5.2Ghz wifi link helix antenna experiment.

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5.2Ghz wifi link helix antenna experiment.

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
5.2Ghz wifi link helix antenna experiment.
5.2Ghz wifi link helix antenna experiment.
2014-01-03 21:21:35
Region : Argentina

Model : TL-WDR4900

Hardware Version : V1

Firmware Version :

ISP :


Hi
I have two 4900 one wired etherenet in bridge mode and one as 5.2Ghz AP to 2.4GHz normal wifi distributor.
I have build 2* 5.2 ghz helix antennas with about 15db gain. and about 300Mhz bw at -1db,
the plan is to share internett with my nabour using the 5.2Ghz link as the transfeer chanel.

I have not test the system to a very high extend, but it seams to work more than less,
I know I am running a risk of using an home made external antenna on one of the ports as I have not measured the antenna impenance, as if it is very far from 50 ohm there is a chance that I burn out one 5.2Ghz PA.

I have found the 5.2Ghz signal monitor in the ruter interhphase and showing 40 or 20 or 8 db the different tests setups and locations of the units, I wonder here if that actually shoud be a negativ number?

To improve my home made antenna tests here it would be good if I could switch off the PA for the tow other 5.2Ghz ports by software, or I can replace 2 antennas with a 50ohm SMA 6ghz 2W rated resistor terminal.

How is the antennas used: One RX and one TX / are they simulataniously transmitting and reseiving the same data/signal or do they work more independently i am only talking about the 5.2Ghz systems.

I hope some one understand what I am trying to say here?
Yngve.
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Re:5.2Ghz wifi link helix antenna experiment.
2014-01-04 00:13:47
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Re:5.2Ghz wifi link helix antenna experiment.
2014-01-04 17:41:17
What is the maximum output of a single antenna connector?
Any high gain antenna greater than the output limit might be pointless.
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Re:5.2Ghz wifi link helix antenna experiment.
2014-01-05 01:44:20

soma wrote

What is the maximum output of a single antenna connector?
Any high gain antenna greater than the output limit might be pointless.


The directional antenna I have made has theoretically 15db gain compare to an isotropic radiator.
I have not tested every thing out yet.
As the modulation is something like PSK / FSK it can actually affect the performance if it is like all the 3 PA is transmitting the same signal and there is different length from the PAs to the antennas, than the resultant signal at the Receiver end will be quite disturbed, as the 3 signals actually has different length to travel and will create problems when it comes to phase shift detection.
Is there any that know how these 3 PA systems works? Are they one commingle system or do the 3 antenna channels works independently?
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Re:5.2Ghz wifi link helix antenna experiment.
2014-01-05 01:49:06

RAH-66 wrote



I currently has these antennas indoor, pointing to each other through normal windows. I need to make them more weather protected if I am going to set them outdoor as the weather here in Norway is not actually dry as Sahara.
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