N78 Antenna

[papagayor 17]

Have seen, trying but all these numbers look UFO to me

[Admin 2769]

Try this too ...

3.52-1ghz.cst

[papagayor 17]

You'll make me go on buying a new laptop as these calculations are very heavy. I own a Lenovo L490 with 8365U, running Debian and Virtualbox running Win10 which then run CST!!!

[papagayor 17]

Finished, how does it looks? Need more information?

[papagayor 17]

I'm not sure about tubes height, I'll try to lower tubes at a distance of 1/4λ as this is the proposed distance I have seen online samples

[Admin 2769]

Yes, that's about it...still needs work...!11

[Admin 2769]

,,,it's also possible...with cantenna...

 

 

[papagayor 17]

You mean to attach a yagi-disk as director into a cantenna  but using probes for signal as in cantenna? Or just put the whole construction in cantenna box for better performance? Cannot understand this plan.

[Admin 2769]

Yes, there are two versions of the cantena, a simple one and a combined one.

[papagayor 17]

Modified the antenna but I'm getting errors, by your free time have a look and correct it please

3300-3800-1 MHz BESTER.cst

[Admin 2769]

Here's the problem, you have to keep this in mind....!!!

[papagayor 17]

I think it is better

3300-3800-OPT.cst

[papagayor 17]

OLE, I think getting better by working on CST, that's my new design for a similar to Kathrein element, not so good but looks to work, also if mounted on a parabolic dish, maybe it give much more gain. Now trying to decrease the VSWR

KathreinPLAN.cst

[clanon 305]

when looking for Interference between solids , watch closely if you want to TRIM the first one (metal overlapping dielectric) or INSERT the Dielectric into the METAL that overlaps... TRIM or INSERT are the most useful commands before simulation...

[papagayor 17]

Thank you my friend, I'm new on CST design but trying to learn by seeking online for help, also continue to design different models and simulate them for knowledge. I liked the Kathrein antenna design that is simple and very stable and trying to make a prototype at 3.5GHz center frequency and a bandwidth of 3.3-3.8 because that is the working 5G area in Greece

[clanon 305]

9 minutes ago, papagayor said:

Thank you my friend, I'm new on CST design but trying to learn by seeking online for help, also continue to design different models and simulate them for knowledge. I liked the Kathrein antenna design that is simple and very stable and trying to make a prototype at 3.5GHz center frequency and a bandwidth of 3.3-3.8 because that is the working 5G area in Greece

...find one working HERE or anywhere and SCALE DOWN-UP to 3.5ghz that's the easiest way...(You'll NEED the CST or 3d model)

[papagayor 17]

Seeking for something similar but no luck, so decided to go on by trying different procedures on design according to this one:https://www.rfelement.com/products-72.html

[Alumni 1]

On 24/4/2025 at 6:21 AM, papagayor said:

Thank you very much sir, but please can't my drawings be modified to work in this area? Because they're easy to be made for my skills. Also a dual polarized batwing with two ports would interesting.

How do you feed this, Not easy to make. What do you think.

 

[clanon 305]

39 minutes ago, Alumni said:

How do you feed this, Not easy to make. What do you think.

 

What's the plan...mimo Circular polarization...V and H pol...?

[papagayor 17]

So, back again after Summer work. Going on constructions and need to know something about a Bester drawing Dual port antenna placement, I attach a plan and want to learn what is the correct placement for the antenna on a satellite disk:

Bester.pdf

[papagayor 17]

Please Ignore above post, it has been answered.