== Realizing a Microstrip Version of the Coupled Line Bandpass Filter==
[[File:RF99.png|thumb|580px|The RF.Spice schematic of the coupled microstrip bandpass filter.]]
Build your microstrip circuit using four "Coupled Mirostrips" parts with the [[parameters]] specified in the above table. You can access the part from '''Menu > [[Transmission Lines]] > Physical [[Transmission Lines]] > Coupled Microstrips'''. Connect the four parts in a cascaded fashion as shown in the figure below.
Run a network analysis of this two-port circuit. Set the start and stop frequency of the sweep to 1GHz and 3GHz, respectively, with a linear step of 10MHz. Generate an amplitude-only, Cartesian graph of the S-<table><tr><td>[[parameters]]File:RF99. png|thumb|620px|The graphs schematic of s11- and s21 [[parametersthe coupled microstrip bandpass filter.]] are shown in the figure below and agree perfectly with the results of the previous section. </td></tr></table>
Run a network analysis of this two-port circuit with the same [[parameters]] as in the previous section:
{| border="0"
|-
| valign="bottomtop"|[[File:RF101.png |thumb|800px|left|Graph of s11 and s21 parameters of the Coupled Microstrip bandpass filter over the frequency range 1GHz-3GHz.]]
|-
{| class="wikitable"
|-
! scope="row"| Start Frequency
| 1G
|-
! scope="row"| Stop Frequency
| 3G
|-
! scope="row"| Steps/Interval
| 10Meg
|-
! scope="row"| Interval Type
| Linear
|-
! scope="row"| Parameter Set
| S
|-
! scope="row"| Graph Type
| Cartesian (Amplitude Only) with Decibels
|}
The graphs of S11 and S21 [[parameters]] are shown in the figure below and agree perfectly with the results of the previous section with the generic coupled T-Lines.
<table>
<tr>
<td>
[[File:RF101.png |thumb|750px|Graph of s11 and s21 parameters of the Coupled Microstrip bandpass filter over the frequency range 1GHz-3GHz.]]
</td>
</tr>
</table>
<p> </p>
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