Welcome to WIFI Antennas

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Sign in to follow this  
Followers 0
rob

yagi 2.4Ghz yagi

30 posts in this topic

I recently copied this antenna design from the internet and although I'm pleased with its performance, i have my doubts about the original configuration so i have made a change to the driven element.

The driven element on the original design appears to be coupled to the rest of the elements - surely this creates a short  circuit? so what i have done is isolated the driven element from the boom.

what do you think?

cheers.

 

2.4 yagi.jpg

Share this post


Link to post
Share on other sites

In the design of the antenna there is a closed connection of the elements, it should not deviate from this, since this changes the parameters of the antenna.

Share this post


Link to post
Share on other sites

His garry,  thanks for your advice it's appreciated. 

The reason I deviated away from the original design was due to watching a YouTube video by Andrew Mc Neil, it was he who suggested this approach. 

Cheers 

Share this post


Link to post
Share on other sites

Okay, that's better...

57.thumb.jpg.70c1293f415dcbd3b83cc33a828c7a02.jpg

garbeala_01.jpg.2b64fc9c1b9b20b596e6683d402ff8ef.jpg

 

"you do not watch all the forum...!!

1 person likes this

Share this post


Link to post
Share on other sites

Hello admin, obviously not.

I've been searching the forum but not deep enough.

I have now reconstructed my antenna to the original design.

Thank you for the link

1 person likes this

Share this post


Link to post
Share on other sites

Rob, please, if you can, post YouTube video by Andrew Mc Neil and the sizes of your antenna!!

1 person likes this

Share this post


Link to post
Share on other sites

Hi admin, I'll post my antenna measurements later on.

 

1 person likes this

Share this post


Link to post
Share on other sites

Admin, this is the design I have followed.

The measurements are the same apart from the boom which is 6mm dia, and I haven't included the 83mm lipped rear reflector.

Cheers 

 

Screenshot_20180330-191223.png

Share this post


Link to post
Share on other sites

Here's my completed antenna coupled  to my new toy!

 

 

20180428_184727.jpg

20180428_184914.jpg

Edited by rob

Share this post


Link to post
Share on other sites

Yes it's good, but why 2.6GHz...!!??

This is the execution drawing...???

path.jpg

Share this post


Link to post
Share on other sites

Hi Admin,  yes thats the design, however I omitted the 15mm lip from around the reflector.

I'm happy with the vswr at 2.414 ghz as that's where I want to be.

The 2.6Ghz reference shown is just how I set up the analyzer stop point.

I did however try to re tune to the lowest dip point to 2.414 but had no luck.

I guess I need to move the driven element closer to the reflector to achieve this?

 

Share this post


Link to post
Share on other sites

Good design and it appears to work well.

How does one tune this type of antenna?

 

Share this post


Link to post
Share on other sites

 ,,,, these might be the best sizes, I do not know, it should be tried....

191.JPG

Share this post


Link to post
Share on other sites

Impedance adaptation still needs to be done...

rob_01.jpg

rob_02.jpg

rob_03.jpg

rob_04.jpg

Share this post


Link to post
Share on other sites

Yes ,this is it...!!!


 

99.jpg

191.JPG

3 people like this

Share this post


Link to post
Share on other sites

This is the original antenna...

BDM_4.JPG

bester_oblushatel.jpg

1 person likes this

Share this post


Link to post
Share on other sites

But anyway, Ivan is smart .. !!!

anigif.gif

1 person likes this

Share this post


Link to post
Share on other sites

Increasing the gain in directivity of the antenna...

592.jpg

image (2).jpg

1 person likes this

Share this post


Link to post
Share on other sites

This antenna with circular polarization? Left or right?

Share this post


Link to post
Share on other sites
23 minutes ago, garry said:

This antenna with circular polarization? Left or right?

RHCP

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0