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High Frequency Postgraduate Student Colloquium, 2004

6-7 Sept. 2004

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Displaying Results 1 - 25 of 67
  • 2004 High Frequency Postgraduate Student Colloquium (IEEE Cat. No.04TH8740)

    Publication Year: 2004
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  • [Inside front cover - Blank]

    Publication Year: 2004, Page(s): 0_2
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  • 2004 High Frequency Postgraduate Student Colloquium - Title

    Publication Year: 2004, Page(s): i
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  • Copyright

    Publication Year: 2004, Page(s): ii
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  • Forward

    Publication Year: 2004, Page(s): iii
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  • Contents

    Publication Year: 2004, Page(s):v - vii
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  • [Breaker page]

    Publication Year: 2004, Page(s): viii
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  • Session #1: Optical and Terahertz Technologies

    Publication Year: 2004, Page(s): 1
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  • [Breaker page]

    Publication Year: 2004, Page(s): 2
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  • Optical wireless communication front-ends

    Publication Year: 2004, Page(s):3 - 8
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (297 KB) | HTML iconHTML

    Infrared wireless communication possesses two main attractive advantages over its radio frequency counterpart, namely the abundance of unregulated spectrum in the 700 nm 1500 nm region and the ease with which the IR radiation can be confined. Integrating microwave electronics and optics, it is possible to provide wideband communication services but it is well known that the signal level in an opti... View full abstract»

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  • Simulated monolithically integrated single photon counter

    Publication Year: 2004, Page(s):9 - 14
    Cited by:  Papers (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    Simulations of a Geiger-mode avalanche photodiode (GMAP) monolithically integrated with its corresponding active quench and reset circuit (AQRC) are presented. The AQRC design is simulated in Agilent's ADS simulator using BSIM3 MOSFET models acquired from Europractice's 0.6 /spl mu/m CMOS process. The novelty of the design ensures a minimum dead-time of 13 ns between adjacent incident photons. Thi... View full abstract»

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  • Terahertz detection using photon-assisted tunnelling in triple-barrier quantum well structures

    Publication Year: 2004
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    Summary form only given. The results of measurements on photon-assisted tunnelling in triple-barrier quantum well structures are reported. The series of AlGaAs/GaAs structures have been extensively characterised and have quantum well confinement energies of 40 to 90 meV. The energy width of the quantum well states is appropriately 1.2 meV. A Cavendish Laboratory quantum cascade laser (2.9 THz, >... View full abstract»

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  • [Breaker page]

    Publication Year: 2004, Page(s): 16
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  • Enhanced performance of a 100km directly-modulated radio-over-fibre link using an unfiltered semiconductor optical amplifier

    Publication Year: 2004, Page(s):17 - 21
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (189 KB) | HTML iconHTML

    An unfiltered 1310 nm semiconductor optical amplifier is employed as an inline power booster in a low-cost directly-modulated, 100 km radio-over-fibre link to compensate for the attenuation of the fibre. Substantial performance enhancement has been achieved. In addition, an application of this technique within a distributed antenna system with a tree architecture, supporting in excess of 100 anten... View full abstract»

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  • [Breaker page]

    Publication Year: 2004, Page(s): 22
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  • Performance analysis of the photoparametric up-converter using harmonic balance techniques

    Publication Year: 2004, Page(s):23 - 28
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (254 KB) | HTML iconHTML

    The photoparametric amplifier (PPA) operation is based on the non-linear CV characteristics of a photodiode and therefore, the mechanism constituting gain is highly non-linear and different to that in a conventional amplifier/mixer chain. A PPA has been successfully modelled and simulated using a nonlinear microwave simulator to perform harmonics balance analysis, which represented the photodiode ... View full abstract»

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  • Session #2: Sensors and EM Tomography

    Publication Year: 2004, Page(s): 29
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  • [Breaker page]

    Publication Year: 2004, Page(s): 30
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  • Non-destructive testing of complex permittivity using a slot antenna

    Publication Year: 2004, Page(s):31 - 36
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (299 KB) | HTML iconHTML

    A planar resonant slot antenna with a ground plane aperture was developed for nondestructive testing of planar dielectric materials. Using an existing design methodology, a circuit was developed where the complex permittivity could be determined from the shift of the resonant frequency and knowledge of the thickness of the test substrate. The device was simulated using the method of moments and th... View full abstract»

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  • Microwave radar sensor as solid flow counter

    Publication Year: 2004, Page(s):37 - 40
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (152 KB) | HTML iconHTML

    Microwave radar sensors (MRS) studies are usually based on the analysis of the frequency response of the reflected signal. A MRS system operating at 10.6 GHz, with computer integration, has been built to study the signal characteristic of solid flows. Beans of /spl lambda//4 in size have been used in this study. The amplitude of the reflected signal has been found to be useful in describing the fl... View full abstract»

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  • Scanning microwave coaxial cavity profiler [PCB conductor pattern profiling]

    Publication Year: 2004, Page(s):41 - 45
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (189 KB) | HTML iconHTML

    A /spl lambda//4 TEM open-ended coaxial probe cavity operating at 1 GHz is developed to provide profile information for conductor patterns on printed circuit boards. The cavity's inner conductor is terminated in an open circuit probe tip projecting from the resonator's end. The proximity of track metallization reduces the resonance frequency of the sensor and this perturbation is used to extract p... View full abstract»

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  • [Breaker page]

    Publication Year: 2004, Page(s): 46
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  • SAW bioliquids sensor with RF interrogation

    Publication Year: 2004, Page(s):47 - 52
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (266 KB) | HTML iconHTML

    A system based on shear horizontal surface acoustic wave (SH-SAW) devices operating in the 433 MHz and 869 MHz industrial, scientific and medical (ISM) bands is proposed for wireless identification and characterisation of bioliquids. The theory of operation is briefly explained and details of the passive microsensors design and fabrication are presented. A small device antenna is analyzed and the ... View full abstract»

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  • Microwave tomographic imaging based on real data

    Publication Year: 2004, Page(s):53 - 57
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (152 KB) | HTML iconHTML

    Tomographic systems using X-rays, capacitance, electrical resistance or electrical impedance have already been developed. This paper presented a new kind of tomographic system, the microwave tomographic system. The system consists of new imaging cells with air or water as a background medium, transmitting and receiving antennas matched to air or water, and an existing network analyser. On the othe... View full abstract»

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  • [Breaker page]

    Publication Year: 2004, Page(s): 58
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