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clanon
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Everything posted by clanon
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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
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GREAT WORK , ROMAN! Keep us posted.
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Original SMCANT-DIFP11 dimensions
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Off course it is CIRCULAR POLARIZATION , the only path left for the energy to conduct due to the sector CUT OUT Andrew Screw the pooch sometimes and he NEVER correct himself...(delete comments that contradict him , even if they ARE RIGHT)
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I didn't want to make this antenna! The image was laid out as an example. Make a narrowband - no problem! I wanted a broadband antenna from AL. stripes. The same you built , BUT with FOLDED dipole DIRECTORS...Directional , high Gain , WIDEBAND
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"As an example, consider two adjacent ports, both having reflection of -9.5 dB (VSWR=2:1), resulting in EVM=-19.0dB. From the Figure 1, error limits are +1.0/-0.9 dB and ± 6.4°. By reducing reflection of one of the ports to -20.8dB (VSWR=1.2:1), corresponding to EVM=-30.3dB, error limits reduce to ±0.3dB and ±1.8°. It should be emphasized that amplitude and phase errors are exclusive, namely at a frequency where amplitude error peaks, the phase error is minimal and vice versa." "The effect of changed output VSWR with non-ideal load VSWR reflected by the system will cause additional amplitude and phase errors." PS: we tend to forget that THIS are NO OLD ANALOG RADIOS , Amplitud , PHASE and Frequency are USED for MODULATION (Higher the speed bigger the CONSTELLATION vg : 256QAM) and ALL are adversely affected by VSWR , impedance changes ,etc.You'll notice as a decreased speed due to the need for RE-TRANSMISSION...RXQ in LINUX
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from where...?
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Jomy if you pass the cst i could try make it an 75 ohms LFA dipole...
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You need to locate TWO points in map (New Site 1 and New Site 2) + this info
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you gonna need TWO of those at 90 degrees...+ some separation (a couple of cms)
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nice to try for an ARRAY...4 - 8 of those
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if you choose parabolic dish reflector you'll need any good TWO PORTS feed for that dish (mimo 2Tx2Rx REQUIRES two cables , two antennas or one at 90 degrees between two ports) to get FULL SPEED it maight work okay with just ONE cable-port but NOT FULL SPEED (depends on HOW it was configured , firmware settings)
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Those are 2T2R (mimo) they NEED both antennas to make FULL use of BANDWIDTH sensitivity is better on the 841 (need less gain and power).... Link budget calculates at least 18 dbi gain needed for 17 18 dbm of power and -68dbm sensitivity...
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Line of SIGHT or OBSTACLES , if so , what kind of obstacles , Height you could use , mastil tower... Radio types (router extender power , sensibility) THEN and only then , you know how much gain you'll need...imho
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Jomy try making it a LFA , doing an HORIZONTAL folded dipole , you can make it 50 ohms by that change and dimensions , the rest stays the same (director reflectors)