[TowerTalk] Effect of ground radials

Marsh Stewart marsh at ka5m.net
Thu Jan 23 14:32:41 EST 2014

What antenna modeling software are you using? NEC-2 used in EZNEC 5 will not
model buried radials. Radials very close to ground, as close as 6" on 160M,
can be modeled. There is an excellent chapter in the 22nd edition of the
ARRL Antenna Book on Antenna Modeling that covers this. 

Marsh, KA5M

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
john at kk9a.com
Sent: Thursday, January 23, 2014 11:44 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Effect of ground radials

This is the first time I got zero response on towertalk, so I will try to
rephrase my question.  We all know that having a good ground system on a
vertical reduces ground loss.  What effect, if any, do 1/4 wl buried
ground radials have on the pattern and radiation angle?  I normally model
only the vertical portion of a vertical antenna and use the average ground
setting, unless it happens to be on the beach. Can ground buried radials
be modeled?

John KK9A

---------------------------- Original Message ----------------------------
Subject: Vertical Modeling
From:    john at kk9a.com
Date:    Tue, January 21, 2014 2:41 pm
To:      towertalk at contesting.com

What is the proper way to model buried ground radials of a vertical antenna.


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