Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old August 18th 09, 03:40 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 148
Default Underground antenna

On Mon, 17 Aug 2009 18:48:43 GMT, Dennis Whatley wrote:
Just for my personal information, wondering if someone played with buried
or submersed antennas and (especially from 40 meters going lower in
frequency) get some interesting result.


I once read an article in which it was stated that in a simple vertical, the
element current it restricted by the ground current, and any attempt to
increase the ground curent resulted in an increase in efficiency. The
article went on to state that an antenna having maximum contact with the
ground would be the most efficient, and in test a 1/2-wave dipole burried
underground could have an efficiency approaching 98% that of a dummy load.
The advantages are numerouse, such as the lack of an antenna support
structure, but for VHF arrays there could be a huge problem with direction
since the torque required to turn only a 2m 8-ele Yagi would be over a ton.


I read that article, too. 'Twas in an April QST back some years ago.

Jonesy
--
Marvin L Jones | jonz | W3DHJ | linux
38.24N 104.55W | @ config.com | Jonesy | OS/2
* Killfiling google & XXXXbanter.com: jonz.net/ng.htm
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
No See Um Antennas underground antenna Maxwell Smart #99 Antenna 2 July 30th 06 05:40 AM
Underground antennas Tom Holden Shortwave 11 November 1st 05 05:50 PM
Underground Antenna Experiments on 160 meters. Reg Edwards Antenna 30 July 31st 05 01:26 AM
300 ohm underground feedline Steve Beyers Antenna 5 August 12th 04 02:59 AM
ladderline underground?? Jerry Antenna 4 August 20th 03 12:13 PM


All times are GMT +1. The time now is 06:21 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