Method and circuit for providing rf isolation of a power source and an rf device employing such a circuit
AssigneePowerID Ltd.
InventorsZvi NITZAN, Doron LAVEE, Benyamin ALMOG
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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.
Claims23
A radio frequency (RF) device comprising:
- electronic circuitry including a radio frequency section;
- power connectors for electrically connecting the electronic circuitry to at least one power source for providing the device with power;
- and
- at least one quarter wavelength transmission line connected at a first end thereof to the power connectors and connected at a second end thereof to the electronic circuitry.
A radio frequency (RF) device comprising:
- a substrate supporting electronic circuitry comprising a radio frequency section;
- a battery for providing the device with power;
- and
- at least one quarter wavelength transmission line connected at a first end thereof to the battery and connected at a second end thereof to the electronic circuitry.
A method of RF isolating a power source in an RF device and wherein the RF device comprises electronic circuitry comprising a radio frequency section;
- the power source being electrically coupled to the electronic circuitry, the method comprising:
- connecting the power source to the electronic circuitry via at least one quarter wavelength transmission line.
Dependencies are inferred from the claim text.