نتایج جستجو برای: radio frequency identificationprinted circuit boards
تعداد نتایج: 657311 فیلتر نتایج به سال:
Printed Circuit Board (PCB) is an essential component of almost all electrical and electron ic equipments. The rapid growth of the use of such equipments has contributed enormously to the generation of large quantity of waste PCBs. The WPCBs not only contain valuable metals but also a large variety of hazardous materials. Conventional treatments of such WPCBs have their own limitations. By pyro...
Printed circuit boards (PCBs) can be found in any piece of electrical or electronic equipment: nearly all electronic items, including calculators and remote control units, contain large circuit boards; an increasing number of white goods, as washing machines contains circuit boards for example in electronic timers. PCBs contain metals, polymers, ceramics and are manufactured by sophisticated te...
Due to the increasing complexity of circuit boards, testing loaded boards is becoming prohibitively expensive and more difficult to perform. Board complexity has resulted from the rapid development of surface-mount technology and from the use of multilayered boards. Finer pin spacing and the use of double-sided boards also have contributed to the increased cost and difficulty of traditional tes...
In modern printed electronics, the performances of a circuit and a device are severely deteriorated by the electromagnetic noise in the gigahertz (GHz) frequency range, such as the simultaneous switching noise and ground bounce noise. A compact and multi-stack electromagnetic bandgap (CMS-EBG) structure is proposed to suppress the electromagnetic noise over the GHz frequency range with a short ...
Ultra-Wideband (UWB) is a wireless communication technology that can be utilized for precise indoor positioning system. UWB low power-consuming and resistant to complex multipath environments, thanks short pulse signal. Since the main desired characteristics of antennas radio-frequency localization systems are wide bandwidth, omnidirectional radiation pattern, profile simple integration with pr...
The problem of identifying disturbance lines in printed circuit boards is addressed. Identification is achieved by estimating the disturbance frequency and the separation distance between the coupled lines. Frequency estimation uses a wavelet coefficients thresholding method to reconstruct the interference caused by the disturbance line. The separation distance is computed using two empirical l...
Recent advances in the Micro Electro-Mechanical System (MEMS) technology have made wireless MEMS accelerometers an attractive tool for Structural Health Monitoring (SHM) of civil engineering structures. To date, sensors' low sensitivity and accuracy--especially at very low frequencies--have imposed serious limitations for their application in monitoring large-sized structures. Conventionally, t...
Although traffic safety continues to improve overall, fatalities of vulnerable participants and pedal cyclists specifically have reached 30-year highs. While automotive radar sensors continue advance are integrated in more vehicles, they not ideally suited detect cyclists, especially complicated scenarios. To mitigate the problem lower radar-cross Section (RCS) cyclist, equipping them with harm...
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