Circular and Linear Polarization LNB
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United States of America Patent
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Issued Date -
Jan 24, 2008
app pub date -
Jul 21, 2006
filing date -
Jul 21, 2006
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Abandoned
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Abstract
An LNB for simultaneous reception of circular and linear polarization radio frequency signals, having a circular waveguide coupled to a waveguide to microstrip turnstile transition. The microstrip outputs coupled to a multi-layer printed circuit board having symmetrical signal paths on separate layers. Each symmetrical signal path including a first combiner coupled to a low noise amplifier that is coupled to a splitter. A first output of each of the splitters having a linear polarization and a second output of each of the splitters coupled to a branch line combiner having two outputs, each of the two outputs having opposite hands of circular polarization.
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