Design of Elliptic Function Low-Pass Filter and its Application to Frequency Synthesizer
Zhou Nie · Piezoelectrics and Acoustooptics · 2011
An elliptic function low-pass filter has been designed by using the Ansoft tool of filter synthesis.Comparing with Tchebyshev low-pass filter,the elliptic function low-pass filter has better out-of-band suppression and smaller size in the same order.The adjustment of the out-of-band suppression pole of the elliptic function low-pass filter has been introduced in this paper;and the out-of-band suppression deterioration owing to Q factor of the inductor has been also calculated.The Elliptic Low-Pass Filter can be widely used in microwave frequency synthesizer such as frequency multiplier and down convertor etc..