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Author Topic: Micro Vert Antennas  (Read 2231 times)
SP9HZX
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Posts: 41


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« on: December 21, 2012, 03:36:19 PM »

MicroVert antennas

http://dk3red.homepage.t-online.de/en/s6d.htm
http://dl7und.net/eng/Articles/Amateur-Radio/Microverts
http://dl7ahw.bplaced.net/Superantenne00E.htm
http://www.df0lbg.de/Other/dc7tu/AFU/microvert.html


73 Andy
-----------------------
http://www.qsl.net/sp9hzx
http://spearo.republika.pl
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K2DC
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« Reply #1 on: December 22, 2012, 03:28:49 AM »

It's been proven many times that nearly all of the radiation from extremely small antennas is from the feedline, and not from the antenna "radiator" itself.

73,

Don, K2DC
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N8CMQ
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Posts: 373




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« Reply #2 on: December 22, 2012, 04:50:32 PM »

I would rather build a short (6 foot) vertical with a
large capacitance hat and an extensive ground system.
But only if I couldn't have a full size vertical.
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W4OP
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Posts: 436


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« Reply #3 on: December 27, 2012, 07:13:06 AM »

It would appear this falls into the same category as the EH, Tak Tenna, Isotron and now the phased field antenna. As Don wrote- the radiator is the outside shield of the coax.

Dale W4OP
« Last Edit: December 27, 2012, 08:12:19 AM by W4OP » Logged
CE3LLP
Member

Posts: 1




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« Reply #4 on: May 06, 2013, 11:19:54 AM »

It radiate from both (radiator and feed line). In other words, microvert antenna works like a small dipole.
In my case last weekend i just build another microvert wich has an irradiating tube of 38 mm in diameter. The antenna was placed at 8 meters above the ground and now is working like a champ, cause most of my signals are 59 plus and even plus 25 dB. My dipole and end feed antennas gets a high electrical noise on 40 meters.Microvert thanks to his low angle (19°), does not pick up that noise, allow me to listen stations very clear.
In conclusion you can build this antenna and to get a good performance from it, is very important that the antenna get at leats 1/4 lamda or more above ground.

Regards

Nelson
CE3LLP



It's been proven many times that nearly all of the radiation from extremely small antennas is from the feedline, and not from the antenna "radiator" itself.

73,

Don, K2DC

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