Welcome to WIFI Antennas
Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.
clanon
Members-
Content count
844 -
Joined
-
Last visited
Everything posted by 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...
-
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.
-
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
-
11 degrees is Elevation (UP and Down) not Width (Azimuth) on this...and you aren't specifying the Polarization (is it Vertical...?)
-
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
-
is it regular FR4 ...how good is the S11...? looks like Fiberglass...and how THICK...?
-
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...
-
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...
-
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...
-
-
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...
-
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
-
Been beating around the bush for years to find a Good 4x4 patch array... Higher than 21 dbi , good impedance through the whole band,low enough vswr, under -20dbi side lobes... the original design is for 12,5 ghz and almost none side-lobes Power distribution Ratio 1:5:5:1 Changed it to WiFi , distribution ratio 1:1:1:1 (Original design Eliminated Sidelobes at the COST of 1,5-2dbi of gain) I'm happy (some testing still needed ) REAL dielectric constant of Polystyrene foam is a guess (1.02-1.05)