Title :
A tunable group delay circuit for time delay matching applications in communication systems
Author :
Chaudhary, Girdhari ; Park, Sungdoo ; Jeong, Yongchae ; Lim, Jongsik ; Lee, Jun
Author_Institution :
Div. of Electron. & Inf. Eng., Chonbuk Nat. Univ., Jeonju, South Korea
Abstract :
In this paper, a reflective type tunable group delay circuit (TGDC) is proposed. The proposed TGDC consists of a 3 dB 90° hybrid coupler and reflective type resonators. The design equations of the proposed TGDC have been derived using port reduction method and validated by simulation and experimental results. In order to show the validity of the proposed TGDC, the simulation and an experiment were performed for a wideband code division multiple access (WCDMA) downlink band operating at 2.11~2.17 GHz. According to the experiment, the group delay (GD) time variation of 3±0.17 ns over bandwidth of 60 MHz with an excellent flatness is obtained.
Keywords :
code division multiple access; delay circuits; WCDMA downlink band; bandwidth 60 MHz; communication systems; design equations; frequency 2.11 GHz to 2.17 GHz; hybrid coupler; port reduction method; reflective type resonators; reflective type tunable group delay circuit; time delay matching; wideband code division multiple access; Capacitance; Delay; Frequency measurement; Inductance; Insertion loss; Loss measurement; Microwave communication; Tunable group delay circuit; delay matching; resonance circuit; varactor diode;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
