On Tue, 14 May 2002, Michael Luvara wrote:

>As for antenna orientation, design, they are all good for different
>things. Take a look at the aarl handbook as suggested by another list
>member. The linx technology app note is good too for starters.  Coils,
>loops, etc run into certain constraints, like matching, etc. Most of the
>time these layouts are used for space reasons, and can give lesser
>results than a simple monopole.

Why ? I thought the maximum possible gain of any antenna is related to its
size vs. lambda. when viewed from the corresponding station. A simple
monopole needs more careful matching and tuning than a dipole, and an
eggbeater or discone antenna will probably outclass these two in all
respects for the same lambda-related size, for example because it will
leave no nulls in the horizontal or vertical plane.

A simple lambda/4 whip has only one advantage: simplicity. A vertical 5/4
lambda will outclass it and give significantly more horizontal gain (and
still require base tuning but less exact).

For the 'lot' of matching amateurs can achieve at 433 and 900MHz a
lambda/4 whip probably costs them 6dB in transmitted power (30%
less possible range). This is just my limited experience.

A oriented dipole

Peter

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