08 Dividers-n-Couplers-p-1 - Topic: POWER DIVIDERS AND...

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1 Topic: POWER DIVIDERS AND COUPLERS Concepts: T-junction power divider (Pozar sec. 7.2), Wilkinson Power divider (Pozar sec. 7.3), Design of coupled striplines and microstrip lines (Pozar Section 7.6) Part II: Passive Circuit Design Impedance Matching Circuits Directional Couplers Power Dividers Resonators Filters Circuit Elements T-junction Wilkinson PD 2 PD 3 PD 1 Three-port Network Properties Lossless T-junction Power Divider T-junction (Lossless divider) PD 1.1 0 2 1 1 1 1 Z Z Z jB Y in = + + = Input Matching Condition 0 = B 0 2 1 1 1 1 Z Z Z = + o o in Z V P 2 2 1 = 1 2 1 2 1 Z V P o = 2 2 2 2 1 Z V P o = Input Power Output Power in P P 3 1 1 = in P P 3 2 2 = = 50 o Z = = 150 3 1 o Z Z = = 75 2 3 2 o Z Z = = 50 || 2 1 Z Z Z in Power Divider EXAMPLE 7.1 2 : 1 Input Port is matched Input Impedance Ingoring the junction reactance = = 30 || 2 1 Z Z Z o in = = 5 . 37 || 1 2 Z Z Z o in 0 = + = Γ o in o in Z Z Z Z Output Ports are not matched Input Port Output Port 1 Output Port 2 Reflection Coefficient 333 . 0
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This note was uploaded on 12/19/2009 for the course ELECTRONIC elm 421 taught by Professor Arifergin during the Fall '09 term at Gebze Institute of Technology.

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08 Dividers-n-Couplers-p-1 - Topic: POWER DIVIDERS AND...

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