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ISO 9001 CertifiedMTI
52-5120 Training Course - Passive Component Design
-Coupler/Power divider
Prepare by: Peter Huang
Date: 07/21/2005
ISO 9001 CertifiedMTI
Contents
Directional Coupler Measuring Coupler Directivity Lenge Coupler Lenge Coupler example The Wilkinson Power Divider The Quadrature (90º) Hybrid Homework exercise 2
ISO 9001 CertifiedMTI
Directional Coupler(1)
Input Through
IsolatedCoupled
2 21
ISO 9001 CertifiedMTI
Directional Coupler(2)Directional Coupler Design Step:
Step 1: According to “Coupling Factor” to decide “Even mode Impedance” and
“Odd mode Impedance”
cc
ZZ e 11
00cc
ZZ o 11
00
20/10 Cc Coupling factor decide by designer
Even mode ImpedanceOdd mode Impedance
ISO 9001 CertifiedMTI
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
ISO 9001 CertifiedMTI
Directional Coupler(4)Step 3: To design the Length of parallel line
Odd mode Wavelength Even mode Wavelength
oeff
go
,
0
eeff
ge
,
0
the Length of parallel line
2
)(
41 gegol
Step 4: According to w, s, and l to simulation the directional coupler by Microwave
Office2000
ISO 9001 CertifiedMTI
Measuring Coupler Directivity
Load
Pc
C
Vi,Pi
maxPP
M c
min
max
PP
m
)1
2(
mm
MD
Directivity : DSliding
Load
Pmax, Pmin
C/D
Vi,Pi
C
ISO 9001 CertifiedMTI
Lenge Coupler
ISO 9001 CertifiedMTI
Lenge Coupler-example
ISO 9001 CertifiedMTI
Lenge Coupler Simulation
ISO 9001 CertifiedMTI
The Wilkinson Power Divider
4
02Z
0Z
100 ohm
0Z
ISO 9001 CertifiedMTI
The Quadrature (90º) Hybrid
4
4
20Z
0Z
0Z 0Z
1 2
3RES
R=ID=
100 OhmR1
RES
R=ID=
100 OhmR2
20Z
ISO 9001 CertifiedMTI
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 on
e divider or 90 hybrid By paper or power point
ISO 9001 CertifiedMTI
References
David M. Pozar, “Microwave Engineering” http://www.comm.ttu.edu.tw/chu/[email protected] http://www.ee.bilkent.edu.tr/~microwave/program
s/magnetic/dcoupler/dcoupler.htm http://www.rfic.co.uk
RF, RFIC & Microwave Theory, Design
