Arduino Day - suggestion: DIN housing with LAN, CAN and LoRa

RE: Arduino Day - suggestion: DIN housing with LAN, CAN and LoRa

Jan Cumps — Tue, 22 Feb 2022 10:57:17 GMT

member, Comment on this comment, if you see this in your notifications, or on the e14 homepage Blog feed.
(test for a feedback request I raised)

RE: Arduino Day - suggestion: DIN housing with LAN, CAN and LoRa

jc2048 — Mon, 21 Feb 2022 19:04:58 GMT

If that's a DIN rail box and your DIN rail is horizontal (usually the case), then the arrangement you show also places the antenna horizontal. Problem with that is that there are then going to be partial nulls in the response along the plane of the antenna. (The antenna is basically a dipole, though there's a bit of zig-zagging and the ends folded round, which will modify the radiation pattern a little.) You might consider having the antenna vertical (both ends of the link - remember that the radio waves are polarised, so both ends need to match). If you get it vertical, it will be much more of an omnidirectional pattern and you'll be throwing the energy out parallel to the ground (which is usually where you want the energy to go). The obvious exception to that might be if you had the devices one above another on the floors of a building where there then would be an argument for directing energy up and down.

This document shows their test results.

https://www.molex.com/pdm_docs/as/AS-105262-0001-001.pdf

See section 4.5 for the 2d patterns. I might be wrong, but they may have X and Y swapped on the XY plot (but that doesn't negate the general point I'm making above). Perhaps someone with a better knowledge of RF stuff than me might comment.

RE: Arduino Day - suggestion: DIN housing with LAN, CAN and LoRa

Jan Cumps — Mon, 21 Feb 2022 17:20:16 GMT

TEST COMMENT #2 for a blog of 30 March 2021

RE: Arduino Day - suggestion: DIN housing with LAN, CAN and LoRa

Jan Cumps — Mon, 21 Feb 2022 17:14:34 GMT

Test a post to a blog of myself, from March 30 2021

RE: Arduino Day - suggestion: DIN housing with LAN, CAN and LoRa

Jan Cumps — Fri, 18 Feb 2022 18:39:54 GMT

In the above photos, I put the sun-1 GHz antenna on the transparent front to make the photo interesting.
As you can see, I had just put some tape on the back and taped it to the front panel from the backside.

Now I'm working on a real design*, I'm doing it different.
Use the self-adhesive properties of the antenna: the MOLEX 105262 that I'm using has a 3M adhesive backside.
Mount it out of sight: the transparent front will be used for status LEDs and a display.

This will position the antenna horizontal (flat parallel to earth). If you get better reception by placing it vertically, you can glue it on the other side of the corner I taped it to. It fits there too.