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Coupler Devices and Technology

저작시기 2008.03 |등록일 2010.04.02 파워포인트파일MS 파워포인트 (pptx) | 28페이지 | 가격 2,900원

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Coupler Devices and Technology에 관한 세미나 ppt자료 입니다.

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5.3 3 port, 4 port networks and components
5.3.1 Wilkinson Power Divider
5.3.2. Coupled microstrip
5.3.3 Branch line coupler
5.3.4 Lange Coupler
5.3.5 Balun
5.3.6 Two Conductor Transformer
5.3.7 Analysis of Transmission line Auto Transformer

본문내용

5.3.1 Wilkinson Power Divider
Power splitter / combiner
with lumped elements : -impedance at outputs
-isolated
For equal power split
For high frequency
Wilkinson power splitter / combiner
unequal power splitter
When K = 1
General property of 4 port network
Branch Directional Coupler and Quadrature Hybrid
1800 hybrid
5.3.2. Coupled microstrip
- parallel edge coupled line
1
2
3
4
out of phase
reverse coupling
maximum
Even mode : Zoe
Odd mode : Zoo
Coupling factor = CdB
= 20log10(voltage coupling factor)
= -20log10Co
Normalized even mode impedance
Zoe =
Normalized odd mode impedance
Zoo =
Check a loosely coupled line
Zo = (ZoeZoo)1/2 ~ 50
Example -10 dB coupling h= 0.25mm f = 1 GHz design microstrip coupler
Co = 0.32 Zoe = = 1 Zoe = 1.4 x Zo =70
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