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Some sleep disorders, such as sleep apnea, restless legs syndromes (RLS), and periodic limb movement disorder (PLMD), require a full-night sleep monitoring for diagnosis. Conventional sleep monitoring devices are disturbing and inconvenient for daily scene applications. In this poster paper, we propose a sleep monitoring system by embedding RFID tags into bed cloth and realize two main functions:...
A novel design of a compact antenna array for MIMO (multiple input multiple output) communication systems is introduced for mobile applications, which require in particular a low profile of the antennas. The proposed antenna array can be integrated at the contour of mobile terminals. The antenna array operates in two frequency bands around 2.45 GHz and 5.5 GHz, corresponding to the WLAN (wireless...
Recently, we demonstrated a TiN/TaOx/HfO2/TiN RRAM [1]. The Conductive Metal Oxide (TaOx) acted as an in-built current compliance layer and improved thermal efficiency too, leading to high-quality RRAM characteristics [1]. In this work, we report excellent resistance uniformity and endurance for these TiN/TaOx/HfO2/TiN RRAMs and present techniques to optimize switching and data retention. An oxygen...
Wire-array Z pinch has been proved to be the most powerful X-ray sources in laboratory with crucial applications in many fields. Much effort has been devoted for better understanding of its physical process via the approaches of numerical simulation as well as experimental investigation. As is well known, the dynamics of plasma is greatly influenced by the magnetic field, hence the numerical calculation...
Indoor visible light communication (VLC) techniques are expected to utilize LED based infrastructure to provide data transmission and general illuminance. To ensure full coverage of a lighting area, multiple LED lamps must be employed. Each lamp consists of an array of LEDs. In typical VLC channel modeling, each array is usually treated as a single point source. This simplification offers very low...
Compact antenna arrays are more and more used in mobile terminals with MIMO technology. However, mutual couplings between the radiation elements degrade the performance of arrays with respect to radiation efficiency, diversity, impedance matching and so on. In this paper, a simple compact three-element printed diversity array operating around 6 GHz is designed and measured. This array consists of...
According to the characteristics of composite materials and its possible application working environment, to make sure of using the c0mpound material safely, through a method to test the defect of compound material is quite important. With the development of electronic technology, ultrasonic phased array is gradually used in industry nondestructive testing. This article analyses the advantages of...
The compactness of antenna arrays is highly restricted due to the mutual coupling effect between radiation elements, which degrades the arrays' performances with respect to impedance matching, radiation efficiency, and antenna diversity. A two-port compact printed monopole antenna array with a novel and simple decoupling structure based on partially extended ground plane applicable for small terminals...
The design of a highly compact four-element monopole antenna array operating at 2.45 GHz is provided. The four radiation elements are symmetrically placed and the minimum distance between them is 0.07λ. The input ports are decoupled by a simple decoupling network, which is a one-layer printed circuit board only containing transmission lines on low-cost FR 4 substrate. The proposed array shows good...
A novel near-field source localization algorithm based on fourth-order cumulant is proposed in this paper. The array manifold matrix is estimated using subspace method at first, and then the automatically paired DOA and range parameters can be obtained using least squares estimation. The proposed method requires only one fourth-order cumulant matrix and does not need any multidimensional search or...
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