نتایج جستجو برای: s22
تعداد نتایج: 325 فیلتر نتایج به سال:
In this work 0.18 μm CMOS is used to achieve low-characteristics and best performance of in the band of 2.4 GHz to 6.0 GHz. Here simulation tool is used for simulation of lumped components with an inductor less concept. Designed broadband LNA supports multi standard wireless applications with High gain and low noise figure. Due to the accurate calculation and the proper impedance matching, the ...
The variation of the optical absorption of carbon nanotubes with their geometry has been a long-standing question at the heart of both metrological and applicative issues, in particular because optical spectroscopy is one of the primary tools for the assessment of the chiral species abundance of samples. Here, we tackle the chirality dependence of the optical absorption with an original method ...
This work presents a 2.4 GHz low noise amplifier (LNA) for wireless sensor network in CMOS 0.13-μm Silterra process. The forward body bias technique with cascode configuration has been adopted in order to implement a suitable LNA for low power consumption target. The supply voltage was varied from 0.4 V to 0.6 V as to optimize the tradeoffs for LNA performances. The simulation results show that...
Semiempirical orthogonalization-corrected methods (OM1, OM2, and OM3) go beyond the standard MNDO model by explicitly including additional interactions into the Fock matrix in an approximate manner (Pauli repulsion, penetration effects, and core-valence interactions), which yields systematic improvements both for ground-state and excited-state properties. In this Article, we describe the underl...
P. Keppler and J. Major MPI für Metallforschung, Stuttgart, Germany (Received 15 July 1997) The first results from an experiment to deflect a beam of fully stripped, ultrarelativistic Pb821 ions of 400 GeVyc per unit of charge, equivalent to 33 TeVyc, by means of a bent crystal are reported. Deflection efficiencies are as high as 14%, in agreement with theoretical estimates. In a second experim...
We introduce generator blocking sets of finite classical polar spaces. These sets are a generalisation of maximal partial spreads. We prove a characterization of these minimal sets of the polar spaces Q(2n, q), Q(2n + 1, q) and H(2n, q), in terms of cones with vertex a subspace contained in the polar space and with base a generator blocking set in a polar space of rank 2. keywords: partial spre...
This paper presents the design and simulation of a 2.4 GHz ISM band front end single stage Low Noise Amplifier (LNA) for wireless transceiver system. This amplifier uses AVAGO ATF-54143 transistor which is a low noise and high dynamic range Pseudomorphic high electron mobility transistor. The proposed method is addressed to optimize noise performance and power efficient while maintaining good i...
We have identified stable fourfold coordinated vacancy clusters Vn 3 n 18 in Si using a combination of metropolis Monte Carlo, tight-binding molecular-dynamics, and density-functional theory calculations. Our calculations show that the small vacancy defects exclusively favor fourfold coordination thermodynamically rather than hexagonal ringlike structure formation, which has widely been adapted...
This work proposes a substrate integrated waveguide (SIW) power divider employing the Wilkinson configuration for improving the isolation performance of conventional T-junction SIW power dividers. Measurement results at 15GHz show that the isolation (S23, S32) between output ports is about 17 dB and the output return losses (S22, S33) are about 14.5 dB, respectively. The Wilkinson-type performa...
This paper presents the design of a reconfigurable Low-Noise Amplifier (LNA) for the next generation of wireless hand-held devices. The circuit, based on a lumped-approach design and implemented in a 90nm standard RF CMOS technology, consists of a two-stage topology that combines inductive-source degeneration with MOS-varactor based tuning networks and programmable bias currents, in order to ad...
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