Inside? Kasens N5200 80dbi Wifi Antenna

[Hirnsausen]

Hi,

I see these Kasens 80dbi Wifi Antennas on Ebay and Amazon, but don't know, how they work. Does anyone know their internal design? Any photos, any sketches? Thanks.

Here's a link to the Ebay item, in order to get the idea what antenna I am inquiring about:
http://www.ebay.com/itm/Kasens-N5200-Wifi-Wireless-USB-Adapter-High-Power-6600MW-150Mbps-80dbi-Antenna-/162073861306?hash=item25bc5adcba:g:yHYAAOSwVcFXOvQf

 

[bill001g]

Find the FCCID and you will find all the photos of of the internal parts and test results.

I suspect it does not have one because the power level is not legal in just about any country. It is highly likely they lie about the power output and since there are no officially filled test results there is no way to tell. Stuff shipped directly from china is high risk of fraudulent claims.

It is extremely expensive to make micorwave amplifiers and antenna that can put out that much power so it is not likely they can sell it that cheap. Besides you are getting to the power level that can cause damage to you and other equipment. Remember a microwave oven runs on the same frequency band as wireless routers.

 

[Hirnsausen]

Hi, thanks for the answer. However, I don't know what the English abbreviation "FCCID" means. Can you explain? And once I know it, where would those FCCIDs be found? What is that website address?

China: yes, I fully agree with you. China is gangster domain, politically and economically. Much of what they send to western countries is fraudulent or dangerous. After all, we're only non-Chinese sitting at locations with valuable resources which are wanted by China. I like their ancient culture, but not their political imperialism and economical and ecological crime.

Antennas: they actually work exquisitely good. Surprisingly. I built so many antennas of large sizes by myself, but these things here are really getting around 80 dBi, I estimate. I placed them in a weather-protective lumber box just outside my kitchen window.

 

[bill001g]

FCC ID it is a number they obtained when they registered the product.

The antenna itself can not be getting 80db. A 30db gain antenna is over 3ft across. They would have to add the radio power to the antenna gain.

Re looking at the specs you linked the are being extremely deceptive. The 80db gain likely refers to the sensitivity and 80db is actually a little low and is only for running 802.11b. Sensitivity has nothing to do with output power. It also says it put out only 21db running 802.11n. This is actually low also. The legal maximum is 30db which is 1 watt.

The data in the chart would easily pass the power regulations, it is actually far below the maximum and is massively below the 6.6 watts they claim.

All this appears intentionally deceptive so I would avoid it.

If you want outdoor directional equipment look at engenius or uniquiti they are not that much more and these companies sell equipment that has fccid that you can get the independent test data so you really know what the output is and the company can not lie.

 

[Hirnsausen]

Thanks.

I still would love to know, how they're constructed inside. That would help me, to build (probably) similar antennas on my own. Simply, because it's performance is really very good, better than my largest other WiFi antennas. Even if it is only 30 dBi or so. I get networks over 1 km away, and many dozens of close-by networks.

 

[Polyna-Maude]

1st -> Microwave oven do operate in the 2.4Ghz ISM band but on a power rating of 500 - 1000W even more in some case and have a "leak" of around 1% so maybe 1 - 5 Watt of RF power get out of the box. That's why you may have some interferences when using the device and your WiFi.

2nd -> The max output power by FCC regulation (and EU / CA) is available on the following link : https://www.air802.com/fcc-rules-and-regulations.html
As you'll see the antenna will also make a difference in what is allowed.

3rd-> For sure this product is from China and has it's "rating" played around so to make it better than it is. But it's still a good product for the price.

4th-> As we're stuck in reality and held by the law of science. A USB device of "high power" may drain a maximum of 500mW of power from the bus and a "low power" one can get 100mW. As energy doesn't get created but only transformed (with loss) you won't get a higher output. Even with the FCC regulation,special rules apply to the wifi device used in computer. I'm not sure but you'll get at most 1W of power (20dBm). People buy chinese made card with RaLink 3070 chipset because it got good support and if you choose a good model you can easily "over"rate it by changing the data in Linux regulatory database to get more power.

 

[Polyna-Maude]

I have one at home. I"ll look how easy to open the device. And if I don't need to blow it open, I'll get you some picture. Some part you want more than other to see?