[amsat-bb] Lindenblad or DCA???

[Joe Spier]

Hans,

Here are links with antenna patterns for the DCA:

https://drive.google.com/file/d/0B0Dkk87YYl-xX2gzLXk5MHZKVU0/view

and the EZ-Lindenblad:

http://www.amsat.org/wordpress/wp-content/uploads/2015/08/An-EZ-Lindenblad-Antenna-for-2-Meters2.pdf

The difference is in the lengths of the "RG-59 (75ohm) phasing harness" 
and dipoles to achieve a 50 ohm impedance at the required frequency.

The angle of the crossbooms affects the directivity of the antenna, in 
the examples given, 60 degrees for a NOAA satellite in a geosynchronous 
orbit and 30 degrees for a LEO orbit.

The only differences I see are the 50 ohm load feedpoint and the 
Lindenblad dipoles are not exactly in the same plane as the DCA.

-73, Joe Spier, K6WAO
President, AMSAT

On 04/01/2018 06:28 AM, Hans (BX2ABT) wrote:
> Double Cross Antenna (DCA)