Characteristic Analysis of Transient Ground Impedance with High Frequency Band on the AT Electric Railway Integrated Earthing System

ABSTRACT: The story of the first Italian communications satellite, SIRIO, started in 1968, after the failure of the European project for the vector ELDO-PAS. The story up to the launch in 1977 involved the encumbering legacy of the San Marco satellite's success in the 1960s, political uncertainty in Italy, international economic crises of the 1970s, an overtly complex management system, and an inexperienced aerospace industry. Despite these handicaps, SIRIO won the race with its nearest competitor, the European satellite OTS, which had a similar research aim in the super high frequency band. In addition to collecting a large amount of useful data, SIRIO catalyzed the process for developing an improved organizational structure for Italian space research.

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Nanoelectromagnetic of the N-doped single wall carbon nanotube in the extremely high frequency band

Nanoscale ◽

10.1039/c7nr03674d ◽

2017 ◽

Vol 9 (37) ◽

pp. 14192-14200 ◽

Cited By ~ 6

Author(s):

B. Aïssa ◽

M. Nedil ◽

J. Kroeger ◽

M. I. Hossain ◽

K. Mahmoud ◽

...

Keyword(s):

Electrical Conductivity ◽

Carbon Nanotube ◽

Frequency Band ◽

Electromagnetic Interference ◽

High Frequency ◽

High Electrical Conductivity ◽

High Frequency Band ◽

High Demand ◽

Extremely High Frequency ◽

Minimal Thickness

Materials offering excellent mechanical flexibility, high electrical conductivity and electromagnetic interference (EMI) attenuation with minimal thickness are in high demand, particularly if they can be easily processed into films.

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High-Frequency Band Automatic Mode Recognition Using Deep Learning

2018 IEEE/AIAA 37th Digital Avionics Systems Conference (DASC) ◽

10.1109/dasc.2018.8569367 ◽

2018 ◽

Cited By ~ 1

Author(s):

Zhengjia Xu ◽

Al Savvaris ◽

Antonios Tsourdos ◽

Tareq Alawadi

Keyword(s):

Deep Learning ◽

Frequency Band ◽

High Frequency ◽

High Frequency Band ◽

Automatic Mode ◽

Mode Recognition

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A Compact Printed Monopole Antenna for WiMAX/WLAN and UWB Applications

Future Internet ◽

10.3390/fi10120122 ◽

2018 ◽

Vol 10 (12) ◽

pp. 122 ◽

Cited By ~ 3

Author(s):

Zubin Chen ◽

Baijun Lu ◽

Yanzhou Zhu ◽

Hao Lv

Keyword(s):

Frequency Band ◽

High Frequency ◽

Field Work ◽

Monopole Antenna ◽

Center Frequency ◽

High Frequency Band ◽

Work Requirements ◽

Printed Monopole Antenna ◽

Printed Monopole ◽

Uwb Applications

In this paper, a printed monopole antenna design for WiMAX/WLAN applications in cable-free self-positioning seismograph nodes is proposed. Great improvements were achieved in miniaturizing the antenna and in widening the narrow bandwidth of the high-frequency band. The antenna was fed by a microstrip gradient line and consisted of a triangle, an inverted-F shape, and an M-shaped structure, which was rotated 90° counterclockwise to form a surface-radiating patch. This structure effectively widened the operating bandwidth of the antenna. Excitation led to the generation of two impedance bands of 2.39–2.49 and 4.26–7.99 GHz for a voltage standing wave ratio of less than 2. The two impedance bandwidths were 100 MHz, i.e., 4.08% relative to the center frequency of 2.45 GHz, and 3730 MHz, i.e., 64.31% relative to the center frequency of 5.80 GHz, covering the WiMAX high-frequency band (5.25–5.85 GHz) and the WLAN band (2.4/5.2/5.8). This article describes the design details of the antenna and presents the results of both simulations and experiments that show good agreement. The proposed antenna meets the field-work requirements of cable-less seismograph nodes.

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