clanon

It seems they use VIVALDIs (modified) on pcb for this...

What about the PCB , ...?

FR4 or something better...?

14 hours ago, Harry36 said:

balun to a neighboring dipole?

1:1 Pawsey stub...?

is it the same on the back of the PCB...(the leaf shapes)

is it a DUPLEXER...?

and WHAT about the REST of the BOARD...?

28 minutes ago, a.ndiaye@ said:

the goal is to get S11<-20DB and not resonnance at S21..

 

S11 is high Q (more than okay)@13ghz

S22  (@17ghz) not so high Q 

What's the function of this MIXER...getting and S1 + S2  , S1 - S2...

Sorry it isn't clear for me...

besides the card you show on the first post seems to TAKE SIGNAL out...(and is incomplete)

OK , this is what i got (low precision so take it with a grain of salt)

tell if i'm close or far away from goal...

it seems there's ASSYMETRY from 2:2 (and its okay from 1:1

What about the REST of the BOARD you know is COUPLED right...?

and there are missing components , there...a cap maybe...

Electric and Magnetic fields are ALWAYS at 90 degrees per Maxwells equations ...(and nature)

What make it electric or magnetic is the field orientation Vertical or Horizontal and their LENGTH

YEP , those are Dipole Magneto Electric (MED) ,

the quarter wave at 90 degrees with reflector (supports) are Magnetic fields (0 volts half wave centers could be in touch with reflector) is were you usually put metal supports or screws bolts. etc (yagi)

and the "leaves" are electric field (HALF wave ... being feed in the middle a DIPOLE)

Moderate gain , 2 ports (mimo) 2 polarizations  WIDE BAND

As I understand it...

is it me...? i see TWO antennas with TWO PORTS each...?

this are microwave links designs from Israel ...don't remember the brand , tho ...Alvarion ...Ceragon ...Radwin... (more Gain and 2 x Mimo 2x2)

what graph do you need...?

(i'm working on it)

i didn't see it...GREAT!

i'll check it now

CAN 't OPEN it is newer version...Cst2020 mine 

parallel stripes (transmission line )  width...separation ?

distance to reflector...?

the green PCB seems DOUBLE SIDED with lots of THROUGH HOLES...

On 16/9/2021 at 9:20 AM, Harry36 said:

Version3

 

 

 

https://www.mdpi.com/2079-9292/9/10/1574/htm

looks a lot like EIA dual dipole feed ...but wideband

Yeah , you're RIGHT...

maybe ANGLED slots in a little box (cube or sphere) 

1 hour ago, Harry36 said:

I don't know the design of the patch so that it can cover the 1700-2700 range in MIMO mode with simple powering. 

 

Petra BB the best (i'll try two of those at 90 and see) 

MagnetoElectric Dipole (MED) more bandwidth , less gain and low efficiency on Dielectric  ( ALL metal should be better)

PS : and the TUBE DIAMETER doesn't help...either

12 to 15 dbi and a nice 50 ohms curve in the whole bandwidth...

show more details on the INFINITE like shape...

so it behaves  like 3 half waves SLOTS...?

(wideband)

What happens if that shape is multiplied into a flat BOX...?

(4 , 6 , 8 of those)

Backfiring circular patch (CHINISHIT) 

NOBODY ever got more than 27 -28 dbi at those frequencies (800 mhz to 2700 mhz )

you'll need more than 2 meters diameter to get over 30 dbi ...

ALL lies and good looks

1mm aluminum

size should be increased X,Y by 10% (1.1)

Dielectric used must be known (Boom and spacers)

impedance close to 50 from 2 to 2.5 ghz

Vswr should be adjusted (exact materials needed and Bandwidth)

"More efficient (NO DIELECTRIC) , a little more gain"