Another...... ??

AMD B3 Phenoms bench well

2008-03-16T00:38:00.001+07:00

After fixing their B1 and B2 revision Phenom processors with a B3 release, the new processors appear to benchmark well, beating out the B2 revision with the BIOS “fix” turned off. The new BIOS fix works around the L3 cache bug allowing for the improved performance.

Don’t get too excited–the B3 release chip isn’t readily available just yet, but should be shipping, “later this quarter…” according to Anandtech.

I will take that to mean sometime in the next few weeks as we are close to the end of this quarter. Anandtech notes that the sample chip they had ran at 2.2GHz and they could get it up to 2.6GHz with some effort. Even then, it could use some more clock to challenge Intel, who is already there but not in enough quantity to feed the market. I am starting to think that this year in the 2nd half there is room for AMD to win back some share. We shall see…

Curtain Quad Panel Wifi Antenna 18dbi

2008-02-02T17:12:00.000+07:00

This looks very crazy, oddly promising 18 dbi gain.

BUT now there are more info about this, as promised by admin of the GUW forum.

Here is all info in spanish :

http://www.guw.cl/sitio/index.php?option=com_content&task=view&id=110&Itemid=36

The author of this one is Ross Anderson and the original idea for this antenna is from 1984 year the good thing is that all the information about this one is here.

There is interesting version of this antenna build by the author. On his site he describes the how to build this panel antenna from zing fence. The original 2400mhz version is here : http://home.comcast.net/~ross_anderson/2400MHzAntenna.htm

The idea and the info : http://home.comcast.net/~ross_anderson/CurtainQuad.htm

Here some pictures from the em simulation from GUW site :

So as I see this, I can accept that this antenna works. On the site is said that this antenna outperform many commercial ones.

The diagram of this antenna and look from in front :

More pictures of this antenna build and tested for 1296Mhz and 2400mhz :

Interesting about this is the using of speaker wire for matching transformer :

“… Solder a 1+ inch piece of speaker wire to the N connector. One wire goes to the center pin; the other wire to the outside part of the connector. I drilled a small hole in the connector flange for the wire to be inserted into and soldered in place. Leave about 3/4 inch of insulation on the speaker wire (as measured where the two wires are together). This is the transformer, transforming the antenna impedance to about 50 ohms.”

There is also PDF tutorial on the GUW site : guw panel 18dbi.pdf

So this is promising design which I should test soon too. Will be interesting to find out will this design works if it is printed on PCB?

14dbi 18dbi and 20.5dbi pcb panel wifi antenna for 2.4ghz and 23dbi for 5ghz band

2008-02-02T17:04:00.000+07:00

All these antennas are “Inset-Fed Microstrip Patch Antennas“ type - and that is all from me .

Some info may be found www.mwrf.com

Also if interested Youmay search google for “quarter wavelength patch”

There was different pics of this design - it looks like it is ofen used by manufacturers.

Thanks to the comment by Christian i sow for first time 14dbi version of this panel.

A lot of different versions 14 18 and 20.5 dbi pannels 2.4ghz whit different number of pathes.
So lets begin whit 14 dbi pannel.

Original name : unknown

Gain : 14gbi

url : http://www.carookee.com/forum/

Next one is 18dbi Wimo PA-13R-18. There is a lot of links to this antenna. 16 patch element are used.

This is first posted here www.vallstedt-networks.de

18dbi picture whit dimencions

Drawing by elk form 2400mhz.net.ru PA-13R-18.rar

Third one is also new entry for me but it came out from here http://2400mhz.net.ru. This one is 20.5dbi gain.

Original name Delta DS 2400-21

posted by elk drawings DS 2400 - 21.rar

And finally one 5ghz antenna whit same type of patches used. Gain 23dbi and again 16 radiating elements are used. Found in http://www.lan23.ru/

Original name Panel 5х-19

web page : http://www.bester-ltd.ru/

drawing by igor p. panel 5.1-5.3.tif

Poland Dipole Panel Antenna

2008-02-02T15:14:00.000+07:00

8 or 19dBi - no mater for this one . Several dipoles printed on PCB board. Have more dipoles You get more dBis. Will it be 10 12 or 24 - You decide how much do You need.

This is defiantly homemade design. I have one small antenna whit only 4 dipoles - and it works great, so this antenna should work fine. Also will be easy to be rescaled for other bands - 2.4Ghz or 5Ghz only change dimension of the dipoles.

19dbi panel wifi antenna link to picture

Here is the photo from the other side of the pcb board and other part of feeding element

Picture is from this address : diy.wifi-live.pl/node/4 where also have blueprints for less dbi antenna .

On www.zero13wireless.net also has several files posted by sushisan .

Link to files 18dbipcbdipoleantenna.zip

(thx estqwerty's)

Biquad antenna for WLAN

2008-01-24T18:42:00.000+07:00

Biquad Antenna for 2.4 GHz - 802.11b/g - WiFi - WLAN After some research, I found out that the simplest type of homemade WLAN antenna is BiQuad antenna. Many sites provide good instruction on how to assemble it. (refer below) Biquad Antenna Construction Biquad Sector antenna for 2.4 GHz Building a biquad antenna for wireless 802.11b Trevor Marshall BiQuad 802.11b Antenna [My favorite] I'm not going to repeat it. My Antenna So I start by recycling some parts that I found in my workshop and construct it. I took about 10-20 min. for me to finished it. The critical process is to make the element. With proper method and dimension this thing will work. Good Luck!!!