clanon

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)

You use WHAT WORKS (that'll be DISCRETE PORT 1st and WAVE Port at the end) Same for Solver mesh settings

Face select inner+pet+shield+outer edge , then assign wave port (ALL of them should be leveled) puting a PORT on the END of an ANTENNA is a NO-NO

Still workin on it (good antennas BAD FEED NETWORKS !) I'll upload it if it works give me time After the simulation is OK on Port impedance Z (should be 50 ohms ) Electronics = Cables= Antennas (50Ohms=50Ohms=50ohms)

Those TWO collineal NEED an adapter to SHOW 100 Ohms in the middle (50ohms on coax) Two identical antennas of 50ohms would give 25ohms in the middle not right I ran one alone and is promising...

Those TWO collineal (2,4ghz) NEED an adapter to SHOW 100 Ohms in the middle (50ohms on coax) Two identical antennas of 50ohms would give 25ohms in the middle not right

First of ALL BOTH Your Coax cable HAVE NO SHIELD... Adding a SHIELD present a NEW problem (they would be DANGLING in the AIR -No Connected to ANYTHING)

Use THIS is more PRECISE (PS: also try rotating the tube gradually to get the POLARIZATION in the SWEET SPOT) Good work!

Yeah , that figures...it should have some impact on Simulation (as Ferrite FeO2)

BI CONE , central feed wide band (base is dielectric)

BI CONE , central feed wide band (base is dielectric)

WAVY response Wide band..

THIS I SEE might be YOUR main problem...(Cut again to eliminate the bridging between CONES , it should be open and the disc is plastic)