On Apr 11, 12:49 pm, "Antonio Vernucci" wrote:
I then tried to simulate the hairpin with a proper-length shorted trasmission
line and, doing so, the average gain is almost 0.

Is that shorted transmission line lossless?
--
73, Cecil http://www.w5dxp.com

I presume so. It would seem to me that in EZNEC there is no way of simulating a
lossy transmission line.

73

Tony I0JX

At least in EZNEC 5+, the Transmission Lines window has an entry for
line loss, in dB/100 feet at a frequency you also enter. But the loss
for your 0.8cm diameter aluminum tubing spaced 10cm is only about
0.06dB/100 feet at 50MHz. It is certainly safe to ignore that,
considering that the loaded Q of the matching system is vastly lower
than the Q of the hairpin line as a resonator.

Cheers,
Tom