Richard,
When it comes to looking up books for quotations
you do a good enough job to be a librarian, but I am unaware
of any instance where a librarian was promoted to the engineering
section on a project basis. Each of the instances that you quote
are simple and direct..... as long as particular conditions are
followed.
When you strayed from your books to combine two situations it would
be wise for you to analyse the new situation to check for changes
in conditions. Unfortuately for you this will not be neatly laid out
in your books
In the case of a so called magnetic loop there are many conditions
to be met to ensure a figure 8 radiation pattern, with or without
deep nulls.
Thus just any old loop in any sort of conditions such as being
coupled to another object or not uniform in cross section e.t.c.
is not the same as the conditions that you referenced in the
handbook thus statements that regurgitate may well not now apply.
It is a pity that you do not have a interest in computor programs
or an interest in using one because if you did you could add to
your experience without the need of buying another book.



(Richard Harrison) wrote in message ...
Art Unwin wrote:
"As far as I am concerned you do not have the faintest idea what my
antenna consists of ...or,,you don`t know what you are talking about."

How does Art`s antenna differ from Fig 10(A) on page 26-9 of the 19th
edition of the ARRL Antenna Book?. In that figure, the input of the "T"
is inductive until the series capacitance brings it into resonance.

The tuning section of Fig 10(A) forms a small loop. See Fig 4 on page
5-3 of the same Antenna Book for the small loop radiation pattern. Also,
see Fig 12 on page 2-8 for the dipole radiation pattern. Note that lobes
are perpendicular to the wire and plane of the dipole, and perpendicular
to the axis of the small loop. There are nulls perpendicular to the wire
and plane of the loop.

The loop`s null can`t help the dipole`s lobe. It can`t hurt it either,
other than by radiating some energy that might otherwise have gone into
the dipole. As the loop is small ( 0.1 lambda is one definition), its
contribution to radiation may be small. As the loop size grows, so will
its radiation, and its null will decline.

How does Art`s antenna differ from a T-matched dipole?

Best regards, Richard Harrison, KB5WZI