Design of Multi-Band Dispersive Delay Line

• Main Authors: Chen-yuan Yen, 顏楨原
• Other Authors: Ching-Wen Hsue
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/99420713110024046186

碩士 === 國立臺灣科技大學 === 電子工程系 === 104 === Three configurations of microstrip Dispersive Delay Line (DDL) are presented in the thesis. The three types of DDL are one single-banded Dispersive Delay Line operated at 2.7 GHz central frequency, one dual-banded Dispersive Delay Line operated at 0.9/1.14 GHz central frequencies and one tri-banded Dispersive Delay Line operated at 0.9/1.14/2.7 GHz central frequencies, respectively. Both simulation results and implementation results are given to validate the design in this thesis. The design philosophies of each Dispersive Delay Line are depicted as follows: 1. Single-band DDL is implemented by paralleling two asymmetric open-circuited single-stubs using Induced Pass-band technique. 2. Dual-band DDL adopts Discrete-Time Z Domain technique and Equal-Length, Two-Section Stub scheme. By paralleling three Equal-Length, Two-Section Stubs, the Dual-band DDL is developed. 3. Tri-band DDL is synthesized by integrating the single-band DDL and dual-band DDL into one circuit and executing the circuit optimization process. The circuit sizes without 50Ω main line of the proposed single-band DDL, dual-band DDL and tri-band DDL are 9.84 X 14.25 mm2, 47.28 X 14.02 mm2 and 48.39 X 26.33 mm2, respectively. Comparing with other design schemes, the presented DDLs in this thesis provide more excessive group delay, simpler profile and compact size. Furthermore, Equal-Length, Two-Section Stub scheme extends upper harmonic and gives more flexibility in selecting the operation frequency during design.