Method And Circuit For Providing RF Isolation Of A Power Source From An Antenna And An RFID Device Employing Such A Circuit
First Claim
Patent Images
1. An RFID device comprising:
- (a) electronic circuitry suitable for an RFID device comprising a radio frequency section;
(b) an antenna;
(c) a battery which provides the device with power; and
(d) at least one quarter wavelength transmission line coupled between the battery and one or both of the electronic circuitry and the antenna.
1 Assignment
0 Petitions
Accused Products
Abstract
An RFID device including:
- electronic circuitry suitable for an RFID device comprising a radio frequency section;
- an antenna;
- a battery which provides the device with power; and
- at least one quarter wavelength transmission line coupled between the battery and one or both of the electronic circuitry and the antenna.
-
Citations
31 Claims
-
1. An RFID device comprising:
-
(a) electronic circuitry suitable for an RFID device comprising a radio frequency section; (b) an antenna; (c) a battery which provides the device with power; and (d) at least one quarter wavelength transmission line coupled between the battery and one or both of the electronic circuitry and the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
- 28. A method of RF isolating a power source in an RFID device, comprising connecting a power source to one or both of electronic circuitry and an antenna via at least one quarter wavelength transmission line.
-
31. A method of RFID device design, comprising:
-
(a) providing an RFID circuit without separable RF isolation elements; and (b) selecting a battery having an internal resistance high enough to avoid degradation of more than 4 dB in a circuit using the battery.
-
Specification