Designing a 90 degree branch line coupler.

1. Amjad Yousef Majid
Oct - 22 - 2013
90 Branch Line Coupler

2. Design goal
4 4 ZZ
Z
Z
Z
Z Z 2
Z 2
Amjad Yousef Majid
Branch Line Coupler
Z = 35 Ohm
Matched to
ZL = 50 Ohm
f = 12.5 GHz
1 Oct - 22 - 2013
Amjad Yousef Majid

3. Amjad Yousef Majid
First step - Design
Chosen param.
RO323
Er = 3.02
H = 0.254 mm
Mur = 1
Cond = 5.81e7
T = 17 um
TanD = 0.002
3 Oct - 22 - 2013
Amjad Yousef Majid

4. Amjad Yousef Majid
First step - Layout
4 Oct - 22 - 2013
Amjad Yousef Majid

5. 5
Amjad Yousef Majid
First step - Simulation
Oct - 22 - 2013
Amjad Yousef Majid

6. 6
Amjad Yousef Majid
Second step A - T-junction
Oct - 22 - 2013
Amjad Yousef Majid

7. 7
Amjad Yousef Majid
Second step A - T-junction - Layout
Oct - 22 - 2013
Amjad Yousef Majid

8. 8
Amjad Yousef Majid
Second step A - T-junction - Simulation
Oct - 22 - 2013
Amjad Yousef Majid

9. 9
Amjad Yousef Majid
Third step - T-junction - Matched Load
Oct - 22 - 2013
Amjad Yousef Majid

10. Amjad Yousef Majid
Second step - T-junction - Tunning
Oct - 22 - 2013
10
Amjad Yousef Majid

11. Amjad Yousef Majid
Third step - T-junction - Layout
Oct - 22 - 2013
11
Amjad Yousef Majid

12. Amjad Yousef Majid
Second step B - Design
Oct - 22 - 2013
12
Amjad Yousef Majid

13. Amjad Yousef Majid
Second step B - Layout
Oct - 22 - 2013
13
Amjad Yousef Majid

14. Amjad Yousef Majid
Second step B - Simulation
Oct - 22 - 2013
14
Amjad Yousef Majid