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Antennas Updates

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pdxlocations 2023-07-19 15:50:05 -07:00
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2
docs/hardware/antennas/antenna-report.mdx
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@ -7,6 +7,6 @@ sidebar_position: 2
## RicInNewMexico
[_RicInNewMexico_](https://github.com/RicInNewMexico) has gone through the trouble of testing a number of commonly purchased antennas in the Meshtastic community and given an opinion on whether or not a given antenna is performing optimally.
[_RicInNewMexico_](https://github.com/RicInNewMexico) and others have gone through the trouble of testing a number of commonly purchased antennas in the Meshtastic community and given an opinion on whether or not a given antenna is performing optimally.
Please check out the project on Github: [Meshtastic-Antenna-Reports](https://github.com/RicInNewMexico/Meshtastic-Antenna-Reports)

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docs/hardware/antennas/lora-antennas.mdx
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@ -17,7 +17,7 @@ The antenna's design will affect:
- Amount of signal which is reflected back to the device itself
:::caution
While the LoRa devices we use for Meshtastic are relatively low power radios, care should be taken _not_ to operate any radio transmission device without an antenna or with a poorly matched antenna. Un-transmitted radio signal reflected back to the transmitter can damage the device.
While the LoRa devices we use for Meshtastic are relatively low power radios, care should be taken _not_ to operate any radio transmission device without an antenna or with a poorly matched antenna. Radio signals transmitted without an antenna can reflect back and damage the device.
:::
<object data="https://www.youtube.com/embed/V3f-Y3EfsBU?autohide=1&autoplay=0" width="100%" height="400"></object>

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docs/hardware/antennas/testing.mdx
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@ -27,7 +27,7 @@ Some understanding of the factors affecting radio communications will help achie
The Meshtastic devices (of various flavors) lend themselves to experimentation, not only because you can replace their aerials, but also because of their mesh operation. All nodes will, without alteration, relay communications from any other members of the mesh around obstacles and over greater distances. The cost of aerial investment should be weighed against investment in additional low-cost nodes.
:::caution
While the LoRa devices we are using for Meshtastic are relatively low power radios, care should be taken _not_ to operate any radio transmission device without an aerial or with a poorly matched aerial. Un-transmitted radio signal reflected back to the transmitter can damage the device.
While the LoRa devices we are using for Meshtastic are relatively low power radios, care should be taken _not_ to operate any radio transmission device without an aerial or with a poorly matched aerial. Radio signals transmitted without an antenna can reflect back and damage the device.
:::
The information collected here is by no means definitive, and necessarily abbreviated (it's a huge topic).
@ -72,7 +72,7 @@ Unless you're using your devices in a vacuum, with clear line of sight between a
- Absorption by materials (with varying degrees attenuation, by material and depth),
- Reflection off surfaces (and channeling through material tunnels, including warm / cold air tunnels commonly present in the atmosphere),
- Diffraction around obstacles (over forests and around corners).
- [Fresnel Zone](They may not have been selected for your given frequency range, tuned or of a quality design.) - Football shape between antennas that must be clear of obstructions or else the signal is attenuated.
- Fresnel Zone - A football shape between antennas that must be clear of obstructions or else the signal is attenuated.
### Environmental Factors