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Biquad Antenna

307 posts in this topic

 What's so complicated to build it,,,??

A picture of a thousand words...!!!

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On 5/28/2017 at 0:17 AM, toobefree said:

what are you getting 16.4dbi from?

can you post the CST files for this?

how is the cable connection made?

 

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On 6/21/2017 at 2:19 PM, toobefree said:

how is the cable connection made?

 

This should be the connection with 50 ohm coaxial cable

6b.jpg

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Depending on the type of coaxial cable, the length is calculated.

For the sketch that I made, the coaxial cable used has the velocity factor=0,83

rg 402  has a velocity factor=0.74

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,,,biquad on PCB with parasitic director

 

 

18.jpg

19.jpg

24.jpg

27.jpg

28.jpg

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Biquad antenna in the air with parasitic director-it is necessary a laser cutting of the vibrator element (biquad patch)

 

screenshot_4580.jpg

screenshot_4581.jpg

screenshot_4583.jpg

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On 14.06.2017 at 1:36 PM, Admin said:

65.jpg

On 14.06.2017 at 7:43 AM, Admin said:

try this...

48.jpg

Hi. 
As you can see. Found this forum very useful. 
Here's my try. Used 1mm fr4 (tu be true it was 1.1) for both PCB's. 
Cable that i've used is RG402.

Measured, and that design resonates over 6gh. I think it happens cos you simulated design with nylon spacers. 
Here it's my try...

IMG_20170922_163738.jpg

IMG_20170922_163819.jpg

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3 hours ago, antenna_kid said:

Can I ask you for same design but for 1200Mhz ? Please :)

,,, for 1200MHz,don"t you think that the antenna is too big, about 4,8 times...???

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4 hours ago, antenna_kid said:

Hi. 
As you can see. Found this forum very useful. 
Here's my try. Used 1mm fr4 (tu be true it was 1.1) for both PCB's. 
Cable that i've used is RG402.

Measured, and that design resonates over 6gh. I think it happens cos you simulated design with nylon spacers. 
Here it's my try...

 

 

What dimensions did you use for FR4 thick 1mm ,,, ???

I have not posted such dimensions....!!!

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No you not :) you posted biquad2.igs file :)
As you see i've cut that biquad on CNC. I have small one so it was easy.

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36 minutes ago, antenna_kid said:

No you not :) you posted biquad2.igs file :)
As you see i've cut that biquad on CNC. I have small one so it was easy.

But biquad2.igs file is for 1.5mm FR4 thickness,,,,!!!!!

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oh, it was under dimensions that you posted for 1mm (under picture). If so, my bad :)
But no problem with that, I've try make some case so it will shift antenna down :)

 

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7 minutes ago, antenna_kid said:

oh, it was under dimensions that you posted for 1mm (under picture). If so, my bad :)
But no problem with that, I've try make some case so it will shift antenna down :)

 

then multiplies the dimensions of the image with k = 1,0345 for the frequency of 5,8ghz

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On 1/16/2017 at 10:36 PM, Admin said:

,,,a biquad antenna on PCB(10,5dBi) and panel antenna with 4biquad(16.5dBi)...

 

55.jpg

50.jpg

 

The Best ....!!!

 

 

screenshot_3395.jpg

92.JPG

send .cdr file please

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Hello.. Im newbie in cst, i wanna make a biquad antenna for my final project. Can anyone tell me the detail about how to make port for biquad wire antenna in cst? Or give some tutorial? Ive made the antenna with coaxial probe but there is radiated wave from the coaxial probe.. i dont understad, am i wrong or not.  Thank you very much. :)

Edited by Luthfi Gibrani

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