clanon

try a cylindrical or conical reflector ...( might get a couple of more dbs...)

Never personally liked the dipole array on PCB...too much space and little gain...

But this is interesting due to the BANDWIDTH...(which is only 70-80 mhz needed for 2.4)

maybe an LTE adaptation could work...ALL METAL...

2 hours ago, streetdog said:

thanks can you clarify that is drill for the sma connector will comes in manfacturing or need to make it later? thanks

 

All you need for a PLANAR (2d Microstrip PCB) antenna is a 2D drawing , PCB are standard thickness (single or double sided copper layer) the dielectric is the key FR4 Teflon Rogers...YOU NEED THAT VALUE to simulate it right...drilling is done after burning the NOT NEEDED copper zones...a small project could easily be done on COPPER TAPE and any dielectric support (CARDBOARD-STYROFOAM...etc)and would work BETTER than the same on PCB.LOOKS DON't MATTER Energy doesn't care.Only sees METAL=GOOD , Air = good , Dielectrics=BAD....

I added an SMA and BACKPLANE...is NOT GOOD...it is ok as practice but no use on the real world , Efficiency is BAD...gain is little...

Thank YOU , Jomy.

11 hours ago, overlordox said:

Those usb extensions are expensive i cannot aford it

un cable de RED te sirve no mas de 4-5 metros

DXF or DWG should be enough...to export to pcb

i have an older (2020) cst version if you post the STL file i could run it...(what solver did you use...?)

722 v2 CHICO!

a 200 metros con cualquier cosa de mas de 15dbi debería conectar y mantener señal Puedes soldar directo a la usb (cable lo mas corto posible)y desde  allí cable usb hasta 4-5 metros

From 200 meters anything above 15dbi should do it , Can you solder the USB card closer to the antenna and then a longer USB cable (no loss) 75ohm catv cable no no

On 8/26/2025 at 2:41 PM, Sukesh said:

Yes, but want beam width 11deg in small size around 400mm max length and width100mm

11 degrees is Elevation (UP and Down)  not Width (Azimuth) on this...and you aren't specifying the Polarization (is it Vertical...?)

7 hours ago, Sukesh said:

I want same performance in 350mm max lengths. 

Higher the Dielectric constant...the smaller the antenna ...and BIGGER the LOSSES...(unless is Teflon sheet) or Foam...

The one you posted should be closer to 15 degrees Elevation lobe , AZIMUTH...closer to 120...you should check the 2d Plot

8 hours ago, Aksonx2 said:

Maple Wireless 5.5 g , Gain 20 dBi

The antenna is a little loose ...

 

is it regular FR4 ...how good is the S11...?

looks like Fiberglass...and how THICK...?

33 minutes ago, heinkel said:

+3db You've doubled the profit, good design, Clanon. I can't open it because my CST is from 2012. Is there any possibility of backwards compatibility with the new CSTs?

Me ganaste loco , el mio es de 2020...LMAO!

WHICH ONE you need...? The LPDA you open the 2D DXF (just one) make it double Asign thickness of the material you want (one over the other) and then add a BRIDGE  (rectangle sheet at the END , Wide part)

You need an STL from CST and it would open as ALL SOLIDS not materials (dielectric , pec ,etc) designated...and then TWEAK IT...

On 8/12/2025 at 9:59 AM, Admin said:

Okay Clanon, I'll try to do this too...!!!

Yes, that's it....

 

 

RondCone.cst

WAY MORE REACTIVE than square...

Jomy did you try a conical (cilinder) Horn ?...(should be smoother all around)

PS: the TEM UWB should have a new post...imho

I see it done with Brass sheet (rigid no need for dielectric support)  OR copper Tape (0,0254 mm) over Polystyrene foam...

19 hours ago, Docgi said:

There is one mistake in dimensions. You can see the rigth one below

is that a BALUN...? looks like it...

Nice project (for UWB)...could you post the 3d (.stl .hfss or .aedt) to run it through cst up to 6ghz , and gain seems to go all the WAY to the problematic zone (under 500mhz) nice for an SDR PS: I went with LPDA , cone elemwents...but NOT happy with the results...

1 hour ago, Jayakumaran S said:

Sir, how can we identify whether an antenna is circularly, vertically, or horizontally polarized? Is there any specific parameter in CST that indicates this polarization type?

11 hours ago, Jayakumaran S said:

Sir, I am planning to purchase a laptop with a budget of INR 50,000. I require it to support CST, HFSS, and other high-end design applications. Kindly share the recommended specifications, so I can choose a suitable model accordingly.

RAM size  8 gb at least (ddr4 better) and Processor cores (8 would be best)  are important...(CST mws before 2020 would require less resources) but I used it with 6gb of ram and 2 cores (intel is better) check the GPU acceleration capacity...(heavier than games) used gaming laptop maybe...

You are using a Circular polarized antenna and tryin to receive a VERTICAL polarized signal...NO GOOD...and  shifted band frequency too...

YOUR antenna should provide Vertical polarization and be centered at 920 MHZ with a Bandwidth of 80 MHZ (880-960) Yagi Vertical polarized...

On 7/19/2025 at 9:27 PM, Anjana said:

I tried my anttenna and this is the results. My signal tower is 8km far from me. Can you give me another anntenna for bad 5 (850mhz) 15dBi for try

 

RSSI (signal and Quality (packets received transmited) are too low...you need over 15 dbi at least ...try to make a big reflector (wire mesh , chicken coup wire...at least 1 m , put it in the back of your antenna) Router (waterproof) close by the antenna (losing signal on cables)

LiteVNA measurements

On 7/16/2025 at 10:17 AM, Jayakumaran S said:

Sir, may I use the formula provided in CST to determine the size of the wave port in HFSS?

Also, could you please advise on the appropriate height of the radiation box?