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In this paper, we present reflection coefficients and penetration losses for common building materials at 28 GHz for the design and deployment of future millimeter wave mobile communication networks. Reflections from walls and buildings and penetration losses were measured for indoor and outdoor materials, such as tinted glass, clear glass, brick, concrete, and drywall at 28 GHz in New York City....
In this paper the design and the results of the investigation into the performance of an embeddable antenna module for civil engineering applications are presented. The module consists of a rectangular microstrip patch antenna, a microstrip inset feed, electronic components such as a rectifier circuit and a protective housing. The housing is used to protect the antenna, the feed and the electronic...
A compact directive dual linear polarized ultra-wideband (UWB) antenna designed for building material analysis (BMA) devices in the frequency range from 2.6 GHz to 4 GHz is proposed. The antenna has a total size of 61 mm2 and a height of 18 mm. The radiation patterns for both polarization directions are symmetrical over a wide bandwidth and radiate perpendicular to the antenna surface. The wave propagation...
Ground penetrating radar non-destructive testing requirements become more demanding. In that respect, it is essential to understand how antenna transfer functions and real system dynamic range affect the amount of retrievable information from measurements. This paper examines the confidence level of linear system transfer functions, and practical aspects of noise floor influence on stepped frequency...
This paper shows measurements of the shielding effectiveness of two commonly used building materials, wood and marble. Of specific interest is the shielding effectiveness of these materials in the 900 MHz and 2.4 GHz regions, the operating frequencies of ZigBee, wireless personal area networks and wireless local area networks. A relatively new method for shielding effectiveness using the reverberation...
New class of radiotransparent materials are presented and discussed in the paper. Basic principles of operation are presented. Preliminary measurements of a block of the new material have been done and are shown in the paper. Reasonably good agreement with predicted data has been achieved. Possible application areas, cost and manufacturing issues are discussed.
Ensuring the appropriate functionality of all the interconnected electric and electronic appliances inside an intelligent building requires an environment where electromagnetic interferences are attenuated so as to eliminate any harmful effects. This paper proposes some straightforward investigation techniques regarding the electromagnetic shielding effectiveness of construction materials. The authors...
This paper reports on the measurements performed for different building materials, different building thickness, different openings and combination of two or all of the variables, that have significant impacts into signal penetration in buildings through experiment setups. Signal strength is measured within the frequency range of 800MHz to 3GHz in the anechoic chamber to determine the signal strength...
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