Antenna with wire elements

[Admin 2421]

The biquad antenna is center fed and symmetric about its origin...!!!

[clanon 215]

On 8/11/2016 at 7:09 PM, Admin said:

Amos Inverted Antenna

InvAmos5

 

I did built it...It's amazing...APs keep poping up...and isn't critical to point it...My Best antenna so far...(Adapted an minipci wlan card to it) it digs up more Routers than my wn722n...

[aurel 22]

Hi

How to connect 4 zigZag elements 

i have crazy idea!

Is there image of feed point conections for alredy made 4 zigzag with 4 elements ?

thanks

 

[Charlesopisp 0]

What Mike said.

To achieve the same inductance with a LOT more wire requires wider spacing.

Then why not just use a small cylinder coil?
capture area because the loop is not just the inductor but also the antenna.

73
kb0lxy

[Admin 2421]

On 9/2/2019 at 11:12 PM, Charlesopisp said:

What Mike said.

To achieve the same inductance with a LOT more wire requires wider spacing.

Then why not just use a small cylinder coil?
capture area because the loop is not just the inductor but also the antenna.

73
kb0lxy

,,,,, who is Mike ... ???

 

[Admin 2421]

,,,for this antenna...

fig1a-side rhombus1 = 0.25 * lambda
fig1b-side rhombus1 = 0.25 * lambda
        -side rhombus 2 = 0.5 * lambda
fig1c-side rhombus 2 = 0.5 * lambda

,,,it would seem that a diminished form would be so....

(this is my idea...!!!!)

,,,for fig1c, it must be tried this...!!!

 

[Hamza 43]

On 08/03/2019 at 2:04 AM, clanon said:

I did built it...It's amazing...APs keep poping up...and isn't critical to point it...My Best antenna so far...(Adapted an minipci wlan card to it) it digs up more Routers than my wn722n...

Wich type of balun  for this antenna!?

[clanon 215]

3 hours ago, Hamza said:

Wich type of balun  for this antenna!?

4:1 (four 200 ohms to 1 50 ohms)

PS: Fundamental to get right the coaxial Velocity factor Coaxial length...(polyurethane , polyethilene dielectric )

THIS ONE NOT the former link

https://www.qsl.net/yu1aw/ANT_VHF/Amos_Ant/InvAmosArray.pdf

[Hamza 43]

Thank you sir .merci

 

[Hamza 43]

On 07/08/2020 at 1:10 PM, Hamza said:

Wich type of balun  for this antenna!?

So no need to shorten the  coax to the reflecter with this balun?

On 07/08/2020 at 3:52 PM, clanon said:

4:1 (four 200 ohms to 1 50 ohms)

PS: Fundamental to get right the coaxial Velocity factor Coaxial length...(polyurethane , polyethilene dielectric )

THIS ONE NOT the former link

https://www.qsl.net//ANT_VHF/Amos_Ant/InvAmosArray.pdfso

[clanon 215]

14 hours ago, Hamza said:

So no need to shorten the  coax to the reflecter with this balun?

i think it was 41 mm with PE insulator...

The GOO is silicone insulation...(if i build it agai i WOULDN'T put it...you know losses)

Edited August 9, 2020 by clanon

[Hamza 43]

On 08/11/2016 at 11:09 PM, Admin said:

Amos Inverted Antenna

InvAmos5

 

in other sites  antenna array  inverted amos 5   A is different 33mm??!

[Hamza 43]

https://www.qsl.net/yu1aw/ANT_VHF/Amos_Ant/InvAmosArray.pdf

[clanon 215]

most critical is parallel feed line (9 to 10mm depending on wire diameter) thicker wire bigger distances...i used 1.5mm and it works like a CHARM ,

distance to reflector is NOT that critical (it's a very forgiving antenna) around 3 cm...

less distance MORE GAIN and VSWR

More distance LOWER gain and vswr

BALUN is MOST CRITICAL

USE the MINIMUN possible ISOLATORS Polystyrene foam (styrofoam low density could be used to replace insulators)

 

Edited August 12, 2020 by clanon

[Hamza 43]

Thanks  clanon....what if I use  lambda /4  balun  it's easy and  make the antenna more solid ( stronger ). Becuz this antenna looks so fragile  and.  I m asking if I have to shorten the coax cable to reflecter if I make 4:1 balun ?

[clanon 215]

it NEEDs to be

4 (200ohms twin feed line Z)

to

1 (50ohms cable and radio)

CAN'T use a 1:1 like on dipole...

It is just a piece of coax with 2 solder points (lead)...and the shields alltogether (3)

Edited August 14, 2020 by clanon

[Hamza 43]

I  had read that lambda/4  bazouka balun it's possible too ( 31 mm )   and if I use strong thick support (isolater )  fixed with screw and adjustable distance  ?  It's miss the performance?;

[clanon 215]

That's 1:1 balun  ...NO IMPEDANCE transformation AFAIK...you need a 4:1

[clanon 215]

What coax are you gonna use...RG...

 

[Hamza 43]

3 hours ago, clanon said:

What coax are you gonna use...RG...

 

I think Rg 59  it's available for now    51mm balun

5 hours ago, Hamza said:

I  had read that lambda/4  bazouka balun it's possible too ( 31 mm )   and if I use strong thick support (isolater )  fixed with screw and adjustable distance  ?  It's miss the performance?;

 

[clanon 215]

75ohms/50ohms= 1.5 VSWR +

200ohms/50ohms= 4 VSWR...

[Hamza 43]

On 09/08/2020 at 3:53 PM, clanon said:

i think it was 41 mm with PE insulator...

The GOO is silicone insulation...(if i build it agai i WOULDN'T put it...you know losses)

silicne is  so week and  cannot  resist  to hot temperature  it will melt  and lose its lenght..... i willing to make  strong antenna 

[Admin 2421]

Another form of copper wire antenna...by Mul_ono Chanel on YouTube

[Hamza 43]

On 26/10/2020 at 11:09 AM, Admin said:

Another form of copper wire antenna...

great   easy to make  does it need balan ???

[Admin 2421]

,, no, no balloon is needed for the 2442 MHz frequency...!!!