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boy
Joined: 30 Sep 2002
Posts: 563
Helped: 39
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 26 Nov 2003 2:23 2.92 3.5 sma connector 2.4 |
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can i connect 3.5 mm to sma without using an adapter? my frequency is about 6 GHz. are all of them machanically the same? someone told me before that 3.5 mm and SMA are machanically the same. I am not sure about 2.4 mm can i use SMA connect directly to 2.4 mm conector?
tajnk you
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Needbias
Joined: 03 Mar 2002
Posts: 164
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26 Nov 2003 8:08 difference between a k connector and an sma |
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| the inner conductor diameter of 3.5mm&SMA is not the same,but you can use one to instead of other if you do not have a adapter,it has little effect on using it.But you can not connect a SMA to a 2.4mm conector,that will produce nothing.
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flyhigh
Joined: 12 Nov 2003
Posts: 561
Helped: 32
Location: somewhere over the rainbow
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26 Nov 2003 10:36 2.4mm to 3.5mm sma |
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Yes, you can connect SMA to 3.5 mm, it will not be a problem concernig electric characteristics at the frequencies of interest. Just be careful about the mechanical arangement as tolerance for 3.5mm are very tight, it is professional type, while dimensions of SMA can vary more as they are for mass consumer use, so it is not rare case that mail SMA damages femail 3.5mm connector if to much force is applied. Don't use torque wrench, use bare hands only!
flyhigh
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26 Nov 2003 10:36 Ads |
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Debeli
Joined: 29 Aug 2003
Posts: 69
Helped: 2
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26 Nov 2003 14:50 3.5 vs sma |
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I have used 3.5 mm connectors to mate to SMA without problems at frequencies up to 18 GHz. 2.4 mm is NOT mechanically compatible with either of the two so mating it to SMA can damage the connectors.
Here is a document that gives excellent cover at connector topics. It can be found at the web, but at the moment I don't have the time to search it again.
Regards
D.
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flyhigh
Joined: 12 Nov 2003
Posts: 561
Helped: 32
Location: somewhere over the rainbow
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26 Nov 2003 15:49 3.5 sma connector |
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By the way, can someone explain the basic difference between 3.5mm and K type connectors? I know that thay are 100% compatible, just don't know is it just different manufacturer or something substantially different?
flyhigh
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Debeli
Joined: 29 Aug 2003
Posts: 69
Helped: 2
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26 Nov 2003 16:42 3.5mm sma 2.4mm |
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K connectors are also known as 2.92 mm and have been introduced by Anritsu for application to 40 GHz. It is mechanically different from 3.5 mm as it is described in the document I have uploaded.
HP has later replaced it with 2.4 mm connectors, but latest applications are going for 1.8 mm connectors. Latest two are fully compatible.
D.
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flatulent
Joined: 19 Jul 2002
Posts: 4875
Helped: 324
Location: Middle Earth
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26 Nov 2003 17:24 2.4mm sma connector |
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| The connector guide above comes from http://www.npl.co.uk/electromagnetic/rfmgw/tech-transfer/anamet/publications.html which has many other useful downloads on connectors.
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edaforum
Joined: 08 Dec 2006
Posts: 1
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08 Dec 2006 17:01 adapter 3.5 to sma connector |
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This link was broken, does anyone have an updated link?
| flatulent wrote: |
| The connector guide above comes from h**p://www.npl.co.uk/electromagnetic/rfmgw/tech-transfer/anamet/publications.html which has many other useful downloads on connectors. |
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UKnowWhat
Joined: 20 Jan 2005
Posts: 42
Helped: 4
Location: People Republic of California
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21 Dec 2006 23:51 can i connect a 3.5mm to an sma |
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| edaforum wrote: |
This link was broken, does anyone have an updated link?
| flatulent wrote: |
| The connector guide above comes from h**p://www.npl.co.uk/electromagnetic/rfmgw/tech-transfer/anamet/publications.html which has many other useful downloads on connectors. |
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h**p://www.npl.co.uk/electromagnetic/clubs/anamet/publications.html
or contact them to get free publications
h**p://www.npl.co.uk/electromagnetic/publications/
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marcomdd
Joined: 11 Jan 2003
Posts: 159
Helped: 3
Location: Rome
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24 Dec 2006 9:05 3.5mm sma adapter |
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| flyhigh wrote: |
By the way, can someone explain the basic difference between 3.5mm and K type connectors? I know that thay are 100% compatible, just don't know is it just different manufacturer or something substantially different?
flyhigh |
3.5 mm connector and K connector are mechanical but not electrical compatible (read mismatches).
In the first one the inner diameter of the external conductor is 3.5mm and it is used up to 26 GHz (but the cut off frequency is higher); the inner conductor of the external diameter of the second one is 2.92 mm: it is used up to 40 GHz and the cutoff frequency is 46 GHz.
happy holidays
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UKnowWhat
Joined: 20 Jan 2005
Posts: 42
Helped: 4
Location: People Republic of California
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25 Dec 2006 21:39 sma and 3.5 same |
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the link below is very helpful about 3.5mm and SMA cross family connection, especially about the section that you can damage the 3.5 cal kit if you rotate the connector while tightening (very easy to do that).
h**p://www.microwaves101.com/encyclopedia/connectorsprecision.cfm#35mm
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