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Last modified: Sun, 19 Mar 2017
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Aomway Patch ANT007B

Another patch from Aomway which seems at least as dubious as the ANT005. It's supposed to be circularly polarized, but the design seems to be 100% symmetrical, which is physically impossible. It shares many of the design flaws of the ANT005, so read my discussion about that one if you want to know the details.

It's a 2x2 array of linearly polarized patches, so I suspect that like the ANT005, this thing is actually linearly polarized.

VNA measurements

Image: photo-aomway-patch-ant007b.jpg

SMA version

Image: photo-aomway-patch-ant007b-rpsma.jpg

RP-SMA version

Image: vna-aomway-patch-ant007b.png

Matching actually looks fine on this one, but I have serious doubts about the radiation pattern.

Comments

Michiganbroadband

Comment #1: Fri, 30 Aug 2019, 18:33 (GMT+1, DST)

Quote

I'm curious about the total dropout below -30 on the one antenna.
Is that real?
And why would the other antenna not have a similar dropout?

Maarten Baert

Administrator

Comment #2: Wed, 11 Sep 2019, 11:20 (GMT+1, DST)

Quote

Quote: Michiganbroadband

I'm curious about the total dropout below -30 on the one antenna.
Is that real?
And why would the other antenna not have a similar dropout?

It is real but it's coincidental. Due to constructive and destructive interference it is possible that at some point, all reflections cancel each other out, and the total reflected signal will be almost zero. But since this is at -30dB we're talking about a difference of 0.1%, which is not significant. Basically it's noise, it will be different for every unit due to manufacturing tolerances.

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