HyperLink HG2415U-PRO 2.4Ghz Omnidireccional 15dBi WIFI Antenna
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
What is happening inside :
Several dimensions :
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.
So there are tree interesting sections - middle, top and bottom.
This is TOP :
Next is Bottom :
And Middle section :
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!
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 :
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.
Tags: 15dbi, antenna design, HG2415U-PRO, hyperlink, Omnidirectional, wifi antenna
December 3rd, 2007 at 6:01 pm
[...] but important update for HG2415U-PRO antenna - some new pics on lan32.ru [...]
April 28th, 2008 at 9:47 pm
Each sector of the antenna needs to be 1/2 a wavelength long, multiplied by the velocity factor of the cable. The velocity factor of RG-213 is 0.66. If you decide to use a different cable (such as LMR-400), then you need to get the velocity factor of that cable (which will be different), and recalculate all the dimensions.
V * C 0.66 * 299792458
1/2 wavelength = —— = —————- = 0.0405m = 40.5mm
2 * F 2 * 2441000000
V = Velocity Factor of RG213 = 0.66
C = Speed of light = 299792458
F = Frequency of Signal = 2441000000 (mid point of 2.4Ghz range)
The 1/4 wave element is not adjusted by the Velocity factor, as it is in the open, so it works out at just 31 mm long, giving a total antenna length of 355 mm + fly lead.
All of the parts needed to make this antenna are available cheaply from either Maplin or any DIY shop. You need the following:
1 meter RG-213U cable (available by the meter from Maplin). This is enough for two antennas. Buy more for whatever fly lead length you want.
1 N connector. Depending on what you want to connect the antenna to, use either male or female connectors, and inline or bulkhead. Remember that inline connectors need to fit 10 mm diameter RG-213 cable.
20 mm PVC conduit (available from any DIY store) It should have a 20 mm inside diameter, and 22 mm outside.
22 mm pipe clips (depending on how you want to mount the antenna). Pipe clips make mounting the antenna easy.
You also need the following standard tools.
Millimeter ruler for measuring
Junior hacksaw
Stanley blade knife
Pliers
Standard soldering iron (you don’t need a heavy duty one) and solder
Scraps of wood to make a jig to aid soldering
Bench or vice to hold the cable while you cut it
April 28th, 2008 at 10:18 pm
vacarosie200 : this антенна up is NOT simple coax antenna !
I cutter miles of coax cable trying to make this you talking about - this types of coax antenna just NOT work for me.
April 29th, 2008 at 6:59 pm
i made a 12dbi of this antenna… it’s work on a conectetion about 500 meters