Design and Applications of Complementary-Conducting StripTransmission Line on Broadband Circuits

• Main Authors: Po-Jung Chung, 鍾柏榮
• Other Authors: Ching-Kuang Tzuang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/57439582132019107636

碩士 === 國立臺灣大學 === 電信工程學研究所 === 95 === The thesis is to present the complementary-conducting-strip (CCS), which is a type of synthetic quasi-TEM (Transverse Electromagnetic) transmission lines (TL). By utilizing this type of TLs, a CMOS fabrication process of 0.18 um can be realized for the design of transmission line inductors and synthetic TLs, which can be applied to mid-power UWB amplifiers and dual-band VCOs. Applications of the CCS TL on two broadband circuits are provided. The first circuit presents a novel structure which fabricates a 3 ~ 12 GHz amplifier based on lossy match, broadband match and RC feedback technology. This amplifier achieves measured results of 8.7 dB gain, output P1dB 11.2 dBm with good return loss. The design of using the CCS TLs to synthesize the loosy match circuit and broadband technology are discussed. The second circuit presents a dual-band VCO (11/17 GHz). The tuning range of the VCO is 11.2 ~ 12.2 GHz and 16.855 ~ 18.355 GHz for low band mode and high band mode respectively. The phase noise is -113.68 dBc at 1MHz offset in low band mode and -114.48 dBc at 1MHz offset in high band mode. The design and switch of LC tank, in addition with the application of CCS TL on the design of LC tank are discussed. Finally, the conclusion provides strong evidence for the benefits of applying CCS TL technology to practical circuits design on broadband applications.