نتایج جستجو برای: millimeter wave
تعداد نتایج: 229411 فیلتر نتایج به سال:
1. Introduction Radio on Fiber (RoF) system can provide low-cost and high-performance radio-wave distribution by using remote access units (RAUs) where lightwave modulated by radio-wave is converted to radio-wave by a high-speed photodetector (PD) [1]. In microwave bands, RoF systems are successfully used for mobile services to provide signals to the mobile terminals located at such shadowing a...
Starting with a brief review of millimeter wave research and development, basic concept, theory and applications of NRD-guide technology are described. A particular emphasis is placed on short distance propagation of millimeter waves such as indoor HD-TV wireless transmission and Giga-bit video downloader. It is also emphasized that NRD-guide can offer advantages of easy fabrication, low cost a...
An all-optical generation of a millimeter wave carrier from a multiwavelength Brillouin-erbium fiber laser is presented. Four-channel output with spacing of about 21.5 GHz is generated from the fiber laser by controlling the gain in the cavity. A dual-wavelength signal with spacing correspondent to six orders of Brillouin frequency shift is obtained by suppressing the two channels at the middle...
In this paper, we present a complete high-throughput MIMO receiver for millimeter wave communication. With vast spectrum and small antenna element size, millimeter wave becomes very attractive to support next generation high data rate mobile communication. Besides using transmitter and receiver beamforming to overcome the unfavorable propagation characteristics and to achieve high energy effici...
One region of the electromagnetic spectrum that is relatively unexploited for materials characterization is the millimeter wave band frequencies roughly between 40 and 300 GHz . Millimeter wave techniques involve free-space noncontacting measurements which have a length scale that makes them ideal for characterizing bulk properties of multicomponent composites where the scale of homogeneity is ...
This paper reports our progress in developing parallel coupled-line filters based on Si-based VLSI backend interconnects for millimeter-wave applications. The resonant frequency of this coupled-line filter increases with increasing spacing-gap and with increasing IDM thickness. By using high resistivity substrate, the parallel coupled-line band-pass filter is extremely effective in reducing sub...
This paper is an overview of the mm-Wave reflectarrays developed at the LEAT (University of Nice Sophia AntipolisFrance) since October 2004. It addresses several topics: method of conception and design constraints of mmWave reflectarrays, influence and limitations of the reduction of the cell size, design and realization of ultra-low lobe reflectarrays by using prolate horns, design of simultan...
A millimeter wave antenna measurement system is presented. The frequencies of operation are around 100 GHz and 300 GHz (W/J Bands). The facility is a single reflector compact range system. Design tasks deal with the serrated reflector and the corresponding millimeter wave instrumentation design.
Millimeter-wave components were re-examined for high power (Mega-Watt) and steady-state (greater than one hour) operation. Some millimeter-wave components, including waveguide joints, vacuum pumping sections, power monitors, sliding waveguides, and injection windows, have been improved for high power CW (Continuous Waves) transmission. To improve transmission efficiency, information about the w...
This report addresses the research progress towards enabling millimeter-wave full-duplex wireless communication. Millimeter-wave technology has gained significant interest for short-range wireless personal area networks (WPANs), vehicular radar and next generation (5G) cellular communication in the recent years. Full-duplex is another emergent technology which can theoretically double the data ...
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