ABSTRACT
At the end of this chapter you should be able to:
ž appreciate the purpose of a filter network ž understand basic types of filter sections, i.e., low-pass,
high-pass, band-pass and band-stop filters ž understand characteristic impedance and attenuation of filter
sections ž understand low and high pass ladder networks ž design a low and high pass filter section ž calculate propagation coefficient and time delay in filter
sections ž understand and design ‘m-derived’ filter sections ž understand and design practical composite filters
42.1 Introduction A filter is a network designed to pass signals having frequencies within certain bands (called passbands) with little attenuation, but greatly attenuates signals within other bands (called attenuation bands or stopbands).
