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Conductor‐loss reduction for high‐frequency transmission lines based on the magnetorheological‐fluid polishing method
Author(s) -
Lee SangNo,
Lee JoonIk,
Kim WookBae,
Yook JongGwan,
Kim YongJun,
Lee SangJo
Publication year - 2004
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20318
Subject(s) - magnetorheological fluid , polishing , conductor , materials science , return loss , microwave , transmission line , microelectromechanical systems , electrical conductor , surface roughness , electroplating , composite material , acoustics , electronic engineering , optoelectronics , electrical engineering , engineering , structural engineering , physics , telecommunications , damper , layer (electronics) , antenna (radio)
In this paper, a novel polishing method using magnetorheological (MR) fluid is presented in order to improve conductor‐surface roughness and achieve high‐frequency performance of the electroplated three‐dimensional (3D) CPW, where the MR fluid is utilized to efficiently polish uneven and imperfect conductor surfaces resulting from the widely used MEMS process. For the purpose of comparison, two 50Ω CPW lines on glass substrate are fabricated in order to validate the performance of the proposed polishing scheme. From the measurement, the polished CPW lines using the MR fluid show much lower attenuation constants up to a maximum of 0.3–0.54 dB/cm than unpolished CPW lines, according to the geometries used. Thus, it is clear that the proposed MR fluid‐based polishing scheme is very effective when used to smooth 3D high‐frequency structures and can dramatically improve conductor‐loss characteristics. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 405–407, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20318