2004 RF and Microwave Conference (IEEE Cat. No.04EX924)

5-6 Oct. 2004

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  • 2004 RF and Microwave Conference (IEEE Cat. No.04EX924)

    Publication Year: 2004
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  • Copyright

    Publication Year: 2004, Page(s): 0_2
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  • 2004 RF and Microwave Conference - RFM 2004 - Proceedings - Title Page

    Publication Year: 2004, Page(s): 0_3
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  • Advisory Committee

    Publication Year: 2004, Page(s): 0_4
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  • Foreward

    Publication Year: 2004, Page(s): i
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  • Table of contents

    Publication Year: 2004, Page(s):ii - vii
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  • Broadband RF feedback amplifier design with simple feedback network

    Publication Year: 2004, Page(s):1 - 4
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB) | HTML iconHTML

    The paper presents a simple and fast design technique for an RF feedback amplifier. The amplifier uses a series resistor and capacitor as the feedback element. An overview of the amplifier impedance analysis and the noise theory of the amplifier is presented. A high frequency passive component model is also presented. With a current consumption of 6 mA, the simulated amplifier features a noise fig... View full abstract»

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  • Low noise amplifier circuit design for 5 GHz to 6 GHz

    Publication Year: 2004, Page(s):5 - 8
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB) | HTML iconHTML

    The development of wireless portable electronics is moving towards smaller and lighter devices. Although low noise amplifier (LNA) performance is extremely good nowadays, the design engineer still has to make some complex system trades. Many LNA are large, heavy and consume a lot of power. The design of an LNA in radio frequency (RF) circuits requires the trade-off of many important characteristic... View full abstract»

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  • Design of 12 W X-band high power cascade amplifier

    Publication Year: 2004, Page(s):9 - 12
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (231 KB) | HTML iconHTML

    To achieve optimum electrical performance of a high power amplifier (HPA), there are many considerations that need to be taken care of, such as impedance matching, bias network design, grounding and heat sinking of the HPA device. Nowadays, most semiconductor manufacturers produce internally matched HPA devices to shorten the user's development time. Even though the device used is internally match... View full abstract»

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  • Design of 2 GHz quasi-lumped element oscillator

    Publication Year: 2004, Page(s):13 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (163 KB) | HTML iconHTML

    This paper discusses the design of a quasi-lumped element PHEMT oscillator, operating at 2 GHz. The quasi-lumped element resonator, fabricated on an FR4 printed circuit board, which consists of an interdigital capacitor in parallel with a straight line inductor, was used as a stabilizing element in the feedback type oscillator configuration. The quasi-lumped element oscillator operated at 2.056 GH... View full abstract»

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  • Design of tower mounted amplifier for WCDMA applications

    Publication Year: 2004, Page(s):17 - 19
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (142 KB) | HTML iconHTML

    This paper describes the design of a tower mounted amplifier (TMA) which is used to improve the cell coverage and capacity in a wireless communication system. This technology and application is basically the extension of the connection between a 3G radio base station and its antenna. From the design results, a 10.5 dB gain TMA is achieved. While a 0 dB gain TMA gave approximately 5.47 km coverage,... View full abstract»

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  • Comparison of the rain drop size distribution model in tropical region

    Publication Year: 2004, Page(s):20 - 22
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB) | HTML iconHTML

    Information on raindrop size distribution (DSD) is important for prediction of the microwave signal attenuation due to rain, especially for high microwave frequency applications. The modeling of the raindrop size distribution in temperate and tropical regions is different because the tropical region experiences a heavy rain rate compared to the temperate region. This paper reports the comparison o... View full abstract»

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  • Study of antenna array based multipath propagation phenomenon in LAS-CDMA standard

    Publication Year: 2004, Page(s):23 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB) | HTML iconHTML

    Throughout the history of wireless communications, spatially diverse antenna array systems have being important in improving the radio link between wireless users. Moreover, this system is proposed to reduce the multipath fading through its narrowly directive radiation beam. The introduction of an interference free window in the delay domain from the new LAS-CDMA standard has received much attenti... View full abstract»

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  • Spatial variation of mobile DTV signals in Singapore

    Publication Year: 2004, Page(s):28 - 32
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB) | HTML iconHTML

    Singapore has launched mobile DVB-T (COFDM 2K) on an SBS bus service. The central frequency of transmission is 602 MHz and it has 8 MHz bandwidth. An experimental campaign is undertaken in 48 sectors to study the location variation of the DTV signals and the results are compared with the ITU-R values. Measurements carried out in 48 sectors confirm that the results are in close agreement with the I... View full abstract»

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  • Indoor DVB-T reception using antenna diversity technique

    Publication Year: 2004, Page(s):33 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (302 KB) | HTML iconHTML

    Two omni directional antennas were used to receive the DTV signals. Antennas were mounted on an X-Y table, which was programmed to move along the X-Y directions with the required spacing. This table is interfaced to the diversity kit using a lab-view program. Three experiments were designed in different indoor environments. All these experiments were carried out along the direction radial to the t... View full abstract»

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  • Determination of rain cell size distribution for microwave link design in Malaysia

    Publication Year: 2004, Page(s):38 - 40
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (123 KB) | HTML iconHTML

    In designing or planning for a microwave link, attenuation due to rain is often a major obstacle to overcome. Sometimes, a mitigation technique such as space diversity is also considered. However, a rain event occurring in an area is not constant. Rain does not distribute evenly in a region experiencing precipitation. This is especially true in tropical regions as rain has been found to be more co... View full abstract»

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  • Investigation of a rural telecommunication system using VSAT technology in Malaysia

    Publication Year: 2004, Page(s):41 - 44
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (243 KB) | HTML iconHTML

    This study investigates the satellite network that is applied to remote telecommunication networks. The satellite network is planned based on telecommunication demand as obtained from a survey. The results of a social survey which represent the needs and capabilities of people in remote areas which lack telecommunication infrastructures in West Malaysia are given in this paper. Finally, two satell... View full abstract»

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  • Mitigation of the effect of ionospheric scintillation on differential GPS rangefinding

    Publication Year: 2004, Page(s):45 - 49
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (254 KB) | HTML iconHTML

    The phenomenon of the scintillation of radiowave propagation producing irregularities in the equatorial ionosphere is discussed in this paper. Based on a dual frequency data for fluctuations along the path of GPS signals through the equatorial station, sampled at a rate of 1 Hz, are used to investigate the phase scintillation phenomenon. Statistical parameters of the signal such as the scintillati... View full abstract»

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  • Interior perturbation based approach for reflection of surface acoustic waves at a strip or a groove for applications in pulse compression radars

    Publication Year: 2004, Page(s):50 - 52
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (146 KB) | HTML iconHTML

    Large time-bandwidth (TB) product surface acoustic wave (SAW) pulse compression filters are routinely designed and fabricated using reflective array compressors (RAC). The reflection mechanism on these RAC is well understood though it is numerically cumbersome. Analytical methods are also fraught with difficulties. A simple semi-analytical method is described herein that seeks to explain the refle... View full abstract»

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  • Four beams helical antenna array for mobile satellite application

    Publication Year: 2004, Page(s):53 - 55
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (191 KB) | HTML iconHTML

    This paper describes the design and fabrication of an helical array antenna that produces four beams operating at 10 GHz. The antenna consists of 16 helical antennas of axial mode arranged in 4 by 4 array on a PCB. The distance between helices is determined such that the beam is tilted at a certain angle and the 3 dB power is at its normal axis. This is done by feeding the antenna in series via a ... View full abstract»

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  • On the optimization of the number of elements of MMIC low pass filter using EM simulation

    Publication Year: 2004, Page(s):56 - 59
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    This paper reports on an investigation into the effect of the number of elements in designing a new monolithic microwave integrated circuit (MMIC) filter. Eesof Libra was used to characterize the effect of the number of elements while the electromagnetic simulator Sonnet was used to simulate the field response of the filter. Results of our study show that higher order filters exhibit sharper skirt... View full abstract»

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  • RF substrate noise characterization for CMOS 0.18 /spl mu/m

    Publication Year: 2004, Page(s):60 - 63
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (239 KB) | HTML iconHTML

    In the submicron technologies, RF noise isolation is becoming increasingly important. In this paper, investigations of the on-chip RF isolation techniques were carried out. The chosen isolation structures were the deep nwell (or triple well isolation) and the P+ guard ring. The test structures were designed and fabricated using Silterra CMOS 0.18 /spl mu/m mixed signal process. The design paramete... View full abstract»

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  • Electronically switchable suspended substrate stripline filters

    Publication Year: 2004, Page(s):64 - 66
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (169 KB) | HTML iconHTML

    Using suspended substrate striplines (SSS) a switched filter bank at L band has been designed and developed. Six SSS band pass filters, which cover the band of 1.05 to 2.15 GHz, have been designed with 200 MHz ripple bandwidth. The filter bank technology allows integration of low cost and high performance filters with switches. The design aspects and experimental results of filter, switch and filt... View full abstract»

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  • Neural design and optimization of RF/microwave EM-based multichip modules

    Publication Year: 2004, Page(s):67 - 71
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB) | HTML iconHTML

    Widely used in multichip modules, passive devices are subject to intensive research. This paper introduces the concept of accurate and fast neural models for passives that efficiently integrate electromagnetic effects. By optimizing the circuit performance, the proposed approach can predict the optimum physical/geometrical parameters of passives. Applications using neural models in commercial circ... View full abstract»

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  • Evaluation of ultra wideband (UWB) signal transmission, propagation and reception with low cost UWB RF front end

    Publication Year: 2004, Page(s):72 - 75
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (231 KB) | HTML iconHTML

    We present ultra wideband signal measurements in an indoor environment using a simple UWB transmitter and receiver at some defined ranges. At the transmitter side, the UWB source is generated using a low cost sub-nanosecond impulse generator, triggered by a rectangular pulse, and transmitted with SkyCross's UWB antenna. At the receiver side, the UWB signal is received by SkyCross's UWB antenna and... View full abstract»

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