[Antennaware] EZNEC Modelling

[Eugene Skopal]

Cebik has an excellent article on how to model a matching network at:

http://www.cebik.com/amod/amod73.html

..Eugene..
AE2F

-----Original Message-----
From: antennaware-bounces at contesting.com
[mailto:antennaware-bounces at contesting.com] On Behalf Of David Gould
Sent: Monday, November 20, 2006 11:27 AM
To: antennaware at contesting.com
Subject: [Antennaware] EZNEC Modelling


I have been doing some basic modelling of vertical antennas using 
EZNEC for a while but have not paid much attention to the impact the 
L-match has on the system (particularly losses in the coil) and would 
like to refine my approach.  I was thinking of doing the following.

I use an L-match with a coil going from the bottom of the antenna to 
ground and a series capacitor from the bottom of the antenna (top of 
coil) to the 50ohm input.

First I model the basic antenna and get the source impedance and 
determine the L-match components

I was thinking of putting a short 1-segment wire from the bottom of 
the antenna to ground and putting the inductor on this element. Then adding
another short 1-segment wire from the bottom of the 
antenna (top of coil) at right angles to the antenna and putting the 
series capacitor and the source on this wire.

Are there any flaws in this approach or a better way of doing it?

73,
Dave, G3UEG

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