发明授权
US07898389B2 Radio frequency identification (RFID) tags and methods of communicating between a radio frequency identification (RFID) tag and an interrogator 有权
射频识别(RFID)标签和射频识别(RFID)标签与询问器之间通信的方法

Radio frequency identification (RFID) tags and methods of communicating between a radio frequency identification (RFID) tag and an interrogator
摘要:
The present invention provides communication devices, communication systems and methods of communicating. According to one embodiment of the invention, a communication device includes: a first antenna operable to receive wireless communication signals; a second antenna having plural leads, the second antenna being operable to output wireless communication signals; a connection including plural conductive lines having respective first ends and second ends, the connection being coupled with the leads of the second antenna at the first ends of the lines; and a switch coupled with the second ends of the connection, the switch being operable to provide one of selective shorting and isolation of the leads. One method of communicating of the invention includes: forming a first antenna; forming a second antenna; receiving wireless interrogation signals using the first antenna; outputting wireless identification signals using the second antenna; opening a coupling intermediate plural leads of the second antenna during the receiving; selectively shorting the leads of the second antenna during the outputting; and providing a low load impedance of the second antenna during the receiving.
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