Dual-tapered microstrip-to-waveguide transition
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United States of America Patent
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Nov 3, 2015
Grant Date -
Sep 25, 2014
app pub date -
Apr 25, 2013
filing date -
Mar 22, 2013
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Abstract
An antenna apparatus comprises a substrate with a microstrip-to-waveguide transition comprising a microstrip feedline extending between a first terminal point and a second terminal point at a first metal layer and comprising a microstrip element and a probe element. The microstrip element includes a connection segment extending from the first terminal point to a second point, a taper segment extending from the second point to a third point, and a continuous-width segment extending from the third point to a fourth point. The probe element extends from the fourth point to the second terminal point and has a width which is narrower than the continuous-width segment. The substrate further includes a waveguide opening comprising a region surrounding the probe element and includes a plurality of metal vias disposed at the perimeter of the waveguide opening and which extend from the first metal layer to the second metal layer.
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