Optical control of millimetre-wave p-HEMTs with applications to fibre radio

Iezekiel, Stavros; Bourhill, N.

doi:10.1109/mwp.2000.889784

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…The advantages of communications systems that operate above the conventional 60 GHz frequency (Iezekiel & Bourhill 2000;Wake 2002) have been analysed by Mann (2001). In comparison with a 60 GHz system, a 400 GHz system requires a much lower transmit power for a given aperture dimension, as indicated by the Friis transmission formula.…”

Section: Conclusion: Present and Future Thz Systemsmentioning

confidence: 99%

Where optics meets electronics: recent progress in decreasing the terahertz gap

Chamberlain

2003

Philosophical Transactions of the Royal Society of London. Seri

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The terahertz region of the electromagnetic spectrum offers considerable opportunities for exploitation. Recent advances in source and coherent-detection technology have enabled advances to be made in a wide range of applications. This article reviews the historical development of the field, summarizes the current state of system technology and outlines a number of current system applications, including medical imaging. The limitations of present-day technology are discussed and some future possible applications are considered.

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Section: Conclusion: Present and Future Thz Systemsmentioning

confidence: 99%

Where optics meets electronics: recent progress in decreasing the terahertz gap

Chamberlain

2003

Philosophical Transactions of the Royal Society of London. Seri

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“…MSAs have many advantages over the conventional antennas except their inherent narrow impedance bandwidth [2]. Techniques are available to enhance the impedance bandwidth such as slot loading on the patch, use of additional resonators, aperture coupling, impedance matching, and so forth [3][4][5][6]. Among these techniques, slot loading on the patch is the simplest one and has the freedom for the designer to insert different slot on the patch …”

Section: Introductionmentioning

confidence: 99%

“…The signals are transmitted over the optical fiber at high frequencies, which requires high‐frequency microwave generators, modulator, and high‐speed photodetectors, which can be rather expensive. There are, however, other techniques that are based on nonlinear phenomenon in optoelectronics devices [4, 5]. There are also the optical methods, which are based on phase to intensity conversion in chip fiber gratings [6].…”

Section: Introductionmentioning

confidence: 99%

Tunable microwave photonic frequencies generation based on stimulated Brillouin scattering operating in the L‐band region

Ahmad

Norizan

Awang

et al. 2011

Micro & Optical Tech Letters

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A tunable up frequencies of microwave photonics based on stimulated Brillouin scattering (SBS) for application in radio over fiber is demonstrated. The experimental setup consists of 7.7 km dispersion compensated fiber, which acts as the nonlinear medium for generating the SBS and is pumped by a narrow linewidth (0.015 nm) tunable laser operating in L-band region. The input-modulated RF at 2 GHz is upshifted to new frequencies of 7. 71, 7.68, 7.65, 7.62, 7.58, and 7.56 GHz at Brillouin pump wavelengths of 1580, 1585, 1590, 1595, 1600, and 1605 nm, respectively. This system allows certain tunability in the upshifted frequencies by using a tunable laser source.ABSTRACT: This article presents the comparative study of impedance bandwidth of rectangular microstrip antenna comprising different shaped slots on the patch. It is found that the rectangular slot on the center of patch is effective for the enhancement of impedance bandwidth in comparison with elliptical and circular shaped slots. Further, if the rectangular slot is shifted from the center of the patch, antenna provides dual bands. Later, if the G-shaped slot is constructed using rectangular slots, antenna gives maximum impedance bandwidth of 78.07% and gain 3 dB. The experimental impedance bandwidth of proposed antennas is verified theoretically. In all the cases, the radiation pattern is found to be broadside in nature.

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“…Thus, the study of hybrid broadband fiber-radio techniques has attracted considerable attention. 3,4) Moreover, these fiber-radio techniques can be applied to fiber-to-the-home (FTTH) systems and fiber-optic networks. In general, there are two types of lightwave that carry radio frequency (RF) signals.…”

Section: Introductionmentioning

confidence: 99%

Optoelectronic Mixing Phototransistor for Ultrawide-Band Fiber-Radio Systems

Lin¹,

Lai²

2006

jjap

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High quality hetero-epitaxial CeO 2 films are grown on MgO substrates using BaSnO 3 buffer layers. CeO 2 films and BaSnO 3 buffer layers are grown by a pulsed laser deposition method. It is found that the crystallinity of the CeO 2 films directly grown on MgO substrates is quite poor. However when we grow CeO 2 films on MgO substrates with a BaSnO 3 buffer layer, the crystallinity of CeO 2 films is improved from that of the directly grown CeO 2 films. Also the estimated in-plane crystallinity () of the CeO 2 films on the BaSnO 3 buffer layers is much improved by the introduction of the buffer layers. One of the reasons for high quality CeO 2 films are grown on MgO substrates by the introduction of BaSnO 3 buffer layers is the lattice matching between the CeO 2 films and the MgO substrates. The CeO 2 films grow in a 45 rotated mode to the BaSnO 3 buffered MgO substrates, then the lattice mismatch between the sublattice of the CeO 2 films and the MgO substrates is calculated to be 9.3%, while that of the CeO 2 films on MgO substrates in a cube on cube mode is over 25%.

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Optical control of millimetre-wave p-HEMTs with applications to fibre radio

Cited by 9 publications

References 17 publications

Where optics meets electronics: recent progress in decreasing the terahertz gap

Where optics meets electronics: recent progress in decreasing the terahertz gap

Tunable microwave photonic frequencies generation based on stimulated Brillouin scattering operating in the L‐band region

Optoelectronic Mixing Phototransistor for Ultrawide-Band Fiber-Radio Systems

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