The use of microwave filters can be found in many applications in
microwave circuits and telecommunication systems such as radar,
satellite, mobile communications systems. Such systems often
require circuits to be as small as possible and implemented in low
profile topologies such as microstrip lines, slot lines, and coplanar
waveguides. Microstrip is one of the dominant technologies, which
can provide size reduction for microwave circuits.reduction in the overall size of the stepped impedance
low pass filter is proposed in this article. The high impedance line
sections are converted to T-sections and the low impedance line sections
are converted to
-sections. Analysis and design equations for
such conversions are presented. This method accomplishes a prominent
size reduction in sharp response filters with multi-stepped impedance
sections.