>> Now, let's talk about the two Band-pass Filters.
See we have two band pass filters right
here that are coming out of this power splitter.
One is at 2.4 gigahertz and the other is at 2.6 gigahertz,
and that's because we're using these for the zero and the
one of our digital system.
So at the moment,
we don't know if our signal is 2.4 or 2.6 gigahertz gets one or the other.
So we have a filter at the top,
that's 2.4 and so at the bottom that passes 2.6.
If you look really closely,
you will see that these lines that are going
along like this are not actually attached,
see there's actually a hole between
these two lines look really closely and see if I can zoom in on that.
You are here to see those lines really are not attached.
The signal goes through because it's high frequency and it
actually couples across these capacitive gaps,
each of these gaps are capacitive.
When we model these filters or when we design them,
they are a series of inductors and capacitors.
This is actually a picture of how those circuits are designed.
They are capacitor, inductor, capacitor, inductor and so on.
You'll learn to design these circuits when you take
a good signal processing class and to
build them in this particular form in microwave engineering.
But they are just a series of inductors and
capacitors that make up a band-pass filter.