SMA connector type is different between 868/915 variants

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1

Hello,

I recently changed from a 868MHz to a 915MHz gateway.
The 868 variant had a SMA Female connector, where as the 915 variant has a SMA Male connector. Is this by design? if so, why?

Thanks,
-S.

2

Are you sure it is a SMA Male connector? An SMA RP Female is more likely.

RP SMA is required in the USA to comply with FCC regulations.

3

Thanks :slight_smile:

4

Hi j4zzcat

This is Arie From TTN Modiin

  1. You have two types of sma connectors sma and sma-rp.one has a pin in the female connector one does not. It is not related to frequency.I have a converters sma to sma-rp .

From aliexpress
https://www.aliexpress.com/item/18-Pcs-SMA-Kits-Connector-Male-Female-Plug-Antenna-Converter-Adapter-Coax-Set/32832358695.html?spm=a2g0s.9042311.0.0.43d44c4dmbwlL1

I have put forward a frequency plan for Israel isr915-917. 300k separation from 915.1 to 916.9

If you need a adapter contact me

5

I think the SMA and SMA-RP was some fcc rule to stop you from putting a large antenna on wifi 2.4mhz

But both are now widely used I have a RAK831 it came with a Antenna it was the wrong type for N1201SA (Vector Impedance Analyzer) so I checked the antenna with a SMA adapter VSWR is 1.2 at 950mhz and vswr 2.2 at 915mhz if I trust the N1201SA

I have been offered samples on a 915mhz from a local supplier as well as a 915mhz chip antenna.
I may just build one using the N1201SA to tune to 915mhz.