EXPERIMENT-3
AIM: Design
microwave strip line in ADS.
A
microstrip is a two conductor transmission line that can be considered to have evolved conceptually from two wire line as shown in figure. It consists
of a single conducting strip of
width (w) placed on a
dielectric substrate of thickness (d) and located on a
ground plane
It is clear from Figure that microstrip involves an abrupt dielectric interface between the
substrate and the air above it. Any transmission line that is filled with a uniform dielectric can support a single, well-defined
mode
of
propagation,
at least
over
a
specified range of frequencies (TEM for coaxial lines, TE for waveguides, etc.).
Transmission lines that do not have such a uniform dielectric filling cannot support a single mode
of propagation; microstrip
is within this category. Although this is true, the bulk of the energy is transmitted along microstrip
with a field distribution
which quite closely resembles TEM; it is usually
referred to as ‘quasi-TEM.’ The detailed
field distribution
is
quite
complicated, but the main transverse electric field can
be visualized as shown in Following Figure.
Design:
Characteristic Impedance
where
Effective width of transmission
line
Design in ADS:
Simulation Results:
LayOut:
Conclusion:
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