Adding Antennas to Ciseco Radios

 

 

1. Overview

2. Possible Antenna's

3. Ciseco Products

4. Soldering a U.FL

5. Disconnecting the chip antenna

 

1 Overview

 

 

2 Possible Antenna's

Possible Antenna selection
Left to Rigth, Wire whip, U.FL, U.FL to SMA Pigtal, End launch SMA


U.FL Connector Bottom: note the gold middle connetion this should the the one soldered to the middle pad on the footprint.


U.FL Connector Top


Antenna lengths for wire a wire whip
433 1/4 wave = 164.7mm
868 1/4 wave = 82.2mm
915 1/4 wave = 77.9mm

 

 

 

3 Ciseco Products


R001 - XRF v1.5: End launch SMA, Note the top left leg has been cut short


R001 - XRF v2: End launch SMA



R001 - XRF v2: U.FL


R002 - URF: Wire whip


R003 - ERF: Wire whip


R004 - SRF & R005 - SRF-U: Removing the Chip ant(for best results remove the inductor first then snap off), External Antenna connetion(pin 8)


B008 - XinoRF: Wire whip hole


B009 - Explorer Plus: U.FL


B009 - Explorer Plus: Wire whip


R010 - SRF-Stick: Wire whip


R011 - ARF: End Launch SMA top


R011 - ARF: End Launch SMA bottom


R011 - ARF
: Wire whip


R012 - RFµ-328: Wire whip


R013 - RFµ-328-Bare:
with RFM12B and wire whip


R016 - Slice of Radio: U.FL


R016 - Slice of Radio
: Wire whip

 

 

4. Soldering a U.FL

 

The XRF v2 and a few other product have the U.FL pads pre tinned with solder (lead free) and some have bare pads.
For pre tinned device you can use the following method for attaching a U.FL connector.
Using tweezers hold the U.FL in on place with a very slight down pressure.
Heat one of the long side pads till the solder reflows. You can move it around a little with the tweezers while the one pad it hot to get the alignment right.
With one pad sodlered the U.FL will stay in place and you can reflow each of the other pads to finish.

If you have un-tinned pads, tin just one of the long pads first. You only need a small amount of solder not a huge mountian. Using tweezers hold the U.FL in on place with a very slight down pressure.
Heat the long side pads till the solder reflows. You can move it around a little with the tweezers while the one pad it hot to get the alignment right.
With one pad sodlered the U.FL will stay in place and you can solder each of the other pads to finish. Again you will not need huge amounts of sodler just enough to flow between the pad and the connector
 

 

5. Disconnecting the chip antenna

 

For an SRF with build in antenna remove parts directly below the antenna as highlighted below


For a device with a no antenna SRF remove the two matching parts on the main PCB as highlighted below