On Sep 14, 12:23*am, "Sal M. Onella"
wrote:
NOTE: *This is a repost from my sent file. *It didn't appear
20 hours or so after I sent it. *Sorry if it's a dupe to anybody.
---------------------------------------------------------------------"Art Unwin" wrote in message

news:7ce5bd71-d583-433d-88f0-

snip

The navy would not change to a antenna that was not resonant.

Perhaps you are speaking of another country's Navy with which you are
well-acquainted.

Having been intimately involved with US Navy electronics for over 45 years
(active duty 1962 -1982; civilian support in multiple capacities 1982 -
2007) *I can tell you that our Navy has numerous shipboard and
shore-establishment antennas that are not resonant. *Since flexibility in
frequency selection confers a tactical advantage, broadbanding is far more
important. *Tuners and couplers of several designs allow non-resonant
antennas to work well.

The closest the Navy gets to resonant antennas is in some special
fixed-frequency applications, like IFF. *Of course, antennas are sized for
the application and will probably exhibit resonance within their band of
operation, but that's not the design goal.

These were shore based installations probably in Hawaii or some
island.
With respect to resonance, moving away from such as well as changing
from 15 degrees
(Frank's 30 degrees divided by two)
would provide a pattern of distinct advantage which the navy is
constantly looking for
For a whip tipped at an angle of 15 degrees can provide a forward
pattern of gain which can be a big deal
I anticipate that the navy will gyrate towards helical design where
the addition of a magnetic field will give a pattern of choice
together with resonance the size of a shoebox to reduce the number of
antennas on board.
Thanks for the info, it certainly was not silly As an aside the 15
degrees is the same as found empirically by Kraus
in the pitch angle of a helical, another example of the inclusion of
the weak force in a system in equilibrium !