Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old January 19th 05, 06:49 AM
Keith Coleman
 
Posts: n/a
Default Scantenna (directional or omnidirectional)

Hi all,

Any of you that has much more knowledge and experince than myself, can you
help?

I know that the scantenna is sold as a omnidirectional antenna, I can't help
but think that by the design, there is some directionality to this antenna.

Is this the case? Can someone offer any of their experience to this thought.

Cheers,
Keith


  #2   Report Post  
Old January 20th 05, 12:15 AM
Brian
 
Posts: n/a
Default

On Wed, 19 Jan 2005 05:49:53 GMT, "Keith Coleman"
wrote:
it a omni
what makes you think its directional?

Hi all,

Any of you that has much more knowledge and experince than myself, can you
help?

I know that the scantenna is sold as a omnidirectional antenna, I can't help
but think that by the design, there is some directionality to this antenna.

Is this the case? Can someone offer any of their experience to this thought.

Cheers,
Keith


  #3   Report Post  
Old January 20th 05, 04:19 AM
Colic
 
Posts: n/a
Default

The UHF or higher elements of the Scantenna are mounted on the boom beside
the main element. The distance from the main element to the short higher
frequency element is about half of the length of this short element,, or
about 0.25 wavelength for the center frequency of the short element.
Optimal first reflector spacing on a beam is from 0.1 to 0.35 wavelength,
depending on other factors. This means that the main element may well serve
as a reflector for the short element, possibly fairly ineffecient because it
is very much to large, but it should still serve. This would give some
directionality "down" the boom, from the main to the short element.

C!

"Brian" wrote in message
...
On Wed, 19 Jan 2005 05:49:53 GMT, "Keith Coleman"
wrote:
it a omni
what makes you think its directional?

Hi all,

Any of you that has much more knowledge and experince than myself, can you
help?

I know that the scantenna is sold as a omnidirectional antenna, I can't
help
but think that by the design, there is some directionality to this
antenna.

Is this the case? Can someone offer any of their experience to this
thought.

Cheers,
Keith



  #4   Report Post  
Old January 22nd 05, 02:24 AM
debaskett
 
Posts: n/a
Default

Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
discone or scantenna? redrum Antenna 8 January 13th 05 12:42 AM
Is there such a thing as "Best Omnidirectional FM antenna"? Linux Lover Antenna 8 October 28th 04 08:47 PM
Scantenna questions Tempest Scanner 6 September 30th 04 10:07 AM
WTB: Johnson Viking Directional Coupler for KW Matchbox LJ Boatanchors 0 July 5th 04 01:05 AM
Scantenna on 40-50 mhz RC Scanner 3 October 19th 03 02:57 PM


All times are GMT +1. The time now is 05:16 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017