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Best directional antenna - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.

 Post subject: Best directional antenna
Posted: Tue Dec 28, 2004 3:11 pm 
I'm looking for what the best type of antenna is for high directivity. I'm looking to do a Tx/Rx system with very narrow line-of-sight in ISM900 MHz band, and want to minimize signal power off the beam sight line. Thanks.

- Clyde

 Post subject:
Posted: Mon Jan 10, 2005 1:23 pm 

 Post subject:
Posted: Wed Jul 27, 2005 4:31 pm 

Joined: Wed Jul 27, 2005 3:19 pm
Posts: 2
Try Log-Spiral one.

 Post subject:
Posted: Tue Aug 09, 2005 1:05 pm 
apr wrote:
Try Log-Spiral one.

a planar log spiral is not directional! A conical log-spiral is. However, it'll be broadband and circularly polarized.

If you want linear polarization, a Yagi-Uda antenna is indeed preferrable

 Post subject:
Posted: Tue Aug 09, 2005 1:10 pm 
Agree. This is what I was thinking about. Thank you.

Posted  11/12/2012
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