To: | <topband@contesting.com> |
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Subject: | Topband: Tee Antenna dimensioning |
From: | "Richard Fry" <rfry@adams.net> |
Reply-to: | Richard Fry <rfry@adams.net> |
Date: | Sun, 18 Oct 2015 13:38:08 -0500 |
List-post: | <topband@contesting.com">mailto:topband@contesting.com> |
A NEC4.2 model of a tee using a 60-ft tall vertical conductor shows 29 -j
0.04 ohms at 1.9 MHz when connected at the top to the center of a horizontal
conductor 89 feet in length.
The tee was base-driven against 16 x 33-foot radials buried 4 inches in 5 mS/m, d.c. 13 earth. Conductor ODs are 3 mm. Feedpoint SWR is less than 1.5:1 over a 60 kHz bandwidth (referenced to 29 ohms). Maximum far-field antenna system gain is -0.73 dBi @ 24 degrees elevation, excluding any matching losses. _________________ Topband Reflector Archives - http://www.contesting.com/_topband |
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