Omni Outdoor Antenna High Gain Fiberglass Full Wave 915MHz 6dBi RP-SMA (LoRa AU915 & AS923) (CE05943)

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High Gain Omni Antenna specifically design for LoRa Gateway applications and a zero compromise setup.

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Isn’t the wavelength of 915 MHz 328mm?

I’m not sure how 400mm is half-wave?

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Hi Peter,

Between the bracket, fittings and some elbow room, the total height is 400mm

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Hi @Graham,
Do you have any extension cables for the 50ohm coax? I need a cable about 10m long to go between this antenna and my Laird Sentrius Gateway.

Thanks
Jon

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Is it possible to replace the RG58 cable with something like the LMR-400?

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Hi Graham.
Your blurb does say height without bracket 840mm.
While we are here how is 90cm shorter than 840mm???
Cheers Bob

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Hi Peter. Yes, it is 328mm (without end effect adjustment)

It is for about 375MHz.

In all fairness it may be called a full wavelength vertical but we don’t know what goes on inside that fibreglass tube. To get a gain of almost 6db there are probably several 1/2 wave centre fed dipoles connected as a co-linear array. 4 would probably do it and would account for the 840mm length.
Cheers Bob

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Thanks Rob, we’ll check out what went wrong with that description write-up!

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Hey everyone,

The description on the product page has just been updated (you may need to clear your browsers cachet o show the update), I’ve double-checked the 90cm antenna we have in-house to make sure all the specs are okay and confirmed they are, so the 840mm antenna page has just had a slight edit made!

Thanks for notifying us Bob :smile:

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10

2 thoughts here:

  • Won’t the signal get lost in the 5meter cable?
  • I imagine a xiao won’t be able to power this thing. what is recommended as a Meshcore repeater that has enough juice to make use of this?
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Hey there, @Pixmusix,

While there would be some cable loss, it’s not enough to “lose” the signal entirely. The supplied 5 m lead is specified as 50 Ω RF100 low-loss coax rather than RG58. Any loss is offset by the benefits of reaching a clear, high point.

The antenna is also passive, so the XIAO wouldn’t be powering it. The If you’re using a low-power MeshCore repeater, like the XIAO nRF52840 and Wio-SX1262 kit, then the attached LoRa radio on the SX, and an SX1262 can provide up more than enough signal strength (up to 22 dBm).

You just need to ensure that the SMA cable has the correct polarity for the antenna. SMAs vs RP-SMAs confuse a lot of people.

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Hi Jane

I know what you mean, centre contact male or female, There are lots of people who may not.

I think “polarity” could be change to “sex” as Murphy’s law says that there will be lots of people associate this with Voltage polarity and wonder where the battery is. That would really be a can of worms.
Cheers Bob