Design of a wide-band filter for IF anti-aliasing

In order to supply spectrum analyzers with a wide-band filter of IF anti-aliasing, a method is introduced to design a more effective IF anti-aliasing filter for the un-buffered analog-to-digital converters (ADCs) with a switched-capacitor front end. With obtaining the sampling spectrum, the specifications of the filter are given to each module before design and simulation. The experiment results show that the specifications of every tested module achieve the demands. Compared with traditional methods for an IF anti-aliasing filter, this method have high out-band rejection and wider band.