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Farah Haddad
(@fhaddad)
Eminent Member
Joined: 4 months ago
Posts: 27
2020-03-25 9:56 pm  

HI All, I am trying to do another project and I am not able to order the right cable. I can't understand the connections so I am going to post the photos for them because I am confused. I hope someone can tell me which cable to order based on the photos below. The antenna I have has a threaded female connection body and female inner pin connection, the connector on the PCB has a male inner pin and a male connection body but not threaded. Please see photos below. I can't get my head around ordering the right cable connection between them!

PCB
ANtenna

 


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Farah Haddad
(@fhaddad)
Eminent Member
Joined: 4 months ago
Posts: 27
2020-03-27 6:47 am  

No one knows ?


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SysGuru
(@sysguru)
Active Member
Joined: 4 months ago
Posts: 14
2020-03-27 7:16 am  

These are commonly referred to as "RP-SMA" RF connections. 

You might have to make your own cable, if so, try searching for:

Female RP-SMA.

Male RP-SMA Threaded

 

Something like this:

https://www.digikey.hk/product-detail/en/rosenberger/32RS147-302L5/1868-1222-ND/7926923

 

Having said that, I have bought small RF adaptor cables with SMA/RP-SMA connections in the past, if I remember where I got them, I will post again.


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NewburyPi
(@dale)
Estimable Member
Joined: 11 months ago
Posts: 101
2020-03-27 7:26 pm  

Farah

A closer look at the picture of the male connector, makes this a little more difficult. you'll see in the image below that the similar connector (Female RP-SMA) has threads on the outside of the connector. yours does not seem to have any threads. Inside or out. Could you send another picture, showing the side view of the connector? I've not seen this type of connector (thread-less) before. Speculation would have it that your connector is incomplete or mal-formed.

RP SMA

 

--
Dale


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SysGuru
(@sysguru)
Active Member
Joined: 4 months ago
Posts: 14
2020-03-31 3:58 am  

Threadless SMA connectors do exist.  They a referred to as "Quick Connect" or "Push-on" connectors and typically used for testing.

 

@fhaddad is it possible to use a more widely available connector on the PCB side?


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SysGuru
(@sysguru)
Active Member
Joined: 4 months ago
Posts: 14
2020-03-31 4:31 am  

Example quick connect RP-SMA:

https://www.data-alliance.net/rp-sma-quick-connect-male-to-female-adapter-qma-slide-on-for-testing/

But still may not be the right part.


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NewburyPi
(@dale)
Estimable Member
Joined: 11 months ago
Posts: 101
2020-03-31 12:51 pm  

Thanks @sysguru,

Just goes to show, there's always something to be learned. It's one of the reasons I'm in the forum 👍

 

--
Dale


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Farah Haddad
(@fhaddad)
Eminent Member
Joined: 4 months ago
Posts: 27
2020-04-02 5:19 pm  

Hi All,

Thanks for your support. Let me update you on what happened with me perhaps you can help here. 

From the Antenna side, I had to solve the issue by buying an adaptor that has mail threading on one end and female on the other and has the pin on both ends. The cable that I bought also is here and you can see both ends

IMG 2817
IMG 2823

on the PCB side, I still have a problem. The cable I ordered does not fit the connectors I bought. The first connector that I bought is the one I posted the photo for above and here is the side of it

IMG 2815

 

The second connector that I thought it will work also didn't work, here's the photo

IMG 2816

 


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Farah Haddad
(@fhaddad)
Eminent Member
Joined: 4 months ago
Posts: 27
2020-04-02 5:22 pm  

@sysguru

Yes please, just let me know what cable and what PCB connector I should use or are famous and widely used 


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SysGuru
(@sysguru)
Active Member
Joined: 4 months ago
Posts: 14
2020-04-03 3:05 am  

@fhaddad Most of devices I purchased use Female SMA, which should work with the adaptor you have and cables should be easy to find.

image

 

Otherwise, you could use a Female RP-SMA connector, then plug the antenna directly in.

image

 

Apologies for the badly focused photos from my phone.


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