讲座内容：Dispersion is a physical phenomenon which states that signals of different frequencies to suffer different time delays. As a result, a wave package of signal having different frequencies will be distorted after it propagates through a finite length of a medium. Thus, dispersive effect is generally treated as an undesirable noise in most microwave communications.
In this presentation, we elaborate on the dispersive microstrip transmission lines whose dispersion behavior is controllable. Some basic microstrip dispersive lines featured with controllable dispersion and all-pass characteristic will be presented. The plausible applications to microwave analog signal processing including TDMA and FDMA will be addressed. These schemes are generally feasible in the baseband signal processing arenas and we bring it up to RF frequency. The other possible application to microwave radar pulse amplification will also be discussed.
徐敬文教授目前系IEEE fellow, 台湾科技大学电子工程系讲座教授，台湾内政部、经济部、交通部、教育部、国科会、NCC等科技计划评审委员。曾任美国贝尔（AT&T Bell）实验室研究员，台湾科技大学电子工程系主任。研究方向包括无线通信、电磁波工程、前瞻电磁理论等。