FXR.08.A

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|1.|Introduction|3|
|---|---|---|
|2.|Specifications|4|
|3.|Antenna Application|5|
|4.|Mechanical Drawing|8|
|5.|Packaging|9|
||Changelog|10|



Taoglas makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Taoglas reserves all rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without express permission is strictly prohibited. 

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## 1. Introduction 

The FXR.08.A is a rectangular, flexible, NFC (Near Field Communications) antenna for use in mobile devices and other applications. The design provides a flexible NFC antenna that can be adhered to the plastic enclosure of the device for ease of installation. 

With NFC antennas being commonly attached to the battery of mobile devices, they can be customized with a ferrite flux director to provide isolation from the battery or other components within the device. Using the antenna on a conductive surface without a ferrite layer will result in extremely short range or complete failure to communicate. 

Customized antennas for specific applications for shape and for impedance match can also be provided for an NRE and subject to MOQ. Contact your regional Taoglas sales office for more information and support on our NFC antenna range. 

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## **2.** Specifications 

**Electrical** ~~Cn~~ Frequency 13.56 MHz Self Resonance Frequency 40.85MHz Q Factor 163.4 Ls 4.22uH Rs 2.2Ω **Flexible NFC Mechanical** ~~Le~~ Dimensions: 53.34 mm x 37.3 mm Antenna Dimensions Thickness: 0.24 mm Adhesive 3M 467 Weight 581.6mg **Environmental** ~~Le~~ Operation Temperature -40°C to 85°C Storage Temperature -40°C to 85°C Humidity Non-condensing 65°C 95% RH 

Contact pads are gold plated copper. Base material is polyimide which can take heat from soldering for brief periods suitable for attaching wires. Additional wire length will affect read range and result in different performance than that detailed in this document. 

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## **3.** Antenna Application 

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3.1 Test Setup<br>**----- End of picture text -----**<br>


A test fixture is used to measure the maximum interrogation distance. The FXR.08.A antenna is connected to different NFC evaluation boards and then placed on the fixed part of the fixture. 

The test sample is placed on a thin sheet of plastic connected to the movable part of the fixture. Then the distance is carefully adjusted until the reader can no longer read the sample, thus the maximum interrogation distance is displayed in the ruler. 

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## **3.2** RFID Tags Used for Test 

A total of 10 RFID tags were used to measure the interrogation distances. The next picture shows type 1, type 2 and type 4 tags, respectively. 

Type 1 tag is based on ISO/IEC 14443A standard and has 512 bytes of memory. Type 2 tag is based on ISO/IEC 14443A standard and has 192 bytes of memory. Type 4 is based on ISO / IEC 14443A 1-4 compliant and has 2K of memory. 

The next picture shows the Tag-it HF-I RFID tags from Texas Instruments: RI-102-112, RI-I11-112, RI-I03-112, RI-I16-112, Button and RI-I17-112. 

The Tag-it HF-I Plus Transponder Inlay family of Texas Instruments RFID is based on the ISO/IEC 15693 standard for contactless integrated circuit cards (vicinity cards) and ISO/IEC 18000-3 standard for item management. 

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## **3.3** Matching |[4] 

The interrogation distances presented here were taken with the antenna connected directly to the evaluation boards with the default matching circuit. This is not necessarily the optimal matching circuit that could be designed for a particular antenna. We kept the default matching of each evaluation board to minimize the number of variables in testing and keep integration as simple as possible. 

## **3.4** Test Results |4 

A total of 11 sample devices were used to measure the interrogation distances. The results are in the next tables: 

- Using Texas Instruments TRF7970AEVM: 

|**Device**|**Dimensions (mm.)**|**Interrogation**<br>**Distance(mm.)**|
|---|---|---|
|Mifare Ultralight C|80 x 50|15|
|Topaz512 (Type 1)|43 x 43|28|
|NTAG203 (Type 2)|42|33|
|Mifare DESFire (Type 4)|80 x 50|--|
|Tag-it HFI Plus RI-I11-112|45 x 45|41|
|Tag-it HFI Plus RI-I02-112|76 x 48|60|
|Tag-it HFI Plus RI-I03-112|38 x 22.5|--|
|Tag-it HFI Plus RI-I16-112|24.2|30|
|Button type|22|29|
|Tag-it HFI Plus RI-I17-112|32.5|35|
|LG G2 cell phone|--|32|



- Using NXP MFEV700: 

|**Device**|**Dimensions (mm.)**|**Interrogation**<br>**Distance(mm.)**|
|---|---|---|
|Mifare Ultralight C|80 x 50|8|
|Mifare DESFire (Type 4)|80 x 50|17|
|LG G2 cell phone|--|24|



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## **4.** Mechanical Drawing 

**4.** 

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**5.** Packaging 

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Changelog for the datasheet<br>SPE-14-8-111 - FXR.08.A<br>Revision: E (Current Version)<br>Date: 2022-05-22<br>Changes: Updated specifications<br>Changes Made by: Cesar Sousa<br>Previous Revisions<br>Revision: D (Current Version)<br>Date: 2021-08-12<br>Changes: Full datasheet template updated & electrical data<br>added to spec table.<br>Changes Made by: Gary West<br>Revision: C<br>Date: 2015-04-30<br>Changes: Amended Impedance from nH to µH<br>Changes Made by: Aine Doyle<br>Revision: B<br>Date: 2015-05-02<br>Changes: Updated weight<br>Changes Made by: Aine Doyle<br>Revision: A (Original First Release)<br>Date: 2014-10-24<br>Notes:<br>Author:<br>**----- End of picture text -----**<br>


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