Microwave Office Basic Using Steps Speaker:

Design Example Spec. 0.1dB ripple fractional bandwidth ¼ lambda coupled line BPF S11 should smaller than -15dB in the passband FBW=30%

1.Open New Schematic

Enter Schematic s name

2.Choose Unit

Units Press if MKS unit is needed

3.Choose elements Press Elem bottom first

4.Add substrate (Microstrip here ) 1.click substrate 2.Choose MSUB 3.Double click to change the value

Here Al2O3 substrate is used Dielectric constant=9.8 Substrate Thickness=15mil

5.Choose coupled line 1.Coupled lines 2.Drag MCLIN

Hand calculation data for coupled lines Total four ¼ lambda resonators are used here First resonator: line width mil,gap mil,length mil Second resonator: line width mil,gap 2.625mil,length mil Third resonator: line width mil,gap 2.625mil,length mil Fourth resonator: line width mil,gap mil,length mil

6.Connect the coupling lines

7.Add ports Click here

8.Set project frequencies

Set project frequencies cont d Remember to click Apply

9. See the response

See the response cont d Enter graph name

Add measurement

Add measurement cont d Choose measurement type Choose the circuit use dB scale

Result

10. Fine tune the ckt parameters Click here and choose the ckt parameters to tune

Start to tune 1.click tune 2.drag the value to change

Fine tune result

11. Optimize

Optimize (2) 1.choose one measurement to meet the goal 2.Goal type 3.frequency to satisfy goal

Optimize (3) Variables to opt

optimize (4)

optimize (5)

optimize(6)

12. TXL

TXL cont d