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clanon
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Everything posted by clanon
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TWO folded dipoles (300 ohms in ideal conditions) with one 75 ohms cable and sometimes split at the end on Two pigtails...and lots of SILICONE...I think they're HITTING the RIGHT frequency and getting around 15 or more db...dunno REFLECTOR SIZE is GOOD , tho
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https://toko.baliwae.com/product_info.php?products_id=3175
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is two Yagi Folded dipole adjusted to hit the high and low Frequencies...i tried one and it has SEVERAL resonance PEAKS that must fall in your frequencies of interest https://www.wifi-antennas.com/topic/2101-698-3800-mhz-yagi/?page=1 the adaptation inside the box is REALLY important... Gain should be close to 15 db at best
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Trying to get more gain on small and easy footprint size, with FA20 patches as reference.
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antenna should have X , Y size incremented (width and length) Frecuency of results divide by Wanted frecuency...that ratio is Increment of x y size
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The lack of REFLECTOR and WAVEGUIDE make it a quarter wave Yagi , Probe fed (never seen)
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0D option ...what is it ?
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my bad! it cant never be under 1:1
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It's wideband by several PEAKS of resonance...if your frecuency of interest doesn't FALL inside one of those you're out of luck... So it's NOT continuos WIDEBAND like other designs...
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Is THIS right...? (the values for swr...)?
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Copy (bad) of Ionnica over 20 dbi...?
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ALVARION WIMAX
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could be close to 15dbi if built right...
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what version is it ? the modem https://www.youtube.com/watch?app=desktop&v=gWqWh86B200
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VSWR on antenna MISSMATCH (it could be overheating) if the firmware allows it you'll see it as signals coming and going away...high strength and then 0...
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1.ALL antennas show reciprocity TX and RX are the SAME....BUT if you have little power high VSWR and LOTS of PLASTIC you'll lose energy (efficiency) speed would suffer...(Having the antenna pointed at the RIGHT direction and ANGLE) 2 .that looks like PVC cover , it's good for water insulation but it CHANGES ALL calculations from FREE SPACE
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tower mapper by PROVIDER
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That one NC LINK being ALL METAL should OUTPERFORM the one on PCB...Less losses...higher efficiency...more gain
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MiMo (2T2R) it's the improvement over the max for a regular wifi (150Mbits/s (15Mbytes/s)) and it should start (on OPTIMAL conditions) at 300Mbps (30Mbytes/s) and UP Of course it depends in SIGNAL STRENGTH (- db) and QUALITY (Packets Lost)
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2.4ghz (2400Mhz) anything above 500mhz behaves completely different to ...say 10 khz...At this high frequencies the cable behaves more like a waveguide than a cable...Coaxial shield keep the wave RF inside avoiding RADIATION spills and EM interactions...Impedance must be kept at 50 ohms from generator to load (antenna) any changes missadaptations would mean wasted energy or in the worst cases (like yours) energy bouncing back to the generator (wifi card) this is called VSWR and must be kept under 2:1
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then WITHOUT obstacles...TREES BUILDINGS (Line of SIGHT) you'll be fine with anything over 16 dbi...(Real 16 dbi) MORE BETTER...but you gonna need to POINT that antena PRECISELY) watching the quality of the signal no PARABOLIC DISH...you gonna have to BUILD a GRID (wire mesh) if WINDY or a METAL (ANY metal) SHEET curved
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