METHOD AND CIRCUIT FOR PROVIDING RF ISOLATION OF A POWER SOURCE AND AN RF DEVICE EMPLOYING SUCH A CIRCUIT
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United States of America Patent
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Issued Date -
Jul 24, 2008
app pub date -
Oct 16, 2007
filing date -
Oct 17, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A radio frequency (RF) device includes electronic circuitry having a radio frequency section and power connectors for electrically connecting the electronic circuitry to at least one power source for providing the device with power. At least one quarter wavelength transmission line is connected between the power connectors and the electronic circuitry and acts as a low-to-high impedance transformer at RF, while at low frequencies i.e. DC, it provides a physical connection. Thus, the transmission line section has substantially no effect on the DC connection between the power source and the device.
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