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Hongji Duan, Shuping Wang and Jiancheng Tao
Recent research shows that a directional quiet zone from near to far field can be created with a near-field microphone array. However, there is no systematic theoretical analysis of this error-sensing strategy. In this paper, an analytical model of the a...
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Giuseppe Gibertini, Silvano Rezzonico, Marco Rossetti and Alex Zanotti
The present paper describes a test campaign performed to investigate the noise footprint emitted by a helicopter in an idealised urban context, reproducing the approach to an elevated helipad. The test campaign was performed in Politecnico di Milano?s an...
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Jiangkun Gong, Jun Yan, Deren Li, Huiping Hu and Deyong Kong
The calibration method using a pair of different-sized spheres to calibrate radar data in the anechoic chamber can be used in applications widely, such as measuring radar cross-section (RCS) and radar signatures of objects.
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Hanqing Sun and Yuantian Qin
Firstly, the radar cross section (RCS) test results of the stealthy microsatellite of TianXun-1(TX-1) in the anechoic chamber are compared with the RCS numerically simulated by the physical optics method, and the accuracy of the physical optical method i...
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Victoria Ramos, Oscar J. Suárez, Samuel Suárez, Víctor M. Febles, Erik Aguirre, Patryk Zradzinski, Luis E. Rabassa, Mikel Celaya-Echarri, Pablo Marina, Jolanta Karpowicz, Francisco Falcone and José A. Hernández
In this work, the evaluation of electromagnetic effect of Ultra High Frequency Radio Frequency Identification (UHF-RFID) passive tags used in the healthcare environment is presented. In order to evaluate exposure levels caused by EM field (865?868 MHz) o...
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Samuel R. Freeze, Masoud Shirazi, Nicole Abaid, Mark Ford, Alexander Silvis and Dawn Hakkenberg
Ultrasonic bat detectors are useful for research and monitoring purposes to assess occupancy and relative activity of bat communities. Environmental ?clutter? such as tree boles and foliage can affect the recording quality and identification of bat echol...
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Malek Karaim, Mohamed Tamazin and Aboelmagd Noureldin
The Global Positioning System (GPS) provides an accurate navigation solution in the open sky. However, in some environments such as urban areas or in the presence of signal jamming, GPS signals cannot be easily tracked since they could be harshly attenua...
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Victor Mileshin
The paper reviews new experimental technologies for the development of advanced fans with high bypass ratios. Most of those developments are carried out in a highly specialized acoustic test facility available at the Central Institute of Aviation Motors ...
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António Fernando Alves Carneiro, João Paulo N. Torres, António Baptista and Maria João M. Martins
In the present paper, a smart planar electrically steerable passive array radiator (ESPAR) antenna was developed and tested at the frequency of 1.33 GHz with the main goal to control the main radiation lobe direction, ensuring precise communication betwe...
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