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This study analyzes the loss peak frequency of an integrated ferromagnetic noise suppressor by evaluating the demagnetizing field. An integrated ferromagnetic noise suppressor is fabricated using a regular silicon process, and relation between the loss peak frequency and demagnetizing field is evaluated. The demagnetizing factor is calculated by approximating the magnetic film by a slender ellipsoid...
A method to estimate the noise temperature of a noise source by using an auxiliary transmission line (ATL) is proposed and discussed. A cryogenic 7-mm coaxial noise source is developed for verifying the ATL method. The noise temperature is determined from the parameters directly measured by a radiometer and the available power ratio of the transmission line measured by a vector network analyzer using...
A cryogenic noise source (CNS) cooled by liquid nitrogen (LN2) is constructed and evaluated in the frequency range of 8 GHz to 12 GHz (WR-90 waveguide band). A noise temperature of the CNS is changed from the boiling temperature of LN2 by a correction factor (CF) related to loss and temperature distribution of a transmission line (TL). We have investigated the CF by a sliding short method using a...
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