# How to change u.FL to chip antenna?
**URL:** https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877
**Category:** Hardware
**Created:** [December 20, 2013, 11:12pm UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877 "2013-12-20T23:12:36Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@kai](https://community.particle.io/u/kai)
#### Post date: [December 20, 2013, 11:12pm UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/1 "2013-12-20T23:12:36Z")
I didn’t realize I’d ordered the u.FL core, so I can’t really set things up. What components do I need to rebuild the spark core with chip antenna? Can someone give me a description how to do it?
Thank you, Kai
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### Author:  [@mohit](https://community.particle.io/u/mohit)
#### Post date: [December 21, 2013, 12:07am UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/2 "2013-12-21T00:07:51Z")
The easiest way is to buy a small external u.FL antenna.
In order to modify the Core to use a chip antenna, you would need to desolder the uFL connector and solder in:
0.8pF capacitor (C4)
3.3nH inductor (L1)
AT8010 chip antenna (ANT1)
Refer to the design files for more details: [https://github.com/spark/core](https://github.com/spark/core)
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### Author:  [@zach](https://community.particle.io/u/zach)
#### Post date: [December 21, 2013, 12:20am UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/3 "2013-12-21T00:20:53Z")
You can also purchase a u.FL antenna, like this:
> **[Recommendations for a cheap u.FL antenna](https://community.particle.io/t/recommendations-for-a-cheap-u-fl-antenna/840)**
>
> I didn’t realize I’d ordered the u.FL core, so I can’t really set things up until I get the antenna. I’ve been looking around for a cheap one and suggestions. I did find this from SparkFun - https://www.sparkfun.com/products/11320
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### Author:  [@richard](https://community.particle.io/u/richard)
#### Post date: [December 22, 2013, 4:18pm UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/4 "2013-12-22T16:18:46Z")
Thanks for the link [https://www.sparkfun.com/products/11320](https://www.sparkfun.com/products/11320)
The cable is kind-of long. Any idea if I can cut it shorter?
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### Author:  [@avidan](https://community.particle.io/u/avidan)
#### Post date: [December 23, 2013, 2:08am UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/5 "2013-12-23T02:08:49Z")
…and if you have amazon prime, you can get one before christmas (cuz we ALL know that we are gonna be playing with our spark cores this holiday!)
> **[Amazon.com: Mini PCIe Wifi Antenna Kit 3Dbi RP-SMA Antenna + 20cm U.fl/IPEX to...](https://www.amazon.com/Mini-Antenna-RP-SMA-Bulkhead-Pigtail/dp/B007XVHQ9M/ref=pd_cp_pc_0)**
>
> Amazon.com: Mini PCIe Wifi Antenna Kit 3Dbi RP-SMA Antenna + 20cm U.fl/IPEX to Bulkhead RP-SMA Pigtail: Computers & Accessories
i bought the double kit, and one of the antennas internal threading was junked up ☹
> **[Amazon.com: Dual Wi-fi Antenna Kit 5Dbi RP-SMA Antennas and 20cm/8" U.fl/IPEX...](https://www.amazon.com/Antenna-RP-SMA-Antennas-Hirose-Cables/dp/B00A4I3AGE/ref=sr_1_3?ie=UTF8&qid=1387764408&sr=8-3&keywords=u.fl%2Bantenna)**
>
> Our 5Dbi antenna and IPEX kits are ideal for combo wifi and bluetooth Mini PCIe cards that require both antennas forhe Bluetooth to work like the Intel Centrino Wireless N series cards.
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### Author:  [@ryotsuke](https://community.particle.io/u/ryotsuke)
#### Post date: [February 12, 2014, 7:46pm UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/6 "2014-02-12T19:46:54Z")
What is exact AT8010 part no?
AT8010-E2R9HAA? it is equal to Johanson p/n: 2500AT44M0400
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### Author:  [@BDub](https://community.particle.io/u/BDub)
#### Post date: [February 12, 2014, 8:42pm UTC](https://community.particle.io/t/how-to-change-u-fl-to-chip-antenna/877/7 "2014-02-12T20:42:34Z")
Plenty of these ( 2500AT44M0400 ) in stock at Digikey:
[http://www.digikey.com/product-detail/en/2500AT44M0400E/712-1403-1-ND/1840081](http://www.digikey.com/product-detail/en/2500AT44M0400E/712-1403-1-ND/1840081)
or Mouser:
[http://www.mouser.com/search/ProductDetail.aspx?qs=yCnrNFeXz%2biudLqSjJJ8lg%3D%3D&utm\_source=findchips&utm\_medium=aggregator&utm\_campaign=609-2500AT44M0400E&utm\_term=2500AT44M0400](http://www.mouser.com/search/ProductDetail.aspx?qs=yCnrNFeXz%252biudLqSjJJ8lg%3d%3d&utm_source=findchips&utm_medium=aggregator&utm_campaign=609-2500AT44M0400E&utm_term=2500AT44M0400)
ACX part number AT8010-E2R9HAA and it’s equivalent to Johanson p/n: 2500AT44M0400