Open AccessCOMPACT DUAL-BAND 90° COUPLERS WITH CUSTOMIZABLE POWER DIVISION RATIOS UTILIZING SCRLH TRANSMISSION LINES
Author(s) -
JianQiang Gong,
Changhong Liang,
Bian Wu
Publication year - 2013
Publication title -
progress in electromagnetics research c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 34
ISSN - 1937-8718
DOI - 10.2528/pierc12110707
Subject(s) - division (mathematics) , multi band device , dual (grammatical number) , electric power transmission , electrical engineering , power (physics) , transmission (telecommunications) , power dividers and directional couplers , electronic engineering , materials science , computer science , engineering , physics , mathematics , art , arithmetic , quantum mechanics , antenna (radio) , literature
Novel dual-band 90◦ couplers with arbitrary power division ratios using simplified composite right-/left-handed (SCRLH) transmission lines (TLs) are proposed. With a degree of freedom in the structural parameters, a SCRLH stub can easily be tailored to imitate a conventional 90◦ section at two arbitrary frequencies with different characteristic impedances, making the resulting couplers with customizable power division ratios, as well as ensuring the size miniaturization and element realizability. To validate our idea, 90◦ couplers operated at 2.45/5.2 GHz with various power division ratios are designed and fabricated using microstrip technology. Good agreement is achieved between the simulated and measured results, justifying that the SCRLH configuration provides a new way of implementing compact dual-band 90◦ couplers with arbitrary power split ratios.
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