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This paper presents a linear phased array antenna with beam steering capability designed for WiFi and LTE mobile standards. The proposed antenna array utilizes 4 elements of patch antenna arranged in a flat configuration. The antenna element used in the array exhibits dual band characteristic covering 2 wide frequency bands; 2.35 GHz to 2.8 GHz (lower band) and 5 GHz to 5.5 GHz (upper band). To excite...
This paper presents a novel bidirectional planar monopole antenna array, with its feeding network, to apply for WiFi/Bluetooth and LTE mobile standards. The planar array is comprised of monopole antenna elements that utilise Archimedean spiral slots, inspired as resonance paths, in order to generate multi-band performance. Contrary to conventional structures, the feeding network is composed of three...
A novel miniaturised reconfigurable, switchable feed network for a four elements dual circularly polarised antenna array is proposed. The four feeds are in phase quadrature to give a phase shift of 90º between each neighbouring antenna element, producing a circularly polarised pattern. The feed network consists of three conventional Wilkinson power dividers which can be individually reconfigured in...
The purpose of this letter is to investigate the sensitivity relative to the antenna position uncertainties (APUs) for multiple-input multiple-output (MIMO) radar with colocated antennas. Manifold study is introduced to MIMO radar virtual array as an analyzing tool. To assess the importance of each antenna in a MIMO radar system, we extend Manikas's sensor importance function to MIMO radar. Furthermore,...
This paper presents a novel one-to-eight compact feeding network based on the Wilkinson power divider for a circular antenna array. The network consists of four 1:2 conventional Wilkinson power dividers. The outputs revolve at 45° in order to satisfy the circular geometry on an FR-4 substrate. Moreover, the network size has been optimized and miniaturized targeting compact portable devices. The feeding...
Many applications meet certain programming patterns like pipeline, fork-join, do-all etc. While tools such as OS threads and OpenMP allow programmers only to express task or data parallelism, special support for programming patterns is distinctly lacking. Intel threading building blocks (TBB) is developed to address this problem, but its scheduler is general and not optimized for any of its parallel...
Concise coding for input plays an important role in neural signal processing. In previous studies, three types of neural signal coding were raised: rate, timing and population coding. By multi-electrode array, the coding of input intensities in cultured hippocampal neuronal networks was examined. In excitatory neuronal network, responses to input intensities focused on the three periods: 1∼10 ms,...
It is generally assumed that the variability of neuronal firing pattern has an important effect on the connectivity of the nervous system, but this effect has not been thoroughly investigated. This challenging research area involves a tight cooperation of neuroscience, computer science, and biomedical engineering among others. In order to share our data and methods with the other experimenters and...
Spontaneous firing play an important role in development of neuronal network. Activity-dependent modification of synaptic efficacy is widely recognized as a cellular basis of learning, memory, and development plasticity. Little is known of the activity-dependent modification of the synchronized spontaneous firing of the hippocampal networks. Long-term recording of spontaneous activity in cultured...
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