Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent English _ 2013-05-16 _ PDF 3.59 MB 5991-2061EN c20140811 [7]

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>> Download English _ 2013-05-16 _ PDF 3.59 MB 5991-2061EN c20140811 [7] documenatation <<

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Keysight Technologies
Low Frequency RFID Tag Characterization
Using the N9322C Basic Spectrum Analyzer (BSA)



                                        Application Note
Abstract                              About RFID Tags
The resonance frequency of a          Radio frequency ID (RFID) systems rely on RFID tags, which are small tran-
radio frequency identification        sponders (a combined radio receiver and transmitter) that transmit identity
(RFID) tag is a key factor that       information over a short distance when asked. Generally, an RFID tag contains
determines the effective radio        two parts. One is an integrated circuit for storing and processing information,
communication distance between        and modulating and de-modulating an RF signal. Another part is an antenna for
the tag and the reader. Measuring     receiving and transmitting signals to the reader (see Figure 1).
the resonance frequency of an
RFID tag is easy using the Keysight   The resonance frequency of the RFID tag is one of the key factors that impact
Technologies, Inc. N9322C basic       the effective communication distance between the reader and RFID tags. When
spectrum analyzer (BSA).              RFID tags are packaged, a non-contact coupling method can be used to measure
                                      their resonance frequencies, which corresponds to the negative peak of its
                                      return loss characteristic curve.

                                                              Antenna                    Loop antenna         IC



                                                                  Stimulus power

                                                                        Data



                                                                                                RFID

                                              Reader

                                      Figure 1. An overview of an RFID system




                                                         2
Measuring a 13.56 MHz Passive RFID Tag with
the N9322C Basic Spectrum Analyzer (BSA)
The N9322C is a multi-use RF analyzer that spans to spectrum analysis,
transmission measurement, and reflection measurement. By simply adding
the tracking generator (Option TG7) and the reflection measurement
application (Option RM7), the N9322C BSA is capable of measuring the
return loss of RFID tags:

 

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