How to Configure MIMO antennae for MAX RANGE & Direction?

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mitchelldavidb48

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Sep 5, 2017
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How does one go about configuring the MIMO antenna array on one's WiFi DONGLE (BrosTrend™ AC1200 WiFi USB 3.0 Adapter Model: AC-3)
to achieve the tightest, highest data-rate beam pattern, oriented to a WAN Router (Netgear WNDR3700v3) approximately 10 meters away (L.O.S.),
indoors in an old-school ('50's) single-level, stick-framed apartment.

In other words...
How do I fold those rabbit ears around the internal fractal antenna and which way do I point that thing to target the base Router in the other room?
(BTW: sniffed & chose Channel 11 for 2.4GHz and Setup Defaulted to Ch.157 for 5GHz, My Preferred/Default Band.)

I KNOW such info abounds, but it seems to be evading me... so far,
and likely of interest to others with similar thoughts.

Thanks for any assistance.
DavidM7
 
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B
There are white papers on mimo but it is important to remember that the signals are not the same signal it is independent signals intentionally overlapped slightly out of phase. Its primary function is not to improve the range or direction but to increase the amount of data carried. It gets massively messy if you try to incorporate the signal strength which directly affects distance and how fast it runs at some given distance and try to say something has more range because it is faster at a certain distance.

Almost everything you will find regarding interference patterns looks a lab type of conditions or maybe outdoor installation. The reflections from walls and ceiling cause much more impact to the signals that the spacing...
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bill001g

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Aug 9, 2012
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Impossible to answer this wifi is affected by too much stuff when it is run in the real world. Many times the signal does not go through the wall it may bounce off and go around.

antenna on most routers and end equipment is designed to operate in a vertical orientation. All you can do is mess with it and see. It will likely be almost impossible to detect small differences because the signals are being affected by other peoples wifi signals interfering
 
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mitchelldavidb48

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Sep 5, 2017
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mitchelldavidb48

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Sep 5, 2017
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Thanks for your input, Bill.
However, I am hoping for more of a discussion regarding Antenna Theory in this application, so that I may apply Best Practices in my setup.
And, with a background in radar & nav systems, I understand environment can/will affect signal propagation.
Generally, operating environment is fixed and can only be optimized by adjusting Tx/Rx relative positions & orientation.
Beyond site issues, the relative orientation of the antennae elements constrain the shape the isotropic signal, focussing (if you will) Max Tx power & Rx Sensitivity into a tight, narrow envelope in a Single direction.
Hence the use of the terms, High-Power and Long-Range in these Wifi Routers which have the same Tx Power as omni-directional models.
So, any antenna gurus out there?

 
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bill001g

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Aug 9, 2012
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There are white papers on mimo but it is important to remember that the signals are not the same signal it is independent signals intentionally overlapped slightly out of phase. Its primary function is not to improve the range or direction but to increase the amount of data carried. It gets massively messy if you try to incorporate the signal strength which directly affects distance and how fast it runs at some given distance and try to say something has more range because it is faster at a certain distance.

Almost everything you will find regarding interference patterns looks a lab type of conditions or maybe outdoor installation. The reflections from walls and ceiling cause much more impact to the signals that the spacing between the antenna so it is impossible to even calculate things like this because of the all the variable involved in a real world install.

You can find massive amount of testing data on the fcc site where routes are tested against a fixed standard to ensure they meet regulations but that says little about how things perform in actual installations.

In almost all cases the router manufacture has already placed that antenna at the optimum spacing for the particular radio chipset and amplifiers they are using.
 
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