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Microwave Group Delay Time Adjuster Using Resonance Circuit  

Seo Su-Jin (Department of Information & Communication Engineering, Chonbuk National University)
Park Sang-Keun (Department of Information & Communication Engineering, Chonbuk National University)
Choi Heung-Jae (Department of Information & Communication Engineering, Chonbuk National University)
Jeong Yong-Chae (Department of Information & Communication Engineering, Chonbuk National University)
Yun Jae-Hun (Electronics and Telecommunication Research Institute)
Kim Chul-Dong (Sewon Teletech Inc.)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.8, 2006 , pp. 739-745 More about this Journal
Abstract
This paper presents a method to control group delay tine using a resonance circuit. The group delay time adjuster(GDTA) that can control signal group delay time comprises a variable capacitance and a variable equivalent inductor. These are coupled in parallel at a node and also controlled by two bias voltages separately, A variable equivalent inductor is realized a transmission line terminated a variable capacitor. Group delay time can be controlled by change of capacitance and inductance, but the resonating frequency is fixed. When the proposed GDTA is fabricated on RFID Korean frequency band$(908.5{\sim}914 MHz)$, a group delay variation is obtained about 3 ns.
Keywords
Group Delay Time Adjuster; Variable Inductor; Resonance Circuit;
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