Antenna with wire elements

[clanon 246]

1:1

50ohms to 50 ohms...

The antenna is BALANCED ...

(imho)

Edited October 27, 2020 by clanon

[sdasda 0]

Hey, I have stupid question about the wire antennas and specially for the invamos5 measurements. 

After the bending you get the right measurement at the inside, outside or in the center of the wire diameter? Fx 'E'

Cu=2mm

[clanon 246]

MOST of the times it is at the CENTER of the wire (for all cases)

it's a terrific antenna...i used 1.5mm...balun is of the utmost importance.

 feeding line (parallel horizontal lines) distance TOO

or ask the designer is a good guy replies everything ddobricic@gmail.com

Edited April 1, 2021 by clanon

[Admin 2545]

Hentenna 2,1 GHz

The original Hentenna as a special kind of a single loop was described first in the 1970ies by Japanese Hams, an English article by JF6DEA/KE1EO about the Antenna ("The Hentenna – The Japanese 'Miracle' Wire")  was in the QST 1982 and in the ARRL-Antenna- Compendium, Vol. 5. The basic function of the  Hentenna structure is the 1,50-λ-Extended-Quad. This antenna with the figure of an "Oblong" has a gain of 3,6 dBd, but a feedpoint impedance of 73 + j 470 Ω.

The Hentenna has nearly the same gain, but a clever feeding with an impedance at XX of 50-70  +/- j 0 Ω .

 

https://www.qsl.net/dk7zb/Quadlong/Hentenna.htm

[Harry36 140]

[Admin 2545]

Harry36,try to put the pictures to be seen..!!!

[clanon 246]

2 hours ago, Admin said:

Harry36,try to put the pictures to be seen..!!!

https://www.rlocman.ru/shem/schematics.html?di=30999

Edited August 30, 2021 by clanon

[fdag2 1]

Hello there, I am building the InvAmos5 with the new dimensions from the papers.

Dimensions of antenna array
Due to inserting a two-wire phasing line it is necessary to change some of the original
dimensions of single Inverted Amos-5 antenna and introduce the new ones.
Here are given all dimensions of antenna both in millimeters and in wavelengths:
mm wavelengths
A 33 0.27
B 61 0.50
C 61 0.50
D 21.5 0.176
E 21 0.172
F 10.8 0.0885
G 32.5 0.264 (from refl. surface to dipole wire axis)
X 102.5 0.840
dw 2 0.0164 (dipole elements copper wire diameter)
Overall copper wire length: 8 x 282 mm or 8 x 2.3 wavelengths
Reflector solid metal sheet surface: 492 x 369 mm or 4 x 3 wavelengths

 

so if F=10.8mm what about the feeding point ? do I need to shorten the distance there and if I do what will be ?

and also I haven't done any balun's til now so what will be the length if I use RG58  50ohm.

IMAGE_201.thumb.jpg.xcf

[WEAZY 1]

[WEAZY 1]

[WEAZY 1]

[Admin 2545]

,,,good work WEAZY...!!!

[WEAZY 1]

5 minutes ago, Admin said:

,,,good work WEAZY...!!!

Thx. can u give me ideas for do sometning, i wanna make FA20 or something strong gain...

[Admin 2545]

,,,maybe FA20 with more patches..!!!

[WEAZY 1]

51 minutes ago, Admin said:

,,,maybe FA20 with more patches..!!!

ANY omnidirectional ANTENNAS WITH 14+ Db GAIN?

 

[Admin 2545]

,,,maybe only this...

[WEAZY 1]

11 hours ago, Admin said:

,,,maybe only this...

Yes i know this antenna, but i dont have cooper tubes

May be this? Can u show how much dBi with 12x 8x 6x

 

[Rtyon 1]

What is the range must be of the wire diameter in this picture

 

[Chenobix 1]

I searched through pages of disscussion on many antenna shapes, but cannot find a simple wired omni antena. Is it possible to emulate 15db (1,2m) commercial omni antenna with a single wire ?

[Admin 2545]

,,,something like that with several rings...

[Chenobix 1]

On 8/28/2023 at 7:23 AM, Admin said:

,,,something like that with several rings...

How much sections it needs to have 10dbi or better 15dbi ? Please, can help me with more details and appliable design? ??

Thank you for reply.

15 rigs

[Dr. Pepper 58]

Here in the forum you can find a lot of information. For example look here: 

 

[clanon 246]

Insulators , supports should be on the middle of ANY half wave dipole (ti minimize losses and mismatches)

[clanon 246]

On 28/8/2023 at 6:00 AM, Chenobix said:

How much sections it needs to have 10dbi or better 15dbi ? Please, can help me with more details and appliable design? ??

Thank you for reply.

Without a reflector (Omnidirectional) you'll need 1 meter and some to get close to 15dbi (15-20 half waves) 

 

With reflector you could have 15dbi at under One meter...

Edited September 4, 2023 by clanon

[clanon 246]

On 9/3/2022 at 9:45 AM, fdag2 said:

 

so if F=10.8mm what about the feeding point ? do I need to shorten the distance there and if I do what will be ?

and also I haven't done any balun's til now so what will be the length if I use RG58  50ohm.

IMAGE_201.thumb.jpg.xcf

IT only WORKS witha 4:1 BALUN (200 ohms at feed point BALANCED)

it is a GREAT antenna (i build it and i am USING it right now) over 18 dbi

Balun design