نتایج جستجو برای: distortion wave

تعداد نتایج: 258678  

Journal: :Physical review 2021

The confined variational method is used to study $S$-, $P$-, and $D$-wave positronium-hydrogen scattering with the energy between 0.068 3.333 eV. Accurate phase shifts $S$-wave lengths are calculated compared other theoretical methods. Existing discrepancies for resolved. According collision momentum, total orbital angular spin configuration, distortion effects of positronium quantitatively stu...

1996
S. BONAZZOLA

Continuous wave gravitational radiation from isolated rotating neutron stars is discussed. The general waveform and orders of magnitude for the amplitude are presented for various known pulsars. The specific case of gravitational radiation resulting from the distortion induced by the stellar magnetic field is presented. Finally some preliminary results about the signal from the whole population...

2004
Ralph Brooker

Abstract In order to achieve optimum service availability, Ka-band gateways must deliver very large effective isotropic radiated power (EIRP) per signal. For most signal types, and for all multicarrier uplinks, uplink power is limited by distortion in the final amplifier. Such distortion may be defined by a number of metrics, including adjacent-channel power ratio (ACPR), noise power ratio (NPR...

Journal: :پژوهش های قرآن و حدیث 0
حسن رضایی هفتادر نویسنده مسؤول، استادیار دانشگاه تهران، پردیس قم فاطمه سروی کارشناسی ارشد علوم قرآن و حدیث

ethan kohlberg, the jewish orientalist and specialist on shi‘a, sees the distortion in holy scriptures, including quran, inevitable. from his point of view, some quranic verses confirm this point. his second proof is the history of the quran and the time when its whole text was written down. in his viewpoint,   hadiths which prove that the quran had been written down in abu bakr’s time ore orie...

Journal: :SIAM J. Imaging Sciences 2009
Semyon Tsynkov

We analyze the effect of dispersion of radio waves in the Earth’s ionosphere on the performance (image resolution) of spaceborne synthetic aperture radars (SARs). We describe the electromagnetic propagation in the framework of a scalar model for the transverse field subject to weak anomalous dispersion due to the cold plasma. Random contributions to the refraction index are accounted for by the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...

Journal: :Optics express 2008
Aniceto Belmonte Joseph Khan

We model the impact of atmospheric turbulence-induced phase and amplitude fluctuations on free-space optical links using synchronous detection. We derive exact expressions for the probability density function of the signal-to-noise ratio in the presence of turbulence. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator sh...

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