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clanon
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Everything posted by clanon
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12.3 inch long x 1.02 inch diameter ferrite rod core for maximum reception 31 cms x 2.6 cms OLD AM radio variable cap i'll try in the next days and post if GOOD..,.
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Loop antenna (antena de Lazo) should be straight away design in CST... Lots of WIRE wounds and a Port at the ends... 10-30khz...i'll give it a TRY in CST LOTS of wire for that LOW... Alonso para que uso la vas a usar...(What use you're planning for this...?) https://stormwise.com/page28-VLF.htm
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Without a reflector (Omnidirectional) you'll need 1 meter and some to get close to 15dbi (15-20 half waves) With reflector you could have 15dbi at under One meter...
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Insulators , supports should be on the middle of ANY half wave dipole (ti minimize losses and mismatches)
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Interesting design , don't know about performance... Polyurethane aluminum PATCHES Manufacturer
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Jomy , NEED HELP this SUCKER doesn't take energy , Z is wrong (Too LOW) S11 (too LOW) almost 0 Vswr HIGH as HELL (PS: tried everything can't make it "dance")
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manufacturer site
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Originally designed for 5.8 (with HIGH LOSSES and low gain) Inverse engineered to 2,4 ghz wjith High GAIN and Better Efficiency s on FR4 ...modelling right now...almost there...Close to 20dbi
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I'd never found a good feed for DEEP DISHES ( i have a 1,26 m , 0.31 m deep dish F/d 0.25 ) THIS IS IT This brasilian colleague designed an small patch for 432 MHZ satélite double polarization (i only needed ONE) What's most important to me are the 180 degrees of illumination at about -6 db of gain... -6dB beamwidth of around 180 deg (good for f/D ratios 0.25 (focal plane dishes) to 0.3) -6dB in beamwidth corresponds to a -10dB edge illumination (max gain) since there is an additional -4dB spreading loss to the edge at these low f/D ratios. the coax is running inside a graphite tube (all i have at hand from a broken arrow) center of patch and coming back from behind
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2,1 mts diameter , i assume
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Up to 9 dBi gain between 1710 and 2700 MHz, and 6 dBi gain between 600 MHz and 900 MHz. +/- 45 degreee cross-polarization. https://www.youtube.com/watch?v=vm4hV1ITrp0
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something is OFF , i think it is SPILLING signal OUTSIDE the dish , maybe with some wall side box...or a RIM...
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Originally for wimax 3.5 ghz (it SHOULD be more than 18dbi) (circular Polarization) Trying to rebuilt it for 2.4 ghz PS: doubts about the Dielectric material...(rexolite , fiber glass...?) very similar to http://Ionica 19 db , 3.5 ghz
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MOVE ALL up FRONT (directors) Extend Boom tube to allow extra length
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18dbi
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OKAY , just talking about THIS (more info)
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Distances to FIRST director and to REFLECTOR MUST be reviewed! CAN't OPEN it ( NEWER version)
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what happens if the FOLDED dipole is HORIZONTAL ?
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INTEGRAL is FAST , BUT you have to check accuracy tHE ONLY ONE THAT WORKED ON 1,26 MTS DISH
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ALWAYS FD solver shows a SHIFT in RESONANCE center and POORER S11...(but it is RECOMMENDED for WIRES)
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The original FEED is for a 6' 7' 1,8mts 2.1 mts diameter GRILL Parabolic Antenna F/d ratio is important (te indica el tipo de iluminación necesaria par eficiencia mayor a: digamos 70 % , que es lo que se busca como objetivo) Having the original feed wouldn't be better to copy the original GRILL
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more info
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Harry HOW can i put the settings from 1 ? on VSWR...is from zero default
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UHF yagis