نتایج جستجو برای: satellite radiator
تعداد نتایج: 81427 فیلتر نتایج به سال:
in this paper, an interference management for multi-beam satellite network to enhance spectral efficiency is studied. first, a two-satellite for future generation satellite network using cognitive radio technology is provided.this network is composed of a secondary satellite and aprimary satellite where the primary satellite system does not suffer from severe destructive interferences coming fr...
We measured the timing resolution of TOF counters by means of Cherenkov-light detection with a Micro-Channel Plate PhotoMultiplier Tube, and attained sTOF 1⁄4 6:2 ps using 3GeV=c pion-beams with a readout electronics of 4.1 ps resolution. The optimum radiator thickness was examined and the detectable number of photo-electrons was analyzed. r 2006 Elsevier B.V. All rights reserved. PACS: 85.60.H...
A dual-band Planar inverted-F antenna (PIFA) for wireless applications has been presented in this paper. The proposed antenna is compact in size and design on FR4 substrate. The antenna consists of a slotted radiator supported by shorting walls and a small ground plane. Square shaped slot in radiating patch have been used to introduce dual band operation into the proposed antenna. The structure...
In this paper recent developments of RF front-end system based on the active integrated antenna design concepts are presented. Thanks to the enhancements in the design of special antennas working as radiator as well as providing the other circuit functionalities, the antenna-integrated RF front ends have been capable of improving the circuit-efficiency and compactness. These enhancements are il...
Lead can be an ideal medium for the detection and study of neutrinos. Such a detector may be realized through the use of a lead perchlorate (Pb(ClO4)2 ) solution as a Cerenkov radiator. The basic physical properties of lead perchlorate solution are given and preparation of the solution for use in a Cerenkov detector is described. Results from investigations of light transmission in lead perchlo...
A scanning beam profile monitor is described that was developed for use along the Stanford two-mile linear accelerator. The maximum beam loss due to scattering caused by this monitor can be made to be a small fraction of that which would be caused by a Cerenkov radiator or scintillating screen. (To be submitted to the Review of Scientific Instruments) * Work supported by the U. S. Atomic Energy...
This paper presents the design and simulation of a typical Ka band satellite beacon receiver for propagation experimentation. Using satellite beacon signal as a reference signal in satellite wave propagation study, is one of the most important methods. Satellite beacons are frequently available for pointing large antennas, but such signals can be used for measuring the effect of natural phenome...
Nowadays, the MIMO can achieve fifth generation (5G) ultra-high capacity, but it is a great challenge for smartphone antenna to good isolation, high efficiency, and other performance in limited space. The paper designed completed an eight-port dual-polarized high-efficiency shared-radiator working 3.5 GHz (3.4–3.6 GHz) 5G mobile devices. two elements are regarded as one building block share rad...
The new type of ring-imaging Cherenkov detector technology called Dirc (an acronym for Detection of Internally Reflected Cherenkov (Light)) has been used successfully for hadronic particle identification in the BABAR experiment at the B Factory (PEP-II) located at the SLAC National Accelerator Laboratory. This paper describes the R&D for and the construction of the Dirc radiator bars and the pe...
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