Two Halve Waves in Phase Antenna - TowerTalk Forum at eHam.net

$\'\'$

$\'\'$

$\'\'$

eHam.net Forum : TowerTalk : Two Halve Waves in Phase Antenna

Forum Help

1-2 of 2 messages

Page 1 of 1

Two Halve Waves in Phase Antenna	Reply
by KA1BVE on November 5, 2005	Mail this to a friend!
Can anyone give me the formula for calculating the length of a 2 Halve Waves in Phase Antenna? Do you just make it twice the length of a dipole for the same frequency, or is it cut using a specific formula all it's own? I'm thinking about building one for 75 meters. Thanks, Terry Martin, KA1BVE

RE: Two Halve Waves in Phase Antenna	Reply
by WB6BYU on November 7, 2005	Mail this to a friend!
Twice the length of a dipole is close enough. Has to be center fed to get the desired pattern. Feedpoint impedance is very high (thousands of ohms for wire antennas) so some sort of matching is normally required. The truth is that the performance won't change significantly for a +/- 10% difference in length, as long as the antenna is properly matched. And adjusting the tuner (or other matching method) will take into account the actual wire length. So there is nothing critical in getting it EXACTLY the right length.

Page 1 of 1

Next Topic: RCS-8V Port Cross Talk
Previous Topic: Steppir Relative Gain / 350Khz to 25Khz in DB?

Email Subscription
You are not subscribed to this topic.

Check our help page for help using Forum, or send questions, comments, or suggestions to the Forum Manager.

$\'\'$