Posts Tagged ‘reflector’

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Trendnet Dual Band Panel WiFi Antenna

Tuesday, February 17th, 2009

Trendnet Dual Band WIFI Panel Antenna

Here one small antenna witch I have from a long time. I am happy from it – I use it on 5.3ghz band and it works well – it gives what is promised.

Not like omnidirecional trendnet antenna – whitch I do not like

Some specs :

Name :  Dual-Band 11a/g 8/6dBi Indoor Directional Antenna w/ Mounting TEW-AI86DB / mine is not with mounting but the PCB and specs are the same /

Gain : 802.11b/g: 8dBi  802.11b/g: 6dBi

VSWR : 2.0:1

Polarization : Linear, Vertical

Horizontal : 802.11a: 50°  802.11b/g: 75°

Vertical : 802.11a: 60°  802.11b/g: 70°

Dual-Band 802.11a/g 8/6dBi Indoor

Antenna Diagram

dual-band-wifi-pannel-antenna-pattern

You can find documentation on trendnet site.

http://www.trendnet.com/langen/products/proddetail.asp?prod=125_TEW-AI86DB&cat=68

And some scans of the pcb of this wifi antenna

Trendnet Dual Band WIFI Antenna REFLECTOR

Trendnet Dual Band WIFI Antenna REFLECTOR

Trendnet Dual Band WIFI Antenna SIDE 1

Trendnet Dual Band WIFI Antenna SIDE 1

Trendnet Dual Band WIFI Antenna SIDE 2

Trendnet Dual Band WIFI Antenna SIDE 2

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SWR tests of wifi panel antennas

Wednesday, December 19th, 2007

Tere are some interesting result of testing panel antenna for wifi band on Russian site : http://www.lan23.ru/forum/showthread.php?t=1009

Antenna is tested when the pcb print is looking toward  to a reflector and back.

You get lower SWR when the pint is looking to a reflector – pictures shows all :

SWR panel wifi antennaSWR panel wifi antenna

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Backfire Helix Feed

Friday, September 21st, 2007

First – I never made any helix antennas, nor spirals or anything similar. Consider this as warning 🙂 BUT in the HAM world spiral feeders used in dishes is something very often used.

http://members.cox.net/nx7u/ao40/backfire/backfire.htm

dishplusfeed1.jpg

Very simple – small spiral and reflector in front of the dish.

It looks like that in the spirals there are several modes endfire and the normal-mode. This modes are explained on the side, but more reading is needed. Also there is right and left hand rule in these antennas.

On the page is a NEC code witch may be useful to simulate this antenna.

Dimensions on the pictures are given for 2401MHz but the peak for this is around 2.3ghz so for tests whit wifi we must change dimensions a little.

If anyone have the references as PDF – do not bother to send them to me 🙂

more pics :

feedcloseup1.jpgsideview1.jpgdownthehelix.jpgaxialratio.jpgpolarplot.jpg

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