When we listen to the radio ?

[mowhoong]

I would greatly appreciate if someone can explain to me the need to
angle the radio antenna at 45 degree for FM and 90 degree for AM or
SW mode. Thank you .

 

[krw@att.bizzzzzzzzzzzz]

On Tue, 2 Aug 2011 17:30:29 -0700 (PDT), mowhoong <mowhoong@hotmail.com>
wrote:

I would greatly appreciate if someone can explain to me the need to
angle the radio antenna at 45 degree for FM and 90 degree for AM or
SW mode. Thank you .

Depends on the (type of) antenna.

A few types with some radiation patterns:
http://en.wikipedia.org/wiki/Dipole_antenna