Microwave Technology in the Terahertz Region

Brand, H.

doi:10.1109/euma.1991.336418

Cited by 4 publications

(2 citation statements)

References 80 publications

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“…Die Verluste bei die Frequenz über diese Grenze hinaus, so steigen die der Wellenführung treten im wesentlichen an den fokussie-Hohlleiterverluste stark an [1] und die Herstellung der renden Elementen auf; beispielsweise muß bei einer Teffeinen Strukturen wird immer problematischer. Erhöht man oder elliptischen Spiegeln durchgeführt.…”

Section: Einleitung 2 Entwurf Des Quasioptischen Meßplatzesunclassified

Ein breitbandiger Oszillator-Meßplatz in flexibler quasioptischer Technik für den Frequenzbereich 170 GHz bis 260 GHz

Brune¹,

Steup²,

Stöckel³

1995

Frequenz

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Herrn Professor Dr.-Ing. Hans Brand zum 65. Geburtstag gewidmet Übersicht: Oberhalb von etwa 100 GHz ist die Realisierung von Hochfrequenzschaltungen in quasioptischer Technik wegen ihrer geringen Verluste sehr vorteilhaft. Es wird ein flexibles quasioptisches Meßsystem vorgestellt, welches schnelle Schaltungsaufbautcn ohne aufwendige Strahlberechnungen ermöglicht. Zunächst werden die prinzipiellen Beziehungen zur Dimcnsionicrung des Strahlwellenleiters angegeben. Anhand eines Oszillator-Mcßaufbaus für den Frequenzbereich von 170 bis 260 GHz wird dann der praktische Einsatz des Mcßplatzcs demonstriert. Ein gesonderter Abschnitt ist dem Entwurf und der meßtechnischen Untersuchung des Filter-Frequenzdiskriminators gewidmet, welcher ebenfalls in quasioptischer Technik realisiert wurde.Abstract: At frequencies above about 100 GHz the realization of high frequency circuits in quasi-optical technique is advantageous because of low loss. A flexible quasi-optical measurement system is presented, on which the circuits can be realized quickly without need for difficult and time-consuming beam calculations. At first the basic relations for the design of the beam waveguide are presented. With the example of an oscillator measurement setup for the frequency range from 170 to 260 G Hz the practical use of the system is demonstrated. The design and measurement of the frequency discriminator, which was also realized in quasi-optical technique, is presented more detailed in a separate section.Für die Dokumentation: Quasioptik / Oszillator / Resonator / Terahertz

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Section: Einleitung 2 Entwurf Des Quasioptischen Meßplatzesunclassified

Ein breitbandiger Oszillator-Meßplatz in flexibler quasioptischer Technik für den Frequenzbereich 170 GHz bis 260 GHz

Brune¹,

Steup²,

Stöckel³

1995

Frequenz

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“…A useful synergy is being established between terahertz research and nanotechnology. High power sources [1][2][3] and detectors [4] in what was once considered the terahertz 'frequency gap' [5] in the electromagnetic spectrum have stimulated research with huge potential benefits in a range of industries including food, medicine and security, as well as fundamental physics and astrophysics. This special section, with guest editors Masayoshi Tonouchi and John Reno, gives a glimpse of the new horizons nanotechnology is broaching in terahertz research.…”

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confidence: 99%

Terahertz nanotechnology

Demming¹,

Tonouchi²,

Reno³

2013

Nanotechnology

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A useful synergy is being established between terahertz research and nanotechnology. High power sources [1–3] and detectors [4] in what was once considered the terahertz 'frequency gap' [5] in the electromagnetic spectrum have stimulated research with huge potential benefits in a range of industries including food, medicine and security, as well as fundamental physics and astrophysics. This special section, with guest editors Masayoshi Tonouchi and John Reno, gives a glimpse of the new horizons nanotechnology is broaching in terahertz research.While the wavelengths relevant to the terahertz domain range from hundreds of micrometres to millimetres, structures at the nanoscale reveal interesting low energy dynamics in this region. As a result terahertz spectroscopy techniques are becoming increasingly important in nanomaterial characterization, as demonstrated in this special section by colleagues at the University of Oxford in the UK and the Australian National University. They use terahertz spectroscopy to identify the best nanostructure parameters for specific applications [6]. The low energy dynamics in nanostructures also makes them valuable tools for terahertz detection [7]. In addition the much sought after terahertz detection over broadband frequency ranges has been demonstrated, providing versatility that has been greatly in demand, particularly in spectroscopy applications [8, 9]. Also in this special section, researchers in Germany and China tackle some of the coupling issues in terahertz time domain spectroscopy with an emitter specifically well suited for systems operated with an amplified fibre [3].'In medical imaging, the advantage of THz radiation is safety, because its energy is much lower than the ionization energy of biological molecules, in contrast to hazardous x-ray radiation,' explains Joo-Hiuk Son from the University of Seoul in Korea in his review [10]. As he also points out, the rotational and vibrational energies of water molecules are within the THz spectral region providing an additional benefit. His review describes the principle, characteristics, and applications of terahertz molecular imaging, where the use of nanoparticle probes allows dramatically enhanced sensitivity.Jiaguang Han and Weili Zhang and colleagues in China, Saudi Arabia, Japan and the US report exciting developments for optoelectronics [11]. They describe work on plasmon-induced transparency (PIT), an analogue of electromagnetically induced transparency (EIT) where interference leads to a sharp transparency window that may be useful for nonlinear and slow-light devices, optical switching, pulse delay, and storage for optical information processing. While PIT has advantages over the cumbersome experimental systems required for EIT, it has so far been constrained to very narrow band operation. Now Zhang and colleagues present the simulation, implementation, and measurement of a broadband PIT metamaterial functioning across a frequency range greater than 0.40 THz in the terahertz regime.'We can foresee a historic breakthr...

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Hochfrequenztechnik im Terahertz-Bereich-Aufgaben, Lösungen, Herausforderungen

Brand

1993

Archiv f. Elektrotechnik

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Microwave Technology in the Terahertz Region

Cited by 4 publications

References 80 publications

Ein breitbandiger Oszillator-Meßplatz in flexibler quasioptischer Technik für den Frequenzbereich 170 GHz bis 260 GHz

Ein breitbandiger Oszillator-Meßplatz in flexibler quasioptischer Technik für den Frequenzbereich 170 GHz bis 260 GHz

Terahertz nanotechnology

Hochfrequenztechnik im Terahertz-Bereich-Aufgaben, Lösungen, Herausforderungen

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