文档介绍：Duplexer Design
RF & work Design Basics
——Master’s Course Seminar
Lecturer: Wu Qun (Prof.,.)
Agenda
z Introduction
z Overview of RF & MW Design Process
z Case Study: RF Front-End
− Duplexer
z Measurement for Design
− Passive Device Characterization
Summary
-2- 硕士学位课系列讲座 March 2003
Duplexer Design
z Duplexer constructed of two separate bandpass filters
z Stopband of one filter must not interfere with passband of
other filter (and vice versa)
z Each filter was measured, work was
designed and simulated using S-parameter data files
work consisted of simple transmission lines
passband of
GHz filter
critical length
non-critical
length
stopband of GHz filter at
passband of GHz filter
-3- 硕士学位课系列讲座 March 2003
Duplexer Filter Measurements
z First attempt: used PC board fixture
z