Posts Tagged ‘Omnidirectional’

12dBi MP12 Quad Stacked Omni 2.4/5 GHz Antenna

Friday, December 7th, 2007

Multipolarized antenna from wifi plus.

Blueprint is found on www.zero13wireless.net/forum visit site for more info and pictures.

Specification and pictures of the original antenna :

non line of sight antenna

• Compact Omni head design
• Dual Band Frequency
• Beamwidth: 360° Horizontal, 15° Vertical
• Quad Stack improves gain to 12dBi
7° downtilt for height installation
• Includes pole mount bracket for mast mounting up to 1.625″ O.D.

It is surprising that they give this antenna as dual band?

So this is the top omni model of this kind of antennas.

And I can’t find it on site – so it seems that it is not manufactured anymore.

And interesting part :

non line of sight antenna

MP emitting element :

non line of sight antenna

Ground mounting :

non line of sight antenna

Parts list :

non line of sight antenna

Blueprint :

non line of sight antenna

Mounting mast is wooden.

We waiting for the first test.

UPDATE – HyperLink HG2415U-PRO

Monday, December 3rd, 2007

Little but important update for HG2415U-PRO antenna – some new pics on lan32.ru forum.

Looks like rings on the upper and lower sections are bigger than these in the middle sections.

So these bigger rings connects big tubes to small central internal tubes.

lowtube2.jpg toptube.jpg

For more check forums there always can be found more info.

HyperLink HG2415U-PRO 2.4Ghz Omnidireccional 15dBi WIFI Antenna

Sunday, December 2nd, 2007

HyperLink HG2415U-PRO 2.4Ghz Omnidireccional 15dBi WIFI Antenna

Pictures are from these two forums :

www.lan23.ru and www.zero13wireless.net

First the antenna and diagram

HG2415U-PROpattern_hg2415u_pro.gif

What is happening inside :

HG2415U-PRO

Several dimensions :

HG2415U-PRO

HG2415U-PRO

But whit this last do not show us all – it cannot be used to build this antenna.

It looks like that this antenna have some strange internal parts – and its feeding point is on quite strange place.

dissasembled - tree sections of antenna

So there are tree interesting sections – middle, top and bottom.

This is TOP :

topsection.jpg

Next is Bottom :

bottomsection.jpgbottomtext.jpg

And Middle section :

middle-section.jpg

And here is the interesting part – in feed point is in the middle part of this antenna, a coax line travel trough all sections, from the connector to the “middle section” and center of the coax line is soldered to the tube which goes to the upper part of the antenna!

middle-section-feedpoint.jpg

I am not sure what is happening in the top section – russians says that this ring or piston inside is soldered to the small tube which goes out on the top – but even if it is this ring and center tube is not connected to outer big tube ?!?

Also in the bottom part this small ring is not soldered – maybe is used for tuning the antenna?

And on the all pictures seems that small inside sections tubes are smaller then small outside sections :

middle-section-third-tube.jpg

So How is madded this antenna? How it works ? What is happening inside ?

This pictures gives more questions than answers !

If anyone understand this antenna design – explain.