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clanon
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i'll say all Dielectric Boom tube...Polycarbonate (ABS) for sure...
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Integrated LNA amp for Interference finding...All PET PC Boom tube...? Catalogo-Antenne-di-Misura-e-Monitoraggio-Monitoring-Protel-023.pdf
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couldn't find it (was on a catalog) this is similar https://www.protel-antennas.com/files/22-Amplified-portable-antenna-ARK103XZ-PROTEL-HANDHELD-INTERFERENCE-FINDER-GSM-LTE-DCS-UMTS-data-sheet.pdf https://www.protel-antennas.com/protel-ark103xz-amplified-directional-measurement-antenna-band-lte-dcs-umts-1350-2200-mhz.html
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@eco32 you NEED to try CST...is very intuitive and fast...and better results... backfiring CIRCULAR PATCH should have better shape...LOBE
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add a rim and ring...
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PES (Styrofoam) low density...1.075-1.1 Dielectric Constant (almost NO LOSSES)
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http://www.radioamatoripeligni.it/i6ibe/turnhard/turnhard.htm
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i wasn't blaming anyone , just asking for YOUR opinion...
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without 90 degrees phase shift (at half wave center Feed)...two crossed dipoles are NOT Circular Polarized...
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https://www.wifi-antennas.com/topic/2548-catherine-antenna/
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without the delay is only two dipoles one Vertical the other Horizontal (Crossfeeding High Isolation BAD) @Harry36
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Circular pol means : there is 90 degrees delay between feeding points...to force a rotating 1/4 rotation on Each quarter wave (half dipole)...imho built in the reflector (strips)
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Looks like each one receives a different pol- at different timing... Anti-phase it seems LHCP and RHCP...