This is about how to use a transmitter / receiver component that uses a communication protocol, like this WiFly rn-xv, or this xbee pro, which doesn't come with a mounted antenna.  It does have a u.fl connector.

Here's how to interface this component with a proper antenna.

Step 1: What is a u.fl connector?

It is a mini coaxial cable connector designed for high radio frequencies up to 6GHz, which means that is has a wire conductor in the center, surrounded by an outer conductor, and an insulation between the two, called a dielectric layer.  Wifi, being 2.4 GHz transmission, often uses a u.fl connector as an adaptor wire for the antennas. 

You can see that the male connector is surface mounted on the pcb of the xbee and wifly rnxv. The female connector is on the end of the coaxial cable. 

<p>Wouldn't it have been better to include how one would go about afixing the female U.fl conn. to the cable? Does one solder the single internal wire? If so, is there some &quot;thing&quot; called a single thin leg solder tip, or perhaps a Spider Leg soldering iron? Yeah! for those especially tiny jobs. I do appreciate the very clear and concise instructions for putting the cable on the device. Interfacing. My Great,Great Grandson thinks that I should stop doing these things that I know I can't do, Well, that &quot;He&quot; knows I can't... Ya Da Ya Da.... I make him stand there and watch me shake, flutter and F*rt while I peer into a long thin battery lit portable microscope pretending that I can't see. Also, it has become mandatory to answer every question he has by politely saying &quot;What&quot;?, and drop the hot soldering iron in my lap just to get a reaction while he screams and jumps and makes a fuss with &quot;You're going to burn the house down!! I always thank him profusely and say &quot;Jimmy, Someday all this will be yours&quot;. At my age we call that, &quot;Living it up&quot;.</p>
<p>qonnor - Hello. I would have been interested in the female to coaxial cable connection method too as I want to make a cloverleaf aerial that uses this u.fl connection. Do you know where I can buy some of the female connectors. I found the SMD male connectors on Adafruit https://www.adafruit.com/products/1661 but no luck with the females Its the story of my life really :-) Thanks</p>

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