PIN diode network for multiband RF coupling
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United States of America Patent
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Dec 29, 2009
Issued Date -
N/A
app pub date -
Apr 28, 2006
filing date -
Apr 28, 2006
priority date (Note) -
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Abstract
A PIN diode network includes a parallel inductor. In the off state of the PIN diode, the inductor forms a resonant tank circuit in parallel with the PIN diode. The inductor is selected based on the stray capacitance of the PIN diode so that the self resonant frequency (SRF) of the tank circuit is at or near the desired operating frequency. At the operating frequency, the impedance of the tank circuit is essentially infinite. At the operating frequency, isolation is improved for the PIN diode network as compared to a PIN diode alone. The PIN diode network allows a lower specification PIN diode to operate with higher isolation. The PIN diode network allows a lower specification PIN diode to operate at a higher frequency than would otherwise be possible due to intrinsic stray capacitance of the PIN diode.
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