Antennas from China!

[chilanzar2 85]

Here we discuss the antennas "made in China". From other countries, too, is allowed. We spread our photos of antennas, write about our impressions.

[chilanzar2 85]

 

 

[chilanzar2 85]

Came the antenna Yagi. Written by freg: 1710-2170. SWR 1.4 only at a frequency of 1800 MHz. SWR 1.9 to fr2100. Amplification - I do not know. I think it's bad. Written on the antenna 13DBi 

Edited April 21, 2017 by chilanzar2

[Admin 2546]

what?this?

or this...??

[chilanzar2 85]

[Admin 2546]

Ok, Erkin, I will resume simulating this antenna for you

[Admin 2546]

Is not the good antenna

,,,with directors...

,,,without directors..

[chilanzar2 85]

 

But, patches are not square on the simulator. They should be square

[Admin 2546]

All patches are square, as seen in the picture...!!!

[Admin 2546]

See how it works....

ERKIN3.dxf

 

[chilanzar2 85]

Aa .., all the time thought that you were wrong on these ports. I wanted to fix it ... but, you beat me

[chilanzar2 85]

Admin, and you saw it?

[Admin 2546]

Maybe you're right...!!!

[chilanzar2 85]

Today received such an OMNI. It looks good. Handsomely. Inside the protective cap piece of wrapping paper - I think so - just paper. I did not have time to check it. In addition, I only have a swr-meter. The cable is not mechanically fastened. My opinion, the cable rests on the soldering of its central core. He does not hold on to anything else. I will test this device. This omni cost me $ 20

[Admin 2546]

I would be interested in adapting the impedance, you put some dimensions if you can,..!!!

Inside,corrugated cardboard , helps concentrate the electromagnetic wave as a dielectric lens,I think...!!!!

[chilanzar2 85]

 

Impedance?! My Anritsu S331d can not check the impedance. Or I do not know how to check. This device cost me a free. But me it's free. Today I worked long and hard at my job. Did not have time to check this OMNI. If I fail to measure the impedance on my anthrite, then I will ask you to make this an engineer in our communication institute. They have Rudy-Schwartz

[chilanzar2 85]

 

Jomy, impedance and vswr - different parameters?

We do not know how to test impedance. In the laboratory, the Ministry of Communications said that if low vswr, then the impedance would also be normal. Do not know how to test impedance. This laboratory has an anechoic chamber. Such at us "experts".This omni antenna only for 1700-2600 showed a low vswr of -1.3. Very high vswr at 850-960 - 2.

[Admin 2546]

For a good antenna VSWR should be <1.2

[pragata.my.id 25]

both written 20dbi, which is correct?
 

https://ko.aliexpress.com/item/WIFI-antenna-power-signal-enhancement-20DB-stacked-high-gain-directional-2-4GHz-shipping-shuangling/32481141397.html

https://ko.aliexpress.com/item/New-2-4G-20dBi-out-door-Planar-antenna-DIY-antenan-1m-cable/32571865744.html

[Admin 2546]

"No one, both of them are chinese lies...!!!!