Method of Checking the Integrity of an Antenna Arrangement, Transmitter, Receiver and Transceiver

• US 20090280753A1
• Filed: 05/25/2007
• Published: 11/12/2009
• Est. Priority Date: 06/21/2006
• Status: Abandoned Application

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Philip, Melaine, Luong, Jean Luc, Merlin, Erich, Breitfuss, Klemens, Bergler, Heimo
• Application Number:
  US12/306,018
• Publication Number:
  US 20090280753A1
• Time in Patent Office: Days
• US Class Current: 455/77
• CPC Class Codes: G01R 31/52 Testing for short-circuits, leakage current or ground faults
• CPC Class Codes: G01R 31/54 Testing for continuity

Abstract

In a method of checking the integrity of an antenna arrangement (2) of a transmitter (1), which transmitter (1) comprises a transmitter driving stage (4) for driving the antenna arrangement (2) with a driving current (is), a first value (I_supply) indicative of the driving current (i_s) is determined. After that, it is detected whether the driving current (i) is outside a predefined current range by comparing the first value (I_supply) with a predefined first value range. If the first value (I_supply) is outside the first value range, then it is indicated that the antenna arrangement (2) is not in sound condition. The antenna arrangement (2) is comprised of an antenna (5) and a tuning network (6) connected between the antenna (5) and the transmitter driving stage (4).

Claims

1. A method of checking an integrity of an antenna arrangement of a transmitter, which transmitter comprises a transmitter driving stage for driving said antenna arrangement with a driving current;

said antenna arrangement being comprised of an antenna and a tuning network connected between said antenna and said transmitter driving stage;

the method comprising;

determining a first value indicative of said driving current;

detecting whether said driving current is outside a predefined current range by comparing said first value with a predefined first value range; and

indicating that said antenna arrangement is not in sound condition if said first value is outside said first value range.

2. The method of claim 1, further comprising,

determining a plurality of said first values indicative of a plurality of said driving currents, each related to an AC voltage of a plurality of AC voltages generated by said transmitter driving stage;

said AC voltages having different frequencies;

detecting whether each of said first values is within a respective predefined first value range of a plurality of first value ranges; and

indicating that said antenna arrangement is not in sound condition if any of said first values is outside its predefined first value range.

3. The method of claim 2, further comprising,

determining a plurality of impedance values by dividing each of said AC voltages by the corresponding driving current;

detecting whether said plurality of impedance values match a plurality of predefined impedance values; and

indicating that said antenna arrangement is not in sound condition if any of said plurality of impedances does not match said plurality of predefined impedance values.

4. The method of claim 2, wherein said tuning network is tuned to a tuning frequency and said different frequencies of said AC voltages are in a range between one tenth of said tuning frequency and twice said tuning frequency.

5. The method of claim 1, further comprising the steps of:

powering said transmitter driving stage with a supply current,

utilizing the electric current value of said supply current as said first value; and

comparing said electric current value of said supply current with a predefined supply current range for detecting whether said driving current is outside said predefined current range.

6. The method of claim 1, wherein said transmitter is a transceiver, further comprising a receiver stage;

the method further comprising,

determining a second value indicative of a voltage in said receiver stage at a predefined driving current;

detecting whether said voltage is outside a predefined voltage range by comparing said second value with a predefined second value range; and

indicating that said antenna arrangement is not in sound condition if said second value is outside said second value range.

7. The method of claim 6, further comprising.

determining a plurality of said second values indicative of a plurality of said voltages in said receiver stage, each voltage having a frequency of a plurality of predetermined frequencies and/or each voltage being associated with different values of said driving currents;

detecting whether each of said second values is within a respective predefined second value range of a plurality of second value ranges; and

indicating that said antenna arrangement is not in sound condition if any of said second values is outside its predefined second value range.

8. A method of checking an integrity of an antenna arrangement of a transceiver, which transceiver comprises a transmitter driving stage for driving said antenna arrangement with a driving current and a receiver stage;

said antenna arrangement being comprised of an antenna and a tuning network connected between said antenna and said transmitter driving stage;

the method comprising;

determining a value indicative of a voltage in said receiver stage at a predefined driving current;

detecting whether said voltage is outside a predefined voltage range by comparing said value with a predefined value range; and

indicating that said antenna arrangement is not in sound condition if said value is outside said value range.

9. The method of claim 8, further comprising,

determining a plurality of said values indicative of a plurality of said voltages in said receiver stage, each voltage having a frequency of a plurality of predetermined frequencies and/or each voltage being associated with different values of said driving currents;

detecting whether each of said values is within a respective predefined value range of a plurality of value ranges; and

indicating that said antenna arrangement is not in sound condition if any of said values is outside its predefined value range.

10. A method of checking the integrity of an antenna arrangement of a receiver, which receiver comprises an antenna arrangement being comprised of a tuning network and an antenna configured to capture a signal in response to an electromagnetic signal and a receiver stage for processing said signal captured by said antenna;

said tuning network being connected between said receive stage and said antenna, the method comprising;

determining a value indicative of a voltage of said tuning network at a predefined field strength of said electromagnetic field;

detecting whether said voltage is outside a predefined voltage range by comparing said value with a predefined value range; and

indicating that said antenna arrangement is not in sound condition if said value is outside said value range.

11. A transmitter, comprising:

an antenna arrangement being comprised of a tuning network and an antenna;

a transmitter driving stage for driving said antenna arrangement with a driving current;

said tuning network being connected between said transmitter driving stage and said antenna; and

a circuit for determining a first value indicative of said driving current;

said transmitter being configured to detect whether said driving current is outside a predefined current range by comparing said first value with a predefined first value range.

12. The transmitter of claim 11, wherein said circuit for determining said first value is configured to determine a plurality of said first values indicative of a plurality of said driving currents, each related to an AC voltage of a plurality of AC voltages generated by said transmitter driving stage;

said AC voltages having different frequencies; and

wherein said transmitter is configured to detect whether each of said first values is within a respective predefined first value range of a plurality of first value ranges.

13. The transmitter of claim 12, configured to determine a plurality of impedance values by dividing each of said AC voltages by the corresponding driving current;

and

configured to detect whether said plurality of impedance values match a plurality of predefined impedance values.

14. The transmitter of claim 12, wherein said tuning network is tuned to a tuning frequency and said different frequencies of said AC voltages are in a range between one tenth of said tuning frequency and twice said tuning frequency.

15. The transmitter of claim 11, comprising a power supply powering said transmission driving stage with a supply current;

the value of said supply current being utilized as said first value and said circuit for determining said first value indicative of said driving current being configured to mirror said supply current.

16. A transceiver, comprising:

a transmitter including an antenna arrangement being comprised of a tuning network and an antenna;

a transmitter driving stage for driving said antenna arrangement with a driving current;

said tuning network being connected between said transmitter driving stage and said antenna; and

a circuit for determining a first value indicative of said driving current;

said transmitter being configured to detect whether said driving current is outside a predefined current range by comparing said first value with a predefined first value range.

a receiver stage; and

a circuit for determining a second value indicative of a voltage in said receiver stage at a predefined driving current;

said transceiver being configured to detect whether said voltage is outside a predefined voltage range by comparing said second value with a predefined second value range.

17. The transceiver of claim 16, wherein said circuit for determining said second value is configured to determine a plurality of said second values indicative of a plurality of said voltages in said receiver circuit;

each voltage having a frequency of a plurality of predetermined frequencies and/or each voltage being associated with different of said driving currents

wherein said transceiver is configured to detect whether each of said second values is within a respective predefined second value range of a plurality of second value ranges.

18. A receiver, comprising:

an antenna arrangement being comprised of a tuning network and an antenna;

said antenna being configured to capture a signal in response to an electromagnetic signal;

a receiver circuit for processing said signal captured by said antenna;

said tuning network being connected between said receive circuit and said antenna; and

a circuit for determining a value indicative of a voltage of said tuning network;

said receiver being configured to detect, at a predefined field strength of said electromagnetic field, whether said voltage is outside a predefined voltage range by comparing said value with a predefined value range.

19. A transceiver, comprising:

an antenna arrangement being comprised of a tuning network and an antenna;

a transmitter driving stage for driving said antenna arrangement with a driving current;

said tuning network being connected between said transmitter driving stage and said antenna;

a receiver stage; and

a circuit for determining a value indicative of a voltage in said receiver stage at a predefined driving current;

said transceiver being configured to detect whether said voltage is outside a predefined voltage range by comparing said value with a predefined value range.

20. The transceiver of claim 19, wherein said circuit for determining said value is configured to determine a plurality of said values indicative of a plurality of said voltage in said receiver circuit;

each voltage having a frequency of a plurality of predetermined frequencies and/or each voltage being associated with different of said driving currents; and

wherein said transceiver is configured to detect whether each of said values is within a respective predefined value range of a plurality of value ranges.