Novice need help

[Kledi 0]

Hello guys, thanks for this amazing forum, im in antennas since 1 year but i have some questions!

Antennas like this, are all grounded? I mean if i put the multimeter to check the conductivity, there is conductivity from the main patch to the reflector, or they are isolated?

 

 

I need to  build an antenna feed for 2.6ghz lte to put it on my off-set dish,  and also a 1.8ghz..

 

thanks in advance 

Edited June 13, 2020 by Kledi

[Admin 2421]

,,,,not, all antenna elements ,are  not isolated...!!!

[Kledi 0]

1 hour ago, Admin said:

,,,,not, all antenna elements ,are  not isolated...!!!

Thanks for the reply,

Whysome antennas have driven element isolated from the reflector like the batwing and some other models not?

[Admin 2421]

,,, is not a big difference, with the only specification that in the case of using insulators short circuits can occur in case of electrostatic discharge (lightning)...!!!

[clanon 215]

19 hours ago, Kledi said:

Hello guys, thanks for this amazing forum, im in antennas since 1 year but i have some questions!

Antennas like this, are all grounded? I mean if i put the multimeter to check the conductivity, there is conductivity from the main patch to the reflector, or they are isolated?

 

 

I need to  build an antenna feed for 2.6ghz lte to put it on my off-set dish,  and also a 1.8ghz..

 

thanks in advance 

Usually if you put  a screw o rivet , etc right on a CURRENT MAX. right in the electrical MIDDLE Point (MAX CURRENT -ZERO VOLT) a node (point of zero RF voltage) at their centre, so they can be attached to a conductive metal support at that point without need of insulation, without disturbing their electrical operation (ANY metal or dielectric added to a design...CHANGES all characteristics and it must be simulated again...

With the added benefit of  LIGHTING PROTECTION if you put the whole thing to GROUND (tower and all)

Edited June 14, 2020 by clanon