Question about EnGenius EOC-3220 (EOC3220)

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How long I will gain if I'm using 15dbi omni-antenna + 100W signal booster?

I have planned to deploy 15dbi omni-antenna with 100W signal booster, If I can gain more than 25 kilometers in 360 degrees maybe that's the best for me move-on. What are the possibility of disadvantages and advantages if I will going to used that certain specification?

Please help me I will give you 100% solved I sound interested.

Best regards,


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Re: How long I will gain if I'm using 15dbi omni-antenna...

Here is a chart that will help you. with more info you can get more exact, but to answer what I think is your question, it would be about 1-3 miles. Without knowing the Mbps I can't be more accurate.
as far as advantages, theres no more than any other except for distance. Disadvantage...don't see any.

Posted on Nov 02, 2007

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Hi Philip,

To answer your question, from a single TX/RX device (your WiFi unit) to a dual antenna, what you would need as a splitter is more commonly called a "phasing harness".

A phasing harness is a balanced transmission line which is used when you want to stack or use two antennas from a single radio output. In lower frequencies it is made from a pair of 75 ohms high grade coaxial cable of equal odd quarter wavelengths of the operating frequency. The joint at the middle is connected with a “tee” connector with another cable (standard 50 ohms cable) that runs down to the radio. The free ends of the 2 75 ohms coax are then connected to the two antennas. This  site shows phasing harness for multiple antennas.

For microwave region, since losses tends to be magnified, commercial grade are often used rather than home brewed. Examples are shown in this page.

Alternately and perhaps simpler is to just remove the reflector of the 8Dbi patch antenna of the EOC 3220. Normally in designs such as the 3220, the active patch antenna is soldered on one side of the PCB.  At the back is another which looks just like it but slightly bigger. This is the reflector.  The reflector has two (2) purposes:
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If you decide to remove the reflector, there will be 3 effects on the performance of your TX/RX device:
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3.    it is highly possible that you will have small side lobes as well.

This   document  would give you an idea on the lobes and radiation patterns.

Good luck.

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