%0 Journal Article %T Variation of Impedences in Impatt Diode at High Frequencies %A Joydeep Sengupta %A Dr. Monojit Mitra %J International Journal of Electronics and Computer Science Engineering %D 2012 %I Buldanshahr : IJECSE %X A small introduction of Impatt diodes is presented. Then the measurement of impedences are taken at different frequencies and are compared. For comparison a noise figure of 20dB is taken into consideration. The area of diode taken is 10^-4 cm^2. The input power given is 50000 watts per square cm. At the end , graphs are plotted showing the variations. From the graph we can say the variation of impedances with various parameters and from the we can get an idea about noise. %K IMPATT DIODE %K TRANSMITTENCE %K IMPEDENCE %U http://www.ijecse.org/wp-content/uploads/2012/08/Volume-1Number-4PP-2015-2019.pdf