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Antenna with wire elements

43 posts in this topic

The LAZY "H" antenna is a general type of antenna that is in the curtain array family. By placing 2X4 wavelength dipoles in a plane that is at right angles to the direction of maximum radiation and keeping the proper in-phase current condition to each element, you can achieve a HIGH GAIN directional antenna.

 

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The quad antenna consists of a square loop of wire as shown in the figures below . The side of the loop is approximately lambda/4 in length and it is normally fed with 50-- 75*lambda coaxial cable at the point shown. The loop can be mounted with a diagonal vertical and fed at the bottom corner; in either case the feed point is a current maximum and the performance is identical. In the configuration shown, the polarisation is horizontal. If fed from the side of the loop, the polarisation will be vertical.

 

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,,, and how do you make the connection between the spirals .. ??

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because of the limitations of measuring devices, I only use "signal quality" information on the router asus rt-n10u ddwrt.
I call this antenna "capucino" because of its coffee-like shape in a glass.
from the experimental results I made, (C-3) is best in my opinion, that is, in series, the middle connecting point.
because of the complexity of making it, i left the project behind.

IMG_20171206_153730[1].jpg

Edited by pragata.my.id

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"no, no, I want to see how you typed spirals between them ///

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21 minutes ago, pragata.my.id said:

wear the same copper wire.

 

I will simulate such an antenna,,,!!!

 

50.jpg

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length of spiral wire I use 4 x lamda = 4 x 123,86 = 495,44mm.
the distance between the spiral with the reflector is about 35mm.

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diameter wire = 2mm
diameter spiral = 44-46mm

IMG_20171206_163739[1].jpg

Edited by pragata.my.id

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which is correct according to the theory that I can on the internet between the 2 wire is connected, but why in fact, better separated? positive and negative poles.

like this.

IMG_20171206_164758[1].jpg

Edited by pragata.my.id

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6 minutes ago, pragata.my.id said:

wear the same copper wire.

please help me, use whatever construction is up to admin father, to achieve maximum performance of this antenna model, yesterday i only use the same copper wire with spiral.

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4 minutes ago, Admin said:

Anda harus membuat garis adaptasi ...

53.jpg

thank master, for this suggestion. or may also need additional reflectors in front of it?

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