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OBID

®

Antenna Manual

ID RW24

FEIG ELECTRONIC GmbH

Seite 9 von 15

h80391-1e-ID.doc

Inductance [

µ

H] for the corresponding number of turns

Surface A

[cm²]

18 turns

22 turns

26 turns

28 turns

36 turns

800

603

909

1000

700

1059

1200

790

1400

660

875

1600

720

955

1800

778

1032

2000

626

833

1105

2200

666

886

2400

704

937

2600

740

986

2800

776

1034

3000

811

1081

3200

844

1126

3400

619

877

3600

642

910

3800

664

941

4000

685

972

4200

706

1002

4400

727

1032

4600

747

1061

4800

767

1090

5000

787

1118

Chart 3.1-1

b

a

Figure 3.1-2

A = a

••

b

«
...
7
8
9
10
11
...
»

Summary of Contents for OBID ID RW24-A

Page 1: ...h80391 1e ID doc ID RW24 A Antenna Manual Version 1 1...

Page 2: ...ions become void The information contained in this manual has been compiled to the best of our knowledge FEIG ELECTRONIC GmbH does not guarantee for the correctness of the indications made in this man...

Page 3: ...enna 6 2 3 2 Flat strip cable antenna 6 2 3 3 Transmission antenna 6 2 3 4 Comparison 7 3 Elementary antennas 8 3 1 Simple frame antenna 8 3 2 8 loop used as frame antenna 10 4 Gate antennas 11 4 1 Ga...

Page 4: ...er used as data storage medium The system works with a carrier frequency of 125 kHz and uses amplitude modulation to transmit the data between reader and transponder As soon as the transponder gets in...

Page 5: ...ful since the multi meter generally performs direct current measurement The same applies to the equivalent circuit diagram inductance LESB This value too is increased by the parallel capacity CW Howev...

Page 6: ...frame After that the two ends of the cable are connected with each other in a staggered arrangement so that a conductor loop with the appropriate number of turns is created Connections are formed by t...

Page 7: ...and very difficult alignment we will not go into the particulars of this antenna type 2 3 4 Comparison Chart 2 3 4 1 comparison between the three methods of manufacture Manufacture Price Expenditure o...

Page 8: ...antenna type and is mostly used for access control of persons The size of this antenna depends highly on the requirements regarding reading range and on the surroundings Figure 3 1 1 In order to maxi...

Page 9: ...ns 26 turns 28 turns 36 turns 800 603 909 1000 700 1059 1200 790 1400 660 875 1600 720 955 1800 778 1032 2000 626 833 1105 2200 666 886 2400 704 937 2600 740 986 2800 776 1034 3000 811 1081 3200 844 1...

Page 10: ...and goods for which the position of the transponder can be fixed according to the field alignment of the antenna The range of such an antenna is rather low compared to a simple frame antenna which ma...

Page 11: ...recognition we recommmend to use transponder cards or transponders with an appropriately large coil In order to reach acceptable recognition rates the gate width for smaller transponders generally ha...

Page 12: ...te type as well is used mainly for personal identification The predominant direction of a transponder for safe recognition is vertical to the shield surface Figure 4 2 1 b If this marginal con dition...

Page 13: ...efore increases the probability that a transponder is recognized on one of the two sides a b Figure 4 3 1 One disadvantage of this arrangement is that due to the more diffuse field antenna sizes as us...

Page 14: ...to each other which means in a distance of only some meters a mutual influence is very likely We distinguish two kinds of influ ence by carrier frequencies by transmission logs 5 1 1 Mutual influence...

Page 15: ...rolled log run for both systems between antenna and transponder In this case we have two possible variants 1 Communication of only one system resp antenna with one transponder 2 Synchronization of the...

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