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International Journal of Microwave Science and Technology
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International Journal of Microwave Science and Technology
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2014
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Article
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Fig 1
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Research Article
Wideband Microstrip 90
°
Hybrid Coupler Using High Pass Network
Figure 1
Schematic diagrams of proposed 90° hybrid coupler with various schemes, where
,
, and
are the characteristic impedances of the quarter-wavelength transmission lines.