Well the Laws of Physics dont change however much
one might wish it :-))
The unipole will be approx -3dB ERP on the inv
Effective height of unipole approx half physical
Effective height of inv L same height with 1.5*h
top is approx 0.9* physical height
inv L disadvantage.....requires another support and
inv L advantage ........over poor ground with the
same feed-point grounding the inL will have lower ground loss and higher
capacity. Over good ground or sea-water this advantage may disappear, but losses
will be low anyway.
I think this folded monopole is covered in Rik's
tutorial, the extra wires are just "matching" they dont increase the radiation
resistance. Commercial stations like grounded aerials for lightning
----- Original Message -----
Sent: Friday, May 08, 2015 4:54 PM
Subject: LF: UNIPOLE V INV-L ?
UNI-POLE V INV-L ?
Assuming a robust ATU and earth
What would be the advantage / disadvantage
of say a 40 foot uni-pole
, to a conventional 40 x
60 ft inv L at MF ?
tower and side wire or RG8U /
copper pipe construction ? ......... -3 dB of a
similar size loop ?