Microwave Office Basic Using Steps

Speaker: 簡智宏

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 usedDielectric 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 hereFirst resonator: line width 8.3125mil,gap 2.4061mil,length 486.6 mil

Second resonator: line width 8.9375mil,gap 2.625mil,length 485.3 milThird resonator: line width 8.9375mil,gap 2.625mil,length 485.3 mil

Fourth resonator: line width 8.3125mil,gap 2.4061mil,length 486.6 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 graphname

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 tosatisfy goal

Optimize (3)

Variables to opt

optimize (4)

optimize (5)

optimize(6)

12. TXL

TXL cont’d