Method for minimizing center frequency shift and linearity errors in YIG filters

A method for minimizing a center frequency shift and linearity errors encountered in a YIG filter, comprising the following steps:

• a) automatically generating data packages in a test unit depending on a user request or containing filter characteristic states and transmitting the data packages to a driver circuit;
• b) adjusting a predetermined voltage level to obtain an adjusted voltage level by means of digital to analog converters contained in a structure of the data packages received by the driver circuit, and transmitting the adjusted voltage level to the YIG filter;
• c) measuring filter characteristics corresponding to the data packages transmitted to the YIG filter in an analyser in a plurality of time periods, to calculate the center frequency shift of the YIG filter, and determining the center frequency shift and the linearity errors;
• d) recording the filter characteristics measured by the analyser in the test unit,
• e) recording updated characteristic filter values recorded in calibration tables in the test unit based on the plurality of time periods;
• f) determining a plurality of control voltage-center frequency regions for the filter characteristics based on the data packages recorded in the test unit and then using the data packages corresponding to a frequency-characteristic, wherein an operator uses the YIG filter at the frequency-characteristic.