"Frank Gilliland" wrote in message
...
Forget about all that antenna-modeling software crap and build a
simple field-strength meter. Then go measure it yourself because
that's how it's done in the real world,

Have you personaly done so for the setup in question?

and that's how the page at
Landshark's link came up with the radiation pattern for the
bumper-mount antenna. A similar pattern can be found in almost any
radio-communications handbook that covers mobile antennas.

The antenna simulation software shows the same thing as single bumper mount
antenna pattern as on the page Landshark posted. That's why I question the
omni pattern for a dual antenna setup. In fact Frank you can look up the
pattern for such a setup, dual antenna, in a copy of the radio engineer's
handbook, and I'm surprised you haven't since you know about it. More than
one Ham has modeled some commercially manufactured antennas and discovered
they don't perform as the ads suggest. When the manufacture was confronted
with the results they modified their claims. The software modeling approach
works or people wouldn't waste their time with it. In fact more antenna
manufactures are doing it since it saves a lot of screwing around making
error prone measurements with a field strength meter, and that's how they
are doing it now in the real world.


--
Leland C. Scott
KC8LDO

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