Antenna for a read/write unit for radio frequency identification (RFID) arrangements, and read/write unit for operation with an external antenna
First Claim
1. An antenna for a read/write unit for radio frequency identification arrangements, the antenna being configured to connect to an external antenna connection of the read/write unit via an antenna line, the antenna comprising:
- a data memory having at least one of type information and property information, a content of the data memory being readable by the read/write unit;
a directional coupler integrated into the antenna and operatively coupled to the data memory;
a measuring device integrated into the antenna, said measuring unit determining at least one value of a field strength or power of a radio-frequency signal that is fed into the antenna by the read/write unit, said radio-frequency signal being decoupled by the directional coupler; and
means for informing the read/write unit about the at least one value being reached or exceeded.
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Accused Products
Abstract
An antenna, a read/write unit, an radio frequency identification (RFID) arrangement and a method, wherein the antenna is configured to connect to an external antenna connection of the read/write unit via an antenna line, wherein the antenna includes a data memory having type information and/or having property information, the content of the data memory being readable by the read/write unit, and includes a measuring device for determining a value of the field strength or power of a radio frequency signal fed into the antenna by the read/write unit, and includes a device for informing the read/write unit about the value being reached or exceeded.
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Citations
17 Claims
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1. An antenna for a read/write unit for radio frequency identification arrangements, the antenna being configured to connect to an external antenna connection of the read/write unit via an antenna line, the antenna comprising:
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a data memory having at least one of type information and property information, a content of the data memory being readable by the read/write unit; a directional coupler integrated into the antenna and operatively coupled to the data memory; a measuring device integrated into the antenna, said measuring unit determining at least one value of a field strength or power of a radio-frequency signal that is fed into the antenna by the read/write unit, said radio-frequency signal being decoupled by the directional coupler; and means for informing the read/write unit about the at least one value being reached or exceeded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A read/write unit for radio frequency identification arrangements, the read/write unit being configured to at least one of adjust a transmission power and determine a maximum transmission power based on a type or properties of an antenna including a measuring device integrated into the antenna and based on a damping of an antenna line operatively coupled to a directional coupler integrated into the antenna;
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wherein the read/write unit is configured to read a piece of type or property information from the antenna and to automatically take account of the damping by receiving a piece of information about at least one value for a field strength or power of a radio-frequency signal received in the antenna including the measuring device and the directional coupler from the read/write unit being reached or exceeded and to relate the at least one value to a relative or absolute value for the radio-frequency signal output by the read/write unit, said radio-frequency signal being decoupled by the directional coupler; and wherein the read/write unit is configured to ascertain one of a maximum transmission power and a transmission power that is to be used from the type or property information and from a relationship between the power of the output radio-frequency signal and the information about the at least one value.
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15. A system comprising:
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a read/write unit for radio frequency identification arrangements, the read/write unit being configured to at least one of adjust a transmission power and determine a maximum transmission power based on a type or properties of an antenna and based on a damping of an antenna line; and an external antenna connected via a connecting line, the external antenna being configured to connect to an external antenna connection of the read/write unit via the antenna line, the external antenna comprising; a data memory having at least one of type information and property information, a content of the data memory being readable by the read/write unit; a directional coupler integrated into the antenna and operatively coupled to the data memory; a measuring device integrated into the external antenna, said measuring device determining at least one value of a field strength or power of a radio-frequency signal that is fed into the antenna by the read/write unit, said radio-frequency signal being decoupled by the directional coupler; and means for informing the read/write unit about the at least one value being reached or exceeded; wherein the system is configured to automatically match the read/write unit to the external antenna and the antenna line; wherein the read/write unit is configured to read a piece of type or property information from the external antenna and to automatically take account of the damping by receiving a piece of information about at least one value for a field strength or power of a radio-frequency signal received in the external antenna from the read/write unit being reached or exceeded and to relate the at least one value to a relative or absolute value for the radio-frequency signal output by the read/write unit; and wherein the read/write unit is configured to ascertain one of a maximum transmission power and a transmission power that is to be used from the type or property information and from a relationship between the power of the output radio-frequency signal and the information about the at least one value.
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16. A method for matching a read/write unit for radio frequency identification arrangements to an external antenna that is connected via a connecting line, the method comprising:
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reading, by the read/write unit, at least one of a piece of type information and property information from the external antenna; outputting, by the read/write unit, at least one radio-frequency signal and feeding the at least one radio-frequency signal into the external antenna, said radio-frequency signal being decoupled by a directional coupler; transmitting by the external antenna a piece of information about at least one value of the radio-frequency signal captured in the external antenna being reached or exceeded to the read/write unit, a measuring device and the directional coupler being integrated into the external antenna; and utilizing, by the read/write unit, at least one of the piece of type information and the property information from the external antenna and utilizing a relationship between a relative or absolute output power and the at least one value to perform an adjustment to achieve maximum transmission power.
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17. An antenna for a read/write unit for radio frequency identification arrangements, the antenna being configured to connect to an external antenna connection of the read/write unit via an antenna line, the antenna comprising:
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a data memory having at least one of type information and property information, a content of the data memory being readable by the read/write unit; a directional coupler integrated into the antenna and operatively coupled to the data memory; a measuring device integrated into the antenna, said measuring unit determining at least one value of a field strength or power of a radio-frequency signal that is fed into the antenna by the read/write unit, said radio-frequency signal being decoupled by the directional coupler; and means for informing the read/write unit about the at least one value being reached or exceeded; wherein the antenna is configured to transmit the content of the data memory via clocked shorting of the antenna line to allow bit-by-bit transmission of the information that is to be transmitted.
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Specification