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clanon
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Posts posted by clanon
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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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Up to 9 dBi gain between 1710 and 2700 MHz, and 6 dBi gain between 600 MHz and 900 MHz.
+/- 45 degreee cross-polarization.
https://www.youtube.com/watch?v=vm4hV1ITrp0
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SQUARE works too (aluminum plate RIVETED)...leave at least 1 cm to dipole borders...(my GUESS)
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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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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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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!
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learn that...(the hard way)
in Antennas for mobile communications
Posted
i catched Mikrotik stealing BUT developing over the theft here