محاسبۀ آهنگ جذب ویژه (sar) و عمق نفوذ در مدل های مکعبی سر انسان تحت تأثیر امواج تخت محدودۀ بسامدی m‏hz ۵۰۰ تا mhz ۲۴۵۰

محاسبه نرخ جذب ویژه (SAR) انرژی امواج الکترومغناطیسی در مجاورت فانتوم سر انسان در فواصل مختلف با استفاده از نرم افزار شبیه‌ساز CST

The Ps 80 Mhz Cavities

As part of the preparation of the PS as injector for LHC, two new 80 MHz cavities have been designed and built at CERN. Bunches spaced by 25 ns and less than 4 ns long are required at injection into the SPS. The bunch spacing is obtained with a 40 MHz system installed in the PS in 1996, but the nominal small bunch length will only be obtained with the 80 MHz systems producing a total of 600 kV....

Comparison of 864 MHz and 935 MHz microwave radiation effects on cell culture.

The objective of this study was to compare the effects of 864 MHz and 935 MHz radiofrequency/microwave radiation on the ability of V79 cells to proliferate, form colonies and on their viability. For one, two and three hours, the cells were exposed to the 864 MHz field in a transversal electromagnetic mode cell (TEM) connected with amplifier and to the 935 MHz field in a gigahertz transversal el...

Medium Access Probability of Cognitive Radio Network at 1900 MHz and 2100 MHz

Conventionally fading analysis of wireless LAN or MAN means small scale fading i.e. wide fluctuation of received signal with small variation of time and distance. In analysis of fading channel we consider the received signal in power, voltage or SNR as a random variable then statistical probability density function (pdf) like Rayleigh, Rician or Nakagami-m is used to get the probability of diff...

A 40–550 MHz Harmonic-Free All-Digital Delay-Locked Loop Using a Variable SAR Algorithm

A wide-range all-digital delay-locked loop (ADDLL) is presented to achieve low jitter, low power and process immunity. The variable successive approximation register-controlled algorithm is proposed to eliminate the harmonic-locking issue in wide-range operation. It can also achieve the fast-locking property and closed-loop operation. With the balanced edge combiner, the ADDLL outputs a synchro...

Comparison of bioactivity between GSM 900 MHz and DCS 1800 MHz mobile telephony radiation.

An increasing number of studies find that pulsed Radio Frequency (RF), electromagnetic radiation of both systems of digital mobile telephony, established and commonly used in Europe during the last years, GSM 900 MHz (Global System for Mobile telecommunications) and DCS 1800 MHz (Digital Cellular System), exert intense biological action on different organisms and cells (Hardell et al., 2006; Hy...