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clanon
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Everything posted by clanon
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4:1 (four 200 ohms to 1 50 ohms) PS: Fundamental to get right the coaxial Velocity factor Coaxial length...(polyurethane , polyethilene dielectric ) THIS ONE NOT the former link https://www.qsl.net/yu1aw/ANT_VHF/Amos_Ant/InvAmosArray.pdf
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This is with a TP LINK kinda of dipole on 1.26 regular parabolic dish...0.2 or so F/d ratio...(hard to feed) https://www.wifi-antennas.com/uploads/monthly_2020_07/5f05b71ad1d7f_126m.JPG.3d12cb9d42e94a87de9f02d81677a212.JPG i like the VE4MA and chaparral feeds for Efficiency...but still collating...not sure (big area both...)
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you may wanna study feeds efficiency (spillover ,etc) for you desired Dishes...anything close to 70%or more would be GREAT for your project...(over 20dbi gain should be enough , if there are NO LOSSES (dielectrics , cables , connector , mismatch ,etc) and if it is only BLUETOOTH ,,,you may use high Q factor centered on your band,,,NO need for wide Bandwidth...there
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...17dbi...? more like 14 in my book... (PS:Jomy , what Material is it FR4...?)
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only 8dbm (6mw) you might wanna stay AWAY from any DIELECTRIC...(efficiency would be lost ) power would be lost
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What are the SUBSTRATE , dielectric constant...and loss...? (Rogers...?) which one...?
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"sketchy" signal is instability (poor SWR, Gain-Sensibility ,Losses ) all fixable with the RIGHT ANTENNA and wiring .Maybe using the same hardware you have now...i find out that different RF hardware respond different to same antennas But first of all you need to find the weakness on your chain A 24dbi GRID and or an offset parabolic could do miracles in RANGE
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https://pureadmin.qub.ac.uk/ws/portalfiles/portal/161046293/High_Performance_Balun_for_a_Dual_Polarized_Dipole_Antenna_FINAL_.pdf
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Isolation for DIPOLES at 90 degrees should be high...(because of the radiation diagram) Baluns seem complicated without a BETTER picture FR4 losses are HIGH... it should be possible to make it in METAL over PES FOAM(low density)...HIGHER EFFICIENCY
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if you already have the cuts (VACUUM cuts) insert 'em in the metal (delete the vacuum solids )and SEPARATE SHAPE...(it should give you the individual parts that were BOOLEAN ADDed before)
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You won't isolate by tweaking ONLY the feed point...the WHOLE electromagnetic diagram must be consider (All irradiating elements and surfaces)(for ISOLATION that is) SIMPLY put...: TWO COMPLETELY SEPARATE ANTENNAS are better (for ISOLATION of Ports) than two in the same cavity or close to each other...ALWAYS
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30 mm to reflector (Aprox) PETRA OK.cst PETRA .dxf
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Nope it's a 2,4ghz...https://openwrt.org/inbox/toh/totolink_n300rt
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Losses on FR4 at 5.8...? Efficiency...? dunno
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9,5 DBI average from 1.7 to 2,6...
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is it possible , Jomy ,...that it has TWO resonances ?...and that they are at 1.8 and 2.4 ghz...does it makes sense...?
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How close am i...? don't know much about LTE range... but i really like the SMOOTHNESS of this one...
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You're RIGHT , my bad...Theoretically YAGIs only need 1 DIRECTOR or 1 REFLECTOR to be IT!... (PS:Just Semantics i guess)
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https://drive.google.com/file/d/1YUtCtA57I8AyKA4WGt4QRwAIShzAoUJn/view