High-performance air-buried microstrip lines and Ka-band branch line coupler

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An air-buried microstrip line (ABMSL) is monolithically fabricated on a glass substrate using a cost-effective multilayer process. The insertion loss of the line is 0.07 dB/mm and it shows high-isolation characteristics between close transmission lines. Using the ABMSL, a branch-line coupler is monolithically fabricated. Because the ABMSL structure employs air-dielectric medium and ground conductor walls surrounding a strip conductor line, it is very effective for reducing dielectric loss and parasitic coupling between close transmission lilies over a high-frequency range. The fabricated branch-line coupler shows coupling and transmission losses of 3.6 and 3.9 dB, respectively, at the center frequency of 29 GHz. In the frequency range front 26 to 32 GHz (20% bandwidth), the return loss is below than 15 dB and the isolation is better than 14 dB. (c) 2005 Wiley Periodicals, Inc.
Publisher
JOHN WILEY & SONS INC
Issue Date
2006-01
Language
English
Article Type
Article
Keywords

MILLIMETER-WAVE APPLICATIONS; GAP TRANSMISSION-LINES

Citation

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.48, no.1, pp.167 - 170

ISSN
0895-2477
DOI
10.1002/mop.21295
URI
http://hdl.handle.net/10203/88391
Appears in Collection
EE-Journal Papers(저널논문)
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