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clanon

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Posts posted by clanon

  1. Posted

    14 hours ago, Marcello971 said:

    If I understood well, this antenna should have a sufficient gain that I need (18 dBi). 

    I have to create 2 identical antennas with a parabolic disc (1 for TX and 1 for RX). The only think we shoud add in the design is the additional feed since the wirless router has 2 SMA connectors.

    Before to start to build the antennas I will wait the results from the simulation and a confirmation from Adim.

    Please correct me if I said something wrong.

    Thanks 

    if you choose parabolic dish reflector 

    you'll need 

    any good TWO PORTS feed for that dish (mimo 2Tx2Rx REQUIRES two cables , two antennas or one at 90 degrees between two ports) to get FULL SPEED it maight work okay with just ONE cable-port but NOT FULL SPEED  (depends on HOW it was configured , firmware settings)

    1 person likes this

  7. Posted

    shabra , what swarg is saying (i think) is that you should MAKE sure that the base of the MED sees a GND (center of grid) at the SAME point like in the BASE station (telecom antenna) which means HOLDING it from OUTSIDE and BEHIND with the circle (director) pointing in to the GRID...

    And that the lobe of this MED is FAT and goes in two directions (polarizations) meaning that you are spilling some radiation since your reflector (grid) is almost rectangular (Circular would be better to reflect both dipoles) which are at 90 degrees

    33-997-212-04.jpg

    2 people like this

  9. Posted

    if TOLERANCES (diameters on shield , leads , PCBs) are not maintained , impedance would change. I would solder straight from modem , card to antenna , if possible. Keeping distances as short as possible and impedance (cable shape ,curves) as minimum as possible. ALL connectors have loses imho

    2 people like this

  14. Posted

    26 minutes ago, Harry36 said:

    Unfortunately, without the exact dimensions (although I do not see any differences from the original), I do not presume to judge the frequency range, perhaps the reduction of the reflector and the plastic case with the rod played a role. But we all see the fact of theft without the slightest alteration with our own eyes. This is a very sad page in the history of the company.

    i catched Mikrotik stealing BUT developing over the theft here