W3580

## Ferrite-backed Embedded NFC Antenna 

## @Pulse **/** © LARSEN 

_Pulse Part Number W3580_ 

The W3580 is a flexible Near Field Communication (NFC) antenna ideal for tight-space embedded products such as tablets, laptops, and payment terminal devices.  It is intended for secure payment applications where connect distances are highly constricted to keep sensitive information safe. 

The W3580 has a semi-flexible sintered ferrite backing designed to optimize magnetic fields, thus increasing the corresponding field strength of the antenna.  Mounting the antenna is easily accomplished using the thin but aggressive holding adhesive backing.  Recommended for mounting on the inside of battery covers, or locations where the antenna will be on or in close proximity to ground planes or displays. 

## **Features** 

- Excellent performances on metal surfaces 

- Thin, semi-flexible structure 

- Easily assembles to device covers or mechanics 

- Excellent for tap-n-pay applications 

- Well-known antenna concept, reliable technology 

- RoHS Compliant Product 

## **Applications** 

- Mobile devices 

- Payment terminals 

- Sharing / pairing 

Electrical Specifications 

## Environmental Specifications 

|Operating Temperature [°C]<br>-40 to +85<br>Mechanical Specifications<br>Color<br>Grey<br>Dimensions [in/mm]<br>1.38 x 1.97 x 0.018<br>(35 x 50 x 0.45)<br>Frequency [MHz]*<br>13.56<br>Reading Distance [mm]*<br>20 EMVCo<br>15 Card (avg)<br>Impedance [Ω]*<br>50 / 80<br>Self Resonance Frequency [MHz]**<br>58<br>Inductance [µH]**<br>0.95<br>Resistance [Ω]**<br>3.9<br>Q-Factor**<br>20<br>Matched Q Value***<br>5-15<br>**NOTE**:  Electrical characteristics depend on distance from metal objects and the location of the antenna on the device.<br>~~=§~~|Operating Temperature [°C]<br>-40 to +85<br>Mechanical Specifications<br>Color<br>Grey<br>Dimensions [in/mm]<br>1.38 x 1.97 x 0.018<br>(35 x 50 x 0.45)<br>Frequency [MHz]*<br>13.56<br>Reading Distance [mm]*<br>20 EMVCo<br>15 Card (avg)<br>Impedance [Ω]*<br>50 / 80<br>Self Resonance Frequency [MHz]**<br>58<br>Inductance [µH]**<br>0.95<br>Resistance [Ω]**<br>3.9<br>Q-Factor**<br>20<br>Matched Q Value***<br>5-15<br>**NOTE**:  Electrical characteristics depend on distance from metal objects and the location of the antenna on the device.<br>~~=§~~|Operating Temperature [°C]<br>-40 to +85<br>Mechanical Specifications<br>Color<br>Grey<br>Dimensions [in/mm]<br>1.38 x 1.97 x 0.018<br>(35 x 50 x 0.45)<br>Frequency [MHz]*<br>13.56<br>Reading Distance [mm]*<br>20 EMVCo<br>15 Card (avg)<br>Impedance [Ω]*<br>50 / 80<br>Self Resonance Frequency [MHz]**<br>58<br>Inductance [µH]**<br>0.95<br>Resistance [Ω]**<br>3.9<br>Q-Factor**<br>20<br>Matched Q Value***<br>5-15<br>**NOTE**:  Electrical characteristics depend on distance from metal objects and the location of the antenna on the device.<br>~~=§~~|Operating Temperature [°C]<br>-40 to +85<br>Mechanical Specifications<br>Color<br>Grey<br>Dimensions [in/mm]<br>1.38 x 1.97 x 0.018<br>(35 x 50 x 0.45)<br>Frequency [MHz]*<br>13.56<br>Reading Distance [mm]*<br>20 EMVCo<br>15 Card (avg)<br>Impedance [Ω]*<br>50 / 80<br>Self Resonance Frequency [MHz]**<br>58<br>Inductance [µH]**<br>0.95<br>Resistance [Ω]**<br>3.9<br>Q-Factor**<br>20<br>Matched Q Value***<br>5-15<br>**NOTE**:  Electrical characteristics depend on distance from metal objects and the location of the antenna on the device.<br>~~=§~~|
|---|---|---|---|
|Measured in free space||||



- With matching network 

- ** Bare coil without any matching network 

- *** With matching network (adjustable). Typical network picture refer to page 2. 

San Diego, CA  858 674 8100 Vancouver, WA 360 944 7551 Europe 49 7032 7806 0 Asia 86 755 33966678 North Asia 886 3 4356768 China 86 512 6807 9998 

L151.A (01/13) 

pulseelectronics.com/products/antennas 

1 

## Ferrite-backed Embedded NFC Antenna 

_Pulse Part Number W3580_ 

NOTE: Terminal Dimensions 5.75 x 2 mm 

~~**Recommended matching network**~~ **Component Value Note** Lemc 560 nH Filter resonance at 15.4 MHz Cemc 180 pF Filter resonance at 15.4 MHz C1 51 pF Antenna matching component, value depends on the antenna environment Antenna matching C2 198 pF Antenna matching component, value depends on the antenna environment Antenna matching Rq 0 Ohm Rq resistors used to lower Q-value Input EMC Filter Matching Q-factor Output to Antenna 

For More Information 

**Pulse Worldwide Headquarters Larsen Brand Antennas Europe Headquarters Asia Headquarters Pulse North Asia** 12220 World Trade Drive 3611 NE 112th Avenue Pulse GmbH & Do, KG B402, Shenzhen Academy of 3F, No. 198, Zhongyuan Road San Diego, CA 92128 Vancouver, WA 98682 Zeppelinstrasse 15 Aerospace Technology Bldg. Zhongli City, Taoyuan County 320 U.S.A. USA Herrenberg 10th Kejinan Road, High-Tech Zone Taiwan R. O. C. Germany Nanshan District, Shenzen, PR China 518057 Tel: 858 674 8100 Tel: 360 944 7551 Tel: 49 7032 7806 0 Tel: 86 755 33966678 Tel: 886 3 4356768 Fax: 858 674 8262 Fax: 369 944 7556 Fax: 49 7032 7806 135 Fax: 86 755 33966700 Fax: 886 3 4356823 

## **Pulse (Suzhou) Wireless Products Co, Inc.** 

99 Huo Ju Road, (#29 Bldg, 4th Phase) Suzhou New District Science & Tech Industrial Park Jiangsu Province, Suzhou 215009 PR China 

Tel: 86 512 6807 9998 Fax: 86 512 6809 8023 

Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. © Copyright, 2010. Pulse Electronics, Inc. All rights reserved. **2 pulseelectronics.com/products/antennas** L151.A (01/13) J 1S @ Pulse