THz-TDS Characterization of the Digital Communication Channels of the Atmosphere and the Enabled Applications

Yang, Yuchen; Mandehgar, Mahboubeh; Grischkowsky, D.

doi:10.1007/s10762-014-0099-3

Cited by 37 publications

(31 citation statements)

References 52 publications

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“…For this ratio to be accurate, the The corresponding power attenuation shown in Fig. 3(c) is similar in detail to previous work [16], but is approximately 10 dB/km higher from low to high frequencies. For our measurement distance of 159 m, 10 dB/km corresponds to a 20% increase of the input amplitude spectrum for the WVD 1.1 reference pulse, compared to the WVD 11.2 output pulse.…”

Section: Measurementssupporting

confidence: 77%

“…The reflection from the 30.5 cm diameter telescope mirror M3, with its focus at the transceiver beam waist, collimates the beam with the Rayleigh range of 58.9 m [9], [16]. Because the 25 m short-path is well within the Rayleigh range, the 30 cm amplitude diameter beam remains collimated.…”

Section: Measurementsmentioning

confidence: 99%

“…Because the 25 m short-path is well within the Rayleigh range, the 30 cm amplitude diameter beam remains collimated. However, the returning 186 m long-path Gaussian beam would have a diameter of 95.4 cm at M3 [9], [16]. The corresponding long-path power coupling loss is given by the square of the ratio of the diameter of M3 to the diameter of the incoming beam at M3 (30.5/95.4)=0.320, which is 0.102 [16], equivalent to an additional coupling loss of 9.9 dB.…”

Section: Measurementsmentioning

confidence: 99%

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Long-Path THz-TDS Atmospheric Measurements Between Buildings

Moon

Jeon

Grischkowsky

2015

IEEE Trans. THz Sci. Technol.

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We have measured THz pulse propagation through a 186 m distance for which the THz pulses propagated in the atmosphere between two buildings separated by 79.3 m, with different relative humidity (RH) and weather conditions such as clouds, rain, and snow. The THz pulses propagated through rain falling at 3.5 mm/h and snow falling at 2 cm/h equivalent to 2.0 mm/h rainfall. For calm weather, the transmitted THz pulseshapes and relative transit times were measured to a precision of 0.1 ps. These broadband measurements demonstrate the potential of line-of-sight THz communications, THz sensing, and THz imaging through fog and smoke.

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Section: Measurementssupporting

confidence: 77%

Section: Measurementsmentioning

confidence: 99%

Section: Measurementsmentioning

confidence: 99%

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Long-Path THz-TDS Atmospheric Measurements Between Buildings

Moon

Jeon

Grischkowsky

2015

IEEE Trans. THz Sci. Technol.

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“…2.6(b), from [2], it is shown the discrepancy existent between the well-developed models of microwave (NASA JPL 1 catalogue molecular atmospheric absorption [43] and Liebel model for the continuum [44]), and infrared (HITRAN 2 line catalogue [45] and CKD 3 continuum model [46]). Advances in this area will permit accurate prediction of atmospheric state and phenomena [47], and will establish the proper transmission windows and conditions for THz communications [48].…”

Section: Atmosphere Characterizationmentioning

confidence: 99%

“…Due to the atmospheric absorption, current state of the art points to the use of [37][38][39][40][41][42] inside the Q-band, and [71][72][73][74][75][76] inside the E-band [669], although some previous commercial prospects considered as well [46][47][48][49][50][51][52][53][54][55][56] GHz] in the V-band. Serious commercial proposals indicate as possible geostationary orbits, medium earth orbit, low earth orbit, and Molniya orbit, or in some cases combinations of two of these orbits.…”

Section: Satellite Communicationsmentioning

confidence: 99%

Analysis and design of efficient passive components for the millimeter-wave and THz bands

Verdú¹,

Antonio²

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To my parents, brother and sister."Success is peace of mind which is a direct result of self-satisfaction in knowing you made the effort to become the best of which you are capable."Jonh Wooden "Lo que con mucho trabajo se adquiere, más se ama." Aristóteles AgradecimientosLa realización de esta tesis ha implicado no pocos años de trabajo y esfuerzo. Durante este importante periodo de mi vida han sido muchas las personas han estado a mi lado, brindándome su apoyo, ayuda, cariño y amor. Ya sea de una forma u otra, todas estas personas han contribuido a que este trabajo haya sido posible dando como fruto esta tesis. A todos ellos, me gustaría dedicarles un agradecimiento muy especial de todo corazón.Sin duda alguna, debo dar las gracias en primer lugar a mi director de tesis Mariano Baquero. Mariano, has sido un padre para mí profesionalmente hablando. Te conocí como alumno en las clases de Microondas, en las cuales me abriste la puerta a un conocimiento que me fascinó.Recuerdo perfectamente cuando fui a verte para preguntarte si podrías dirigirme el Proyecto Final de Carrera, y desde ese año 2009 hemos estado trabajando juntos. Quiero agradecerte no sólo haberme dado la oportunidad de trabajar en cada momento en elárea que más me ha gustado, sino el haberte preocupado por mí a nivel personal, velando siempre por mis intereses, ayudándome a desarrollarme personal y profesionalmente. Extiendo en este sentido mi agradecimiento a Miguel Ferrando. Si Mariano es el padre, tu serías sin duda el abuelo. Sin tu ayuda, la beca para la realización de esta tesis y los proyectos que han respaldado la misma no hubieran sido posibles. Tu esfuerzo ha permitido que el Grupo de Radiación Electromagnética (GRE) esté hoy dónde esta y que sus miembros nos beneficiemos de un entorno de trabajo excelente, produciendo trabajo de calidad. Debo agradecerte también tus siempre innovadoras ideas, algunas de las cuales se han convertido en una realidad plasmada en esta tesis.Una mención especial merece Daniel Sánchez. Dani, aunque tu nombre no figure como co-director bien sabes que podría estarlo. Jamás podré agradecerte lo suficiente la ayuda que me has prestado. Cuántas horas dedicadas a enseñarme en un sin fin de aspectos sin esperar nada a cambio, apoyándome también en los momentos difíciles, siempre presentes en una tesis. Bien sabes que lo mismo has hecho con cada uno tus compañeros, por eso eres el pilar del GRE Dani.Otra persona a la que estoy muy agradecido es a Vicente Boria. Tu activa colaboración en la dirección de esta tesis ha sido indispensable para la consecución de los resultados más relevantes de la misma. Sugeriste muy acertadamente una estancia en la Queen's University of Belfast, y me abriste la puerta a nuevas líneas de investigación en las cuales seguimos trabajando actualmente. Gracias por preocuparte por mi a nivel profesional y personal.En elámbito anterior, extiendo los agradecimientos a todo el GRE. It is also very important for me to acknowledge Prof. Vince Fusco. Thank you for hosting me in your group in Belfast ...

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Surface Characterization Techniques

Erdogan

Güler

Kilic

et al. 2016

Surface Treatments for Biological, Chemical, and Physical Applications

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The chemical, physical, and morphological features of surfaces play a very crucial role in material properties including wettability, optical, adhesive, mechanical, and so on. Therefore, diagnosis of surface structures is very important for materials science. The properties of natural and fabricated material surfaces can be determined using characterization techniques. In this chapter, some of the most common characterization methods are given. Surface Characterization Methods X-ray Spectroscopy TechniquesThe discovery of X-rays in 1845 by Wilhelm Conrad Rontgen gave rise to significant scientific advancement that benefited a variety of fields by making the invisible to the visible. In 1901, Wilhelm Rontgen received the Nobel Prize in physics for the invention of X-rays. The discovery of X-ray led to significant improvement in the diagnosis for medical applications. In the years subsequent to this discovery, X-rays were used for military applications. Initially, the harmful effects of radiation were not comprehended. Later, it was observed that those who were exposed to X-ray radiation encountered severe burns and skin damages. Thomas Edison's assistant who worked extensively with X-rays, died of skin cancer in 1904. Then, the risk of X-ray radiation was fully understood and this led to the use of protection shields. Today, X-ray technology is being widely employed in numerous fields such as medicine, material analysis, and devices [1].X-rays are electromagnetic energy waves acting like light rays. X-rays have wavelengths in the angstrom range. Furthermore, X-rays are highly energetic and are employed not only to penetrate solids but also to probe their internal structure. As a result of the atom excitation via high energy photons or electrons, an electron is removed from the atom, leading to an electron hole at the inner orbit. These electron holes are filled by outer electrons. As a result

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THz-TDS Characterization of the Digital Communication Channels of the Atmosphere and the Enabled Applications

Cited by 37 publications

References 52 publications

Long-Path THz-TDS Atmospheric Measurements Between Buildings

Long-Path THz-TDS Atmospheric Measurements Between Buildings

Analysis and design of efficient passive components for the millimeter-wave and THz bands

Surface Characterization Techniques

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