Communication systems, communication apparatuses, radio frequency communication methods, methods of communicating using a radio frequency communication system, and methods of forming a radio frequency communication device
First Claim
1. A communication device comprising:
- 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.
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Accused Products
Abstract
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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Citations
63 Claims
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1. A communication device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31)
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12. A communication device comprising:
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a first antenna operable to receive wireless communication signals;
a second antenna having plural leads operable to output wireless communication signals, the second antenna being selectively configured between a first load impedance and a second load impedance lower than the first load impedance;
a switch electrically coupled with the second antenna, the switch being selectively operable to close to electrically short the leads and open to electrically insulate the leads; and
a transformer intermediate the switch and the second antenna, the transformer being configured to effect the second load impedance of the second antenna responsive to the switch being open.
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24. A communication system comprising:
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an interrogator; and
a communication device configured to communicate with the interrogator, the communication device including;
a first antenna operable to receive wireless communication signals from the interrogator;
a second antenna operable to output wireless communication signals to the interrogator; and
a connection configured to provide a low load impedance of the second antenna during receiving of wireless communication signals using the first antenna.
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32. A communication device comprising:
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a first antenna operable to receive wireless communication signals;
a second antenna operable to output wireless communication signals; and
a connection configured to provide a low load impedance of the second antenna during receiving of wireless communication signals using the first antenna. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. A radio frequency identification device comprising:
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a substrate;
a first antenna borne by the substrate, the first antenna being operable to receive wireless interrogation signals;
a second antenna borne by the substrate and having plural leads, the second antenna being operable to output wireless identification signals responsive to reception of wireless interrogation signals, the first antenna and the second antenna being separated by a distance approximately equal to the wavelength of the wireless interrogation and identification signals;
a transmission line connection including plural conductive lines having respective first ends and second ends, the transmission line connection having a length of approximately one quarter the wavelength of the wireless interrogation and identification signals and being coupled with the plural leads of the second antenna at the first ends of the conductive lines, the transmission line connection being further operable as a transformer to transform a high load impedance of the second antenna to a low load impedance; and
an integrated circuit including a microprocessor, transponder circuitry and a switch, the switch being coupled with the second ends of the conductive lines of the transmission line connection, the microprocessor operable to control the switch to provide shorting of the leads during receiving of the wireless interrogation signals and selective isolation of the leads during outputting of the wireless identification signals.
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40. A method of communicating comprising:
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forming a first antenna;
forming a second antenna;
receiving wireless interrogation signals using the first antenna;
opening a coupling intermediate plural leads of the second antenna during the receiving;
providing a low load impedance of the second antenna during the receiving;
outputting wireless identification signals using the second antenna; and
selectively shorting the leads of the second antenna during the outputting. - View Dependent Claims (41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 52, 53, 54)
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47. A method of communicating comprising:
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forming a first antenna;
receiving wireless communication signals using the first antenna;
forming a second antenna;
outputting wireless communication signals using the second antenna; and
beam forming during the receiving using the first antenna and the second antenna.
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55. A method of communicating comprising:
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providing a first antenna and a second antenna;
receiving wireless communication signals via the first antenna;
outputting wireless communication signals via the second antenna; and
providing a low load impedance of the second antenna during the receiving. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62)
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63. A method of communicating within a radio frequency identification device comprising:
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forming a forward link antenna upon a first surface of a substrate;
forming a return link antenna upon the first surface of the substrate;
receiving wireless communication signals via the forward link antenna;
outputting wireless communication signals via the return link antenna responsive to the receiving;
spacing the forward link antenna and the return link antenna a distance of approximately one wavelength of the received and outputted wireless communication signals;
switching the impedance of the return link antenna during the outputting using a switch coupled with plural leads of the return link antenna;
opening the switch during the receiving;
transforming the load impedance of the return link antenna during the receiving using a transmission line having a length of approximately one quarter the wavelength of the received and outputted wireless communication signals; and
beam forming using the forward link antenna and the return link antenna.
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Specification