1. Improvement of electric power unbalance for asymmetric branch of microstrip line.
- Author
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Takahashi, Eiji, Okano, Yoshinobu, and Abe, Minoru
- Subjects
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ELECTRIC power , *ELECTRIC utilities , *DATA transmission systems , *DIGITAL communications , *BROADBAND communication systems , *ELECTROMAGNETIC waves , *ELECTRIC lines - Abstract
As the frequency of operation of recent mobile communication devices has increased and their bandwidth has expanded, the behavior of electromagnetic waves inside the devices has attracted attention. In the microstrip lines used for these devices, T-junctions are used for branching in general. This structure is more likely to be affected by the transmission line orientation. In contrast, the asymmetric branch is less restrictive. On the other hand, the transmitted power is divided in an unbalanced way in high-frequency regions. In this paper, the unbalance of the transmitted power at the asymmetrical branch is quantitatively evaluated and a solution is discussed. It is found that a notch provided near the branch is effective. FDTD analysis reveals that the transmitted power unbalance of 16.2% at 10 GHz is reduced to 2.3% by means of a notch at the asymmetrical branch. Measurement confirms the effectiveness of our method. © 2005 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 88(5): 20–27, 2005; Published online in Wiley InterScience (
www.interscience.wiley.com ). DOI 10.1002/ecja.20164 [ABSTRACT FROM AUTHOR]- Published
- 2005
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