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clanon
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Everything posted by clanon
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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
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What about the REST of the BOARD you know is COUPLED right...? and there are missing components , there...a cap maybe...
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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
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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...
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is it me...? i see TWO antennas with TWO PORTS each...?
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this are microwave links designs from Israel ...don't remember the brand , tho ...Alvarion ...Ceragon ...Radwin... (more Gain and 2 x Mimo 2x2)
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what graph do you need...? (i'm working on it)
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i didn't see it...GREAT! i'll check it now CAN 't OPEN it is newer version...Cst2020 mine
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parallel stripes (transmission line ) width...separation ? distance to reflector...?
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the green PCB seems DOUBLE SIDED with lots of THROUGH HOLES...
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https://www.mdpi.com/2079-9292/9/10/1574/htm
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looks a lot like EIA dual dipole feed ...but wideband
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Yeah , you're RIGHT... maybe ANGLED slots in a little box (cube or sphere)
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Petra BB the best (i'll try two of those at 90 and see)
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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
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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)
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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
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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"
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More efficient (NO DIELECTRIC) , a little more gain , imho
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it should work a BALUN 4:1 is NECESSARY
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Pre made , wonderful...and all dimensions should be available before buying it , for trial and error Jomy the supports seems to be PTFE (teflon)
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the Blue and RED coax should be NEW CABLES straight to the card...(if possible to solder in there) High losses