is part of disturbance that occurs at ionosphere and it is caused by sun activities. The important parameter in this project is TEC which is the value of TEC change rate; DeltaTEC is taken within the period of 15 minutes in order to detect TID. TEC is extracted using GPS dual frequency data which in RINEX format that supplied by JUPEM (Department Of Survey and Mapping Malaysia) and taken from receiver station located at Universiti Teknologi Malaysia, Johor (Latitude (E) 103.60 Longitude (N) 1.60). The value of DeltaTEC is compared base on largest daily Kp index for different seven days.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124664063","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 : 2008-12-01DOI: 10.1109/RFM.2008.4897446
T. Prakoso, R. Ngah, T. A. Rahman
Active photonic antenna (APhA) designed for 2.4 GHz communication in downlink side is proposed. The APhA consists of photodiode, RF amplifier and band pass filter (BPF) in small package, integrated with RF antenna. The APhA design is simulated using optical communication simulation software at varied fiber length and free space loss (FSL). Performance improvement over passive photonic antenna (PPhA) in term of signal power, SNR, constellation diagram, and BER is achieved, especially at PPhA service boundary.
{"title":"Active photonic antenna for wireless communications at 2.4 GHz","authors":"T. Prakoso, R. Ngah, T. A. Rahman","doi":"10.1109/RFM.2008.4897446","DOIUrl":"https://doi.org/10.1109/RFM.2008.4897446","url":null,"abstract":"Active photonic antenna (APhA) designed for 2.4 GHz communication in downlink side is proposed. The APhA consists of photodiode, RF amplifier and band pass filter (BPF) in small package, integrated with RF antenna. The APhA design is simulated using optical communication simulation software at varied fiber length and free space loss (FSL). Performance improvement over passive photonic antenna (PPhA) in term of signal power, SNR, constellation diagram, and BER is achieved, especially at PPhA service boundary.","PeriodicalId":329128,"journal":{"name":"2008 IEEE International RF and Microwave Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121050621","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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