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bejonet

biquad antenna digital TV

i have made biquad antenna for TV, reference at biquad calculator, frequensi from 470-800Mhz and place in indoor it is working good but not really good, 

a question is, there are way to tunning this antenna for best result..

IMG20181207132724.jpg

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,,, for a biquad with a band so wide I think a director should be attached
,,,with reflector and the thicker copper wire ..

IMG_3847 copi.jpg

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ok,, how to connect director and what material using between director and wire.

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,,,the director must be attached to an insulator...!!1

I will make such an antenna

IMG20181207132724.jpg.5434fd709b8f8bcfc2d3a3fc8c92c334.jpg

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I have two variants, which you prefer ... ??

screenshot_6573.jpg

screenshot_6572.jpg

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10 hours ago, Admin said:

 

screenshot_6572.jpg

this one, please,,,

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,,,,good, I do not know if that's what you're happy with ...

uve635mhz_01.jpg

uve635mhz_02.jpg

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thanks, but not as I expected, digital tv (maybe 5-6) works at a frequency of 400-500 and most tv broadcasts are in the frequency of 470-799mhz.


that means for fbiquad antenna it is not possible to work at 400-800 frequencies?

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39 minutes ago, bejonet said:

thanks, but not as I expected, digital tv (maybe 5-6) works at a frequency of 400-500 and most tv broadcasts are in the frequency of 470-799mhz.


that means for fbiquad antenna it is not possible to work at 400-800 frequencies?

,,,not...!!!

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3 hours ago, Admin said:

,,,,good, I do not know if that's what you're happy with ...

uve635mhz_01.jpg

uve635mhz_02.jpg

ok, I will try this antenna, can you give me  a detail please,,,

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,,, I think it's a better option...0,5...0,7GHz(200MHz bandwidth)

95.jpg

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18 hours ago, Admin said:

,,, I think it's a better option...0,5...0,7GHz(200MHz bandwidth)

dimension and material for this antenna please,,,

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That's what you ask me...!!!
Material = Aluminum #4mm

Isolated Spacer= plexiglass 20x25,5x40mm

uve635mhz_01.jpg

uve635mhz_02.jpg

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use galvani sheet 4mm, how to connect the coax cable, i dont have flux for solder galvanis or maybe use bolt and nut, and pixelglass replaced with styrofoam it would be?

IMG_20181216_153808.jpg

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22 minutes ago, bejonet said:

use galvani sheet 4mm, how to connect the coax cable, i dont have flux for solder galvanis or maybe use bolt and nut, and pixelglass replaced with styrofoam it would be?

 

,,,good...!!!!

,,,yes, it is possible...!!!

413.jpg

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antenna test without reflector

i get 3 digital tv broadcast (same as biquad i use before)

17 analog tv broadcast, but more clear picture than my old wire biquad, some bad signal  for uhf 22-28 and uhf 52-60,

maybe there are another option for 300mhz bandwith? Thanks,,

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7 minutes ago, Admin said:

,,,missing director and reflector....!!!

No,,,, use director but without reflektor. 

Without director is it not working, maybe tomorrow i  try attach the reflector

Edited by bejonet

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Correction, i use 0.4mm galvanis sheet not 4mm

and today i adding reflector, indoor place, get 21 tv channel 19 clear picture. Thank,s admin...

IMG_20181217_120053.jpg

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Well, congratulations,,, !!!

,,,but with the antenna of the wire how many TV stations did you catch....???

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