What is Reddit's opinion of Alfa APA-M25 Dual Band 2.4GHz/5GHz 10dBi high gain Directional Indoor Panel Antenna with RP-SMA Connector (Compare to Asus WL-ANT-157)?

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Yes, this should work fine. I use one that is even smaller than this one and as long as I position it correctly I get great signal strength.

Or you could try a directional antenna like this one:

https://www.amazon.co.uk/Alfa-APA-M25-directional-connector-WL-ANT-157/dp/B00R1PA9EO&sa=U&ved=2ahUKEwjH-oTI3P3tAhXIi1wKHWBUCdgQFjACegQIBhAB&usg=AOvVaw1777UgVLQQTv5mcJqt5-8S

Although it is probably overkill for your needs.

u/Rubik842 is right, even if he is being a little vague. It probably won't help much, if at all. RF at WiFi frequencies is very vulnerable to the skin effect. The wire you are using is probably causing a lot of loss, or at the very least, low SNR. Even though your speeds are significantly higher, your latency is probably off the charts due to all the packets it would be dropping. The only time you wouldn't be dropping packets is if you are incredibly lucky, as even the slightest defect in that cable will cause multipath distortion and at least a little bit of noise.

All of this is completely disregarding the problem with your reflector. There is a very low chance that it is efficient at 0.12491352416m (for 2.4GHz, around 12.49cm) or 0.0599584916m (for 5GHz, around 5.99cm) If I were you, I would go buy a pre-built directional antenna, as they are designed with all this in mind. They are pretty cheap if you know what you are looking for.

It is still pretty intuitive for a temporary solution, though.

This one will work well with 5GHz: https://www.amazon.com/ALFA-APA-M25-directional-connector-WL-ANT-157/dp/B00R1PA9EO

This one will work well with 2.4GHz: https://www.amazon.com/TP-Link-Outdoor-Directional-connector-TL-ANT2414A/dp/B003CFATNS?th=1

Beware of no-name omnidirectional antennae, as they aren't well made. Most of them make things worse.

Info for those who don't work with radio: Those numbers above represent the ideal length for your antenna. They are pretty easy to calculate. The formula is λ = C/f, which means wavelength = speed of light / frequency in Hz.

To get wavelength from GHz:

299792458 / (GHz * 1000000000)

For MHz:

299792458 / (MHz * 1000000)

For KHz:

299792458 / (KHz * 1000)

For Hz:

299792458 / Hz

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The result will be in meters for all of the above.

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Your antenna can be full-wave, which means its length matches the wavelength.

You can also get a half-wave antenna, which has a very small degradation in performance. Its length is half of the wavelength that you are using.

Quarter-wave antennas are also available, but they carry a more significant performance decrease. You can probably guess how long it needs to be based on the pattern so far.

Anything smaller probably isn't worth it, as a full-wave antenna for 2.4GHz is just under 5 inches long in the first place. A quarter wave antenna is just over an inch. Full-wave 5GHz antennas are already tiny. They are around 2.4 inches long, with quarter-wave being barely longer than half an inch.

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To be totally honest u/dusty_whale, if you are happy with it's functionality, I wouldn't bother buying one. There is a chance, albeit a rather small one, that your DIY reflector fulfilled all of those requirements I listed above. Nice job, it looks really cool regardless.

Edit: Easier to read number formatting for the wavelengths.

Une antenne wifi directionnelle, tout simplement ?

Sinon la boîte de Ricoré si tu es un peu bricoleur.

theres a couple options depending on the distance, it sounds like the houses are relatively close? about 50 feet is my estimate?

if you have a router with removable antennas you can replace 1 or two with directional antennas like these it could get you just enough to barely cover the entire house but its the cheapest option

there are more expensive and powerful antennas designed to cover a large outdoor area might just cover the whole house like this

spending a little more would be a point to point wireless system and from there you can put in access points (not routers) assuming you want the same wifi name and everything

more involved will be running a fiberoptic line from one house to the other.

i dont believe mesh systems would work since you can barely get signal in the other house i doubt it would work unless you hard wired the node

Dude I had a similar setup, but my wifi connection was shit, I upgraded with these.

Alfa APA-M25 Dual Band... https://www.amazon.com/dp/B00R1PA9EO?ref=ppx_pop_mob_ap_share

TRENDnet Magnetic Dual Antenna... https://www.amazon.com/dp/B098863C6C?ref=ppx_pop_mob_ap_share

Went from 30Mbs to 400Mbs

I have the same problem but with an even bigger plot of land. I got myself 2 Netgear R7000 routers that have 3 antenna's on the back. I replaced the antenna's with an Alfa Network directional antenna:

https://www.amazon.com/Alfa-APA-M25-directional-connector-WL-ANT-157/dp/B00R1PA9EO

I found out about because this absolute WiFi antenna freak figured out it is actually one of the best extenders:

https://www.youtube.com/watch?v=pIPMwQ4Bsuw

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All 6 antennas point in the direction I want to cover and they work amazingly.

If you need more info, let me know.

I got myself an Alfa APA-M25 from amazon for $15 ( https://www.amazon.nl/Alfa-APA-M25/dp/B00R1PA9EO/ref=asc_df_B00R1PA9EO/?tag=nlshogostdde-21&linkCode=df0&hvadid=430556406142&hvpos=&hvnetw=g&hvrand=17632919126866098815&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9065228&hvtargid=pla-459420522617&psc=1 )

I pointed it in the direction of my top floor and now I have 5 bar wifi where I used to have none. This was for me the cheapest most effective way to get my whole house covered.

I actually bought a second one to point it into my garden. Works as advertised.

Thanks, the example requires a Coaxial cable, not being too proficient with the types of connectors, I'm not sure how to get from ethernet to coax, unless this connects to the router antenna connection? The router I have does have replaceable antennas, so could replace with this: https://www.amazon.co.uk/Alfa-APA-M25-directional-connector-WL-ANT-157/dp/B00R1PA9EO/ref=sr_1_5?dchild=1&keywords=directional+antenna+wifi&qid=1608542715&sr=8-5

Well theres a few point to look at here:

1: That distance is a bit of a stretch regardless but there are some pretty good PCIe and USB based cards that should handle it okay assuming your walls aren't made of brick. The one you posted i believe should be up to task but give it as much of a fighting chance as possible by maybe using a USB extender and placing it out from behind your system.

2: Unfortunately on-board wifi isn't the highest quality from really any of the manufacturers. Some boards that have actual antenna ports tend to get a little bit better reception but its not uncommon for even people buying higher end $400+ motherboards to either use a hardline ethernet connection or add in a PCIe wifi card as even high end boards can have less than ideal wifi.

3: If your router has antennae that can be removed then you could try replacing one of them with a highly directional patch antenna and point it in the direction of your room. Theres a few of them on Amazon that work pretty well like this one: https://www.amazon.com/Alfa-APA-M25-directional-connector-WL-ANT-157/dp/B00R1PA9EO/ref=sr_1_1?dchild=1&keywords=router+patch+antenna&qid=1590003827&sr=8-1

Source: Been building PCs for about 12 years now.

I've found the ring doorcam to be very touchy about wifi signal strength. I was able to resolve these issues and double my signal by using a "Directional" Dual band antenna on my router.

https://www.amazon.com/ALFA-APA-M25-directional-connector-WL-ANT-157/dp/B00R1PA9EO/ref=sr_1_4?ie=UTF8&qid=1547589658&sr=8-4&keywords=alfa+dual+band+antenna

So if you have a wired connection I don't have any solutions for you. If you are wireless I do.

First is to see if you have a 5g network and an adapter that can actually connect to that. I do and I wasn't because my adapter couldn't. The issue is if you have a lot of walls between you and the router that the 5g is actually worse for that so that part didn't help.

Second is to make sure your router isn't in an area surrounded with a lot of things that can block it. This includes physically.

Third (and between this and the second part it solved my lag issue in dungeons and raids) but a directional antenna for your adapter. It has a much better connection than a regular antenna which is enough for most people. Here is the link to the one I found.

https://www.amazon.com/gp/product/B00R1PA9EO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Now a good way I was using to compare my success outside of just playing was to run this link (http://portableapps.com/apps/utilities/winmtr_portable) and ping one of the wow servers closest to me found on (https://us.battle.net/support/en/article/7648) Then let it run for about 60-90 seconds and see how bad my worst ping is. If it shoots up really high then you probably need to keep adjusting the aim on your directional antenna/ buy a better adapter/ move the location of your router/ buy a better router.

RCmodelreviews has lots of really good videos on this, go through his channel and take a look.

https://www.youtube.com/watch?v=Bx7gMUw1MGw

You are going to be limited by the transmitters power, usually measured in mW or milli-watts. You wont get much distance gain from a whip antenna off of an internet router because it has a low dB gain. More gain means more transmitting power, but a much more narrow transmission band.

To increase the range you could try a patch antenna, which could potentially double your range, the trade off is that you would need to be pointing the antenna at your quad-copter at all times.