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http://dx.doi.org/10.5762/KAIS.2011.12.7.3169

An Application of Artificial Dielectric Substrate for Design of Size-reduced Directional Couplers  

Lim, Jong-Sik (Department of Elec. and Comm. Eng, Soonchunhyang University)
Koo, Ja-Kyung (Department of Elec. and Comm. Eng, Soonchunhyang University)
Lee, Jun (Department of Elec. and Comm. Eng, Soonchunhyang University)
Lee, Jae-Hoon (Department of Elec. and Comm. Eng, Soonchunhyang University)
Ahn, Dal (Department of Elec. and Comm. Eng, Soonchunhyang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.12, no.7, 2011 , pp. 3169-3175 More about this Journal
Abstract
This paper describes the design of size-reduced directional coupler using the artificial dielectric substrate and its increased effective permittivity. Directional couplers are widely used in measuring RF power indirectly and coupling signal power. Artificial dielectric substrates have higher effective dielectric constant than standard dielectric substrate due to the lots of metalized via-holes, and the increased effective permittivity results in size-reduction of circuits. As a design example, 15dB directional couplers are designed on the standard substrate and artificial dielectric substrate and their size are compared. The size of the directional coupler using the artificial dielectric substrate is only 1/3 of that designed using the standard substrate, while the performances are preserved. In addition, the measured performances of the size-reduced coupler are well agreed with the simulated ones. The measured coupling coefficient, matching, and insertion loss at 2GHz are -14.62dB, -24.1dB, and -0.38dB, respectively.
Keywords
Directional couplers; Artificial dielectric substrate; ADS; Microstrip;
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Times Cited By KSCI : 1  (Citation Analysis)
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