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clanon
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Everything posted by clanon
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Trevor approach seems the Right on the money! BUT it's using an OFFSET DISH...No SHADOW from feed and different focus F/D ratio spillage etc,
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is goin to be a BIG secondary reflector and Biquads have an almost spherical lobe IIRC (better suited for a DISH )
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Secondary Reflector (small one with similar angle and shape as MAIN reflector) is of MOST IMPORTANCE and antenna should be BACKFIRING (looking back) otherwise you're JUST shielding it from back signals...
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The original "claimed" 11 dbi gain...SMC patch
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http://wifipanelantenna.blogspot.com/2008/12/panel-wifi-antenna.html 1800.cst
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Radome seems THICK 2mm PC (Polycarbonate) Those big BOLTS must have some effect too...
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Phase and Impedance matching( Radiator Z + Feed point z) Yes ALL ANTENNAS are the same ; any conductive material) Dielectric must be CONSIDERED (different ε (epsilon), and Tangent Loss) A HALF WAVE radiator could be held at center point cause there is a Low impedance (high Current) point no EFFECT on general characteristics...(the WAVE is NOT MOVING at THAT specific POINT)
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we SHOULD make a DATABASE and keep it in the cloud with our CSTs and 3D or DXF files , for the interested in trying them...
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not sure manual CALL'em ANT1 ANT2 ANT3 ANT4
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TAMP125 NO IDEA...but nestiam might open the box and SHOW US... the receiver has a lot of netbook antennas inside (no good)
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Ant 1 and 2 are for frequencies from 600 700 and 960 Mhz also Ant3 and 4 are for frequencies ABOVE 1710Mhz Check YOUR frequencies of interest
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What efficiency...? better or worse than FR4 ...did you input the Tangent loss...
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What DIELECTRIC...?
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different video same antenna
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Kerry D. Wong disassembling and test (VNA) Teflon PTFE allows for a very small footprint ,(smallest UWB antenna I know) Not as good as my own LPDA ...but it could be tried on double sided PCB...(still working on it , Needs tweaking) ALL this UWB have great gain beyond 3 ghz...not so much under it and almost NO GAIN close to 500 Mhz...(too small , too SHORT)
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NEEDS refining...yet videopad.exe
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...find one working HERE or anywhere and SCALE DOWN-UP to 3.5ghz that's the easiest way...(You'll NEED the CST or 3d model)
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when looking for Interference between solids , watch closely if you want to TRIM the first one (metal overlapping dielectric) or INSERT the Dielectric into the METAL that overlaps... TRIM or INSERT are the most useful commands before simulation...
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Jomy maybe YOU can post an animation (GIF) of the ENERGY flowing through the driven Disk surface...(to see it turn...)
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the cable position is a NO-NO...imho
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the materials maybe... Material: galvanized iron + powder enamel. (easy to copy and test...)