Balun and method for manufacturing the same
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United States of America Patent
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Aug 2, 2022
Grant Date -
Sep 9, 2021
app pub date -
Jul 8, 2018
filing date -
Jul 18, 2018
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Abstract
A balun and a method for manufacturing the same are disclosed. According to an embodiment, the balun comprises a substrate, and a first and a second coplanar waveguide (CPW) couplers which are disposed on the substrate and cascaded with each other. Each CPW coupler comprises two first ground planes disposed on a first side of the substrate, a first microstrip line and at least two second microstrip lines which are disposed on the first side of the substrate between the two first ground planes, and at least one third microstrip line that is disposed on an opposite side of the substrate. The first microstrip line and the at least two second microstrip lines can be coupled with each other by electromagnetic coupling. The at least one third microstrip line electrically connects the at least two second microstrip lines with each other by via-holes.
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