background: estimating dosimetric parameters for small fields under non-reference conditions leads to significant errors if done based on conventional protocols used for large fields in reference conditions. hence, further correction factors have been introduced to take into account the influence of spectral quality changes when various detectors are used in non-reference conditions at differen...

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We demonstrate that diode-switching can be used to introduce frequency agility into antennas produced by thermal transfer printing. Our particular example is a triangular Sierpinski fractal pattern with two PIN diodes to switch between operation optimised for the 800 MHz UHF band (diodes on) and the 2400 MHz ISM band (diodes off). Our measured results show an improvement in S11 in the UHF band ...

institut des sciences et techniques nucleaires de l' universite de teheran - iran pour l'etude de l'effet du temps de recouvrement 'un tripleur de tension nous avons ete conduits a fa ire une etude theorique d'ot nous avons pu tirer une relation entre le temps de recouvrement et les differents parametres de la diode prn. ainsi nous avons montre que la rapidite d'un...