Design and Application of Synthetic Quasi-TEM Lines
Date Issued
2006
Date
2006
Author(s)
Wang, Sen
DOI
en-US
Abstract
In this thesis, a new synthetic quasi-TEM (Transverse Electromagnetic) transmission line (TL) is presented. The proposed synthetic TL consists of a two-dimensional array made of complementary-conducting strips (CCS) unit cell, which permits tuning for desired propagation characteristics of the transmission line under synthesis. Based on the particular case study, both theoretical and measured results agree excellently for the comparative studies for the proposed synthetic TL and the conventional microstrip. The Zc of a synthetic TL is 130% higher than that of a wide microstrip. Furthermore, the extracted slow-wave-factor is 17.7% higher than the physical limit of microstrip.
In addition, a Ka-band CMOS rat-race hybrid using the synthetic quasi- TEM TL is proposed. Comparing with the conventional rat-race hybrid, the synthetic TL-based rat-race hybrid features 1) good isolation, 2) reflection loss, and 3) a compact structure. This hybrid incorporates two-dimensional (2D) meandering CCS TL whose size is only 600 x 460 um2 excluding RF pads.
Finally, an X-band VCO combining cross-coupled pair and CCS-TL based inductors topology is proposed. The circuit is fabricated by 0.18-
Subjects
傳輸線
合成波導
Transmission Line
Type
thesis
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