Method and system for chopped antenna impedance measurements with an RFID radio
AssigneeSymbol Technologies, Inc.
InventorsMark Duron, Sean Connolly, Martin Strzelczyk
Life of this patent
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Abstract
Described herein are methods, devices and systems for characterizing an attached antenna to an electronic device, such as a radio frequency identification (“RFID”) reader. One exemplary embodiment is related to a method comprising outputting a low amplitude modulation (“AM”) index radio frequency (“RF”) waveform, the waveform simulating tag data timing and bandwidth, removing a direct current (“DC”) component from the waveform to create a chopped portion of the waveform, applying at least one vector analyzer technique on the chopped portion of the waveform, characterizing at least one antenna impedance vector of the waveform.
Claims24
A method, comprising:
- outputting a low amplitude modulation (“AM”) index radio frequency (“RF”) waveform, the waveform simulating tag data timing and bandwidth;
- removing a direct current (“DC”) component from the waveform to create a chopped portion of the waveform;
- applying at least one vector analyzer technique on the chopped portion of the waveform;
- characterizing at least one antenna impedance vector of the waveform.
A communication device, comprising:
- a radio frequency (“RF”) source outputting a low amplitude modulation (“AM”) modulation index radio frequency (“RF”) waveform, the waveform simulating tag data timing and bandwidth;
- a plurality of direct current (“DC”) blocks removing a DC component from the waveform to create a chopped portion of the waveform;
- a processor applying at least one vector analyzer technique on the chopped portion of the waveform and characterizing at least one antenna impedance vector of the waveform.
A system, comprising:
- a transmitting means for transmitting a low amplitude modulation (“AM”) modulation index radio frequency (“RF”) waveform, the waveform simulating tag data;
- a means for removing a direct current (“DC”) component from the waveform to create a chopped portion of the waveform;
- an analyzing means for applying at least one vector analyzer technique on the chopped portion of the waveform;
- and
- a characterizing means for characterizing antenna at least one impedance vector of the waveform.
Dependencies are inferred from the claim text.