Prepare by: Peter Huang Date: 07/21/2005

1. 52-5120 Training Course - Passive Component Design -Coupler/Power divider Prepare by: Peter Huang Date: 07/21/2005

2. Contents • Directional Coupler • Measuring Coupler Directivity • Lenge Coupler • Lenge Coupler example • The Wilkinson Power Divider • The Quadrature (90º) Hybrid • Homework exercise 2

3. Input Through Coupled Isolated 2 21 Directional Coupler(1)

4. Directional Coupler(2) Directional Coupler Design Step: Step 1: According to “Coupling Factor” to decide “Even mode Impedance” and “Odd mode Impedance” Coupling factor decide by designer Odd mode Impedance Even mode Impedance

5. Directional Coupler(3) Step 2: According to “Even mode Impedance” and “Odd mode Impedance” to calculate the Wide and Gap width of Coupling line http://www.ee.bilkent.edu.tr/~microwave/programs/magnetic/dcoupler/dcoupler.htm

6. Directional Coupler(4) Step 3: To design the Length of parallel line Odd mode Wavelength Even mode Wavelength the Length of parallel line Step 4: According to w, s, and l to simulation the directional coupler by Microwave Office2000

7. Pc Load C Vi,Pi Pmax, Pmin Sliding Load C/D C Vi,Pi Measuring Coupler Directivity Directivity : D

8. Lenge Coupler

9. Lenge Coupler-example

10. Lenge Coupler Simulation

11. The Wilkinson Power Divider 100 ohm

12. 1 2 3 The Quadrature (90º) Hybrid

13. Homework exercise 2 • Design Directional Coupler Design • Regarding to your sustaining product to design one directional coupler • By paper or power point Or • Design Divider/ Quadrature (90º) Hybrid • Regarding to your sustaining product to design one divider or 90 hybrid • By paper or power point

14. References • David M. Pozar, “Microwave Engineering” • http://www.comm.ttu.edu.tw/chu/e-medi@waves.htm • http://www.ee.bilkent.edu.tr/~microwave/programs/magnetic/dcoupler/dcoupler.htm • http://www.rfic.co.uk • RF, RFIC & Microwave Theory, Design