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SKYEMODULE M1

ANTENNA DESIGN GUIDE

VERSION 100112

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Содержание SKYEMODULE M1

Страница 1: ...SKYEMODULE M1 ANTENNA DESIGN GUIDE VERSION 100112...

Страница 2: ...112 This product or document is protected by copyright and distributed under licenses restricting its use copying distribution and decompilation No part of this product or document may be reproduced i...

Страница 3: ...20 328 3425 Fax 720 228 2400 TABLE OF CONTENTS 1 About this Document 6 1 1 Revision History 7 2 Overview 8 2 1 Internal Antenna 9 2 2 External Antenna 9 3 Custom Antennas 11 3 1 Design Procedure 11 3...

Страница 4: ...2400 LIST OF FIGURES Figure 1 1 Example Prototype Antenna 6 Figure 2 1 Antenna Connector 8 Figure 2 2 The SkyeRead EA1 External Antenna 9 Figure 2 3 The SkyeRead EA1 Circuit 10 Figure 3 1 Example Ant...

Страница 5: ...M1 Antenna Design Guide Page 5 Skyetek Inc 1525 Market St Ste 200 Denver CO 80202 www skyetek com Main 720 328 3425 Fax 720 228 2400 LIST OF TABLES Table 1 1 Revision History 7 Table 2 1 J2 Pin Descr...

Страница 6: ...external antenna to provide up to 10 inches of read range For applications that require more than 10 inches of read range a power amplifier can be used to drive an external antenna The SkyeModule M1...

Страница 7: ...age 7 Skyetek Inc 1525 Market St Ste 200 Denver CO 80202 www skyetek com Main 720 328 3425 Fax 720 228 2400 1 1 Revision History Revision Author Change 100112 Brad Alcorn Releasing new format with min...

Страница 8: ...with the SkyeTek M1 RFID reader module All antenna connections are made at the Antenna Connector J2 Figure 2 1 Antenna Connector J2 Pin Name Description 1 GND Antenna Ground 2 ANT Antenna Output pin A...

Страница 9: ...pproximately 10Vpp Note that typically the antenna drive signal at the ANT pin of J2 is generated when a host first sends a tag command to the M1 in which the RF_F is set see SkyeTek Protocol V2 Guide...

Страница 10: ...In the figure above inductor L1 is the physical antenna loop Zp forms a resonant circuit tuned at 13 56MHz so there is an amplification of the ANT signal at B You can measure and compare the amplitud...

Страница 11: ...aterials ANT has a typical output impedance of 50 ohm at 13 56MHz The external antenna should be matched to this 50 ohm output drive impedance The series capacitance Zs provides the matching adjustmen...

Страница 12: ...capacitor DigiKey p n SG1015 ND C2 100pF 0805 ceramic chip capacitor DigiKey p n PCC101CGCT ND C3 not present R4 is not present L1 1 05uH is the loop inductance of the 2 turn PCB antenna trace approxi...

Страница 13: ...C2 800pF dipped mica capacitor 470 330 C3 ___ R4 ___ While monitoring A and B with an oscilloscope you will see how this antenna is susceptible to detuning from mounting on metal and even from the pr...

Страница 14: ...et St Ste 200 Denver CO 80202 www skyetek com Main 720 328 3425 Fax 720 228 2400 Figure 3 2 Improved Antenna with Ground Shield X 170mm Y 30mm W 10mm C1 220pF dipped in mica capacitor C4 ___ C2 1810pF...

Страница 15: ...ww skyetek com Main 720 328 3425 Fax 720 228 2400 The following pictures are examples of how to build a prototype antenna If you will mount the antenna on metal then you should design the antenna on m...

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