Posts Tagged ‘2.4ghz’

Stacking 4 ATMOS Antennas

Sunday, October 21st, 2007

Interesting post in zero wireless forum about stacking four atmos antennas.

The result looks very bizarre really :

here is the link :

http://www.zero13wireless.net/foro/showpost.php?p=21206&postcount=110

Biquad Yagi 2.4Ghz Antenna

Sunday, October 21st, 2007

At las time a lot of hits came from a Poland there are some good wifi forums but I cant find online translator 🙁

Here one interesting antenna from diy.wifi-live.pl

This is some strange Biquad and Yagi hybrid.

biquad yagi antenna

Dimensions :

/odległości:

deflektor- 36
/19
quad- 34
/17
direktor1 33
/17
direktor2 32
/17
direktor3 31
/17
direktor4 30
/17
direktor5 29

There are no results or testing for this antenna.

Dual-Band 2,4Ghz / 5Ghz Omni WIFI Antenna

Monday, October 15th, 2007

tew-ai75o.jpg

Here is the scans of inside – very thin pcb board is used.

dualband_omni_front1.jpgdualband_omni_back1.jpg

Some time ago I needed some 5ghz antennas – this is the first thing that I bought.

Dual-band 11a/g 7/5dBi Indoor Omni Antenna from trendnet.

The papers says :

Frequency Range 802.11a: 4.9 ~ 5.875GHz
802.11b/g: 2.4 ~ 2.5GHz
Gain 802.11a:7dBi
802.11b/g:5dBi
VSWR 2.0:1
Polarization Linear, vertical
HPBW/ Horizontal 360°
HPBW/ Vertical 802.11a:25° 802.11b/g: 35°

The stupid thing is that on the site specification and in pdf data sheets was said that this antenna have VERTICAL polarization, but now I can see that omnidirectional pattern came whit horizontal polarization!

trend5ghzpattern.jpg
This may be the reason why I am not happy whit this wifi antenna and it is still laying on my desk.
I will test it again when I have some time.

The other small wifi antenna that I have from trendnet is working great – I have small 5ghz link whit it – these days maybe will scan ti too.