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Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:03.15,Default,,0000,0000,0000,,>> Now, let's talk about\Nthe two Band-pass Filters.
Dialogue: 0,0:00:03.15,0:00:05.37,Default,,0000,0000,0000,,See we have two band pass filters right
Dialogue: 0,0:00:05.37,0:00:07.50,Default,,0000,0000,0000,,here that are coming out\Nof this power splitter.
Dialogue: 0,0:00:07.50,0:00:11.60,Default,,0000,0000,0000,,One is at 2.4 gigahertz and\Nthe other is at 2.6 gigahertz,
Dialogue: 0,0:00:11.60,0:00:14.46,Default,,0000,0000,0000,,and that's because we're using\Nthese for the zero and the
Dialogue: 0,0:00:14.46,0:00:18.36,Default,,0000,0000,0000,,one of our digital system.
Dialogue: 0,0:00:18.36,0:00:19.83,Default,,0000,0000,0000,,So at the moment,
Dialogue: 0,0:00:19.83,0:00:24.81,Default,,0000,0000,0000,,we don't know if our signal is 2.4 or\N2.6 gigahertz gets one or the other.
Dialogue: 0,0:00:24.81,0:00:26.42,Default,,0000,0000,0000,,So we have a filter at the top,
Dialogue: 0,0:00:26.42,0:00:30.57,Default,,0000,0000,0000,,that's 2.4 and so at\Nthe bottom that passes 2.6.
Dialogue: 0,0:00:30.57,0:00:32.07,Default,,0000,0000,0000,,If you look really closely,
Dialogue: 0,0:00:32.07,0:00:33.84,Default,,0000,0000,0000,,you will see that\Nthese lines that are going
Dialogue: 0,0:00:33.84,0:00:35.66,Default,,0000,0000,0000,,along like this are not actually attached,
Dialogue: 0,0:00:35.66,0:00:37.59,Default,,0000,0000,0000,,see there's actually a hole between
Dialogue: 0,0:00:37.59,0:00:41.10,Default,,0000,0000,0000,,these two lines look really closely\Nand see if I can zoom in on that.
Dialogue: 0,0:00:41.10,0:00:44.63,Default,,0000,0000,0000,,You are here to see those lines\Nreally are not attached.
Dialogue: 0,0:00:44.63,0:00:47.48,Default,,0000,0000,0000,,The signal goes through because\Nit's high frequency and it
Dialogue: 0,0:00:47.48,0:00:50.24,Default,,0000,0000,0000,,actually couples across\Nthese capacitive gaps,
Dialogue: 0,0:00:50.24,0:00:51.95,Default,,0000,0000,0000,,each of these gaps are capacitive.
Dialogue: 0,0:00:51.95,0:00:56.40,Default,,0000,0000,0000,,When we model these filters\Nor when we design them,
Dialogue: 0,0:00:56.40,0:00:59.66,Default,,0000,0000,0000,,they are a series of\Ninductors and capacitors.
Dialogue: 0,0:00:59.66,0:01:02.78,Default,,0000,0000,0000,,This is actually a picture of\Nhow those circuits are designed.
Dialogue: 0,0:01:02.78,0:01:06.72,Default,,0000,0000,0000,,They are capacitor, inductor,\Ncapacitor, inductor and so on.
Dialogue: 0,0:01:06.72,0:01:09.16,Default,,0000,0000,0000,,You'll learn to design\Nthese circuits when you take
Dialogue: 0,0:01:09.16,0:01:11.45,Default,,0000,0000,0000,,a good signal processing class and to
Dialogue: 0,0:01:11.45,0:01:14.34,Default,,0000,0000,0000,,build them in this particular form\Nin microwave engineering.
Dialogue: 0,0:01:14.34,0:01:16.61,Default,,0000,0000,0000,,But they are just a series of inductors and
Dialogue: 0,0:01:16.61,0:01:20.70,Default,,0000,0000,0000,,capacitors that make up a band-pass filter.