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clanon
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Everything posted by clanon
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HUMIDITY and MOISTURE inside COAXIAL cable could be a problem...there. over time. a layer of some insulation or cover all in thin PET (nylon) dielectric paint could be better... Cable changes inside due to WATER and you lose SIGNAL
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DISTANCE to REFLECTOR must be TAILORED to local needs...(FR4 quality . reflector enclosure sizes and shapes) but it's on ballpark...i think
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focus point is important (distance to reflector) some mm make a huge difference... did you try with antenna (reflector ) at 90 degrees...VERTICAL...?
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i catched Mikrotik stealing BUT developing over the theft here
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easier to STEAL than develop-invent... nice bandwidth... could it be SHIFTED to 1 ghz (LTE)...? Who needs 3,5ghz...
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That TRENDNET is easier to build and simulate... wouldn't be GREAT to develop an ARRAY bi-band using dipoles...? (15 or more dbi)
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Couldn't find any...(searching , i'm trying) Working on IMPEDANCE adapting...
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SQUARE works too (aluminum plate RIVETED)...leave at least 1 cm to dipole borders...(my GUESS)
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The DIAMETER of the container ...is too small (dipoles are leaning-contact with container) apparently...(Which would give a jumping signal as it is seen , high and low swr , s11, impedance and changing diagram of radiation)
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700mm the one i'm working on...i'll tell you if it works all 8 mm tubes and double flat strip 15x2mm folded dipole and balun included (just put the cable tv in the antenna STRAIGHT)
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is a great design you can USE the length you want , taking directors OUT from the TIP back (reducing GAIN) the BALUN losses and bandwidth is of most importance
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VOVA it was ALREADY MADE by YURI
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so far i'm using Boom 15x15 square (1mm) tubing 8mm (1mm thick) DIPOLE 15 x 2 mm 12dbi could be achieve with 7 + 3 elements BANDWIDTH is the hard thing to achieve (More than 50mhz)
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This channels ? more or less...KANALs ...? if only TWO channels we need TWO dipoles if ALL channels only one dipole
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it promise more than 10 dbi (still working on it)
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How many elements...GAIN...? do you need and WHICH KANAL ? what tubes do you have?
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from 690 to 770 you could use a NORMAL tube dipole NOT FOLDED but TUNING the TUBE's diameter
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BALUN 1:1 if 50 ohms...needed (otherwise rf runs trough coax shield and resonance effects occur over cable shield) Pawsey stub (3cms) INNER CONDUCTOR NOT CONNECTED! QUARTER WAVE to FR center
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mobe pics to https://www.wifi-antennas.com/topic/1762-no-name-antenna-27-dbi/?page=2...i think
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GREAT WORK JOMY!