It elaborate the modelling of the antenna DB-4and and DB-8and in the program MmanaGal and the results were approximated to the two documents published in the post #2 (DB4And-TDS.Pdf – DB8And-TDS.Pdf).
With reference to the dimensions no if they are correct since the image of the post #3 no longer finds , but with the dimensions that mentions in this post but the images of reference that mentions in the post #7 was graficada the antenna.
The model in MmanaGal-Basic admits 512 elements at most by what the reflector of the antenna only graphic the horizontals, pass the model to 4nec2 in which have errors in the number of segments and the radii of the elements treat to correct them but the results that gives varied a lot in function to the number of segments.
Regarding the results (modelling in MmanaGal-Basic) of the DB-4and and DB-8and in both asemeja regarding the Gain in dBi , Azimuth , Elevation and F/B, regarding the SWR is approximated in DB-4and but in DB-8and is different according to the documents published in the post #2.
In reference to the Resistance (R) and the Reactance (jX) no ay reference to if that it is the only that does not convince me of this antenna are the results that obtained in the model that make by what if somebody can say me in that it splits of the dimension is ta badly will correct it.
This is the archive with all the documentation of the antenna DB-4and.
This is the archive with all the documentation of the antenna DB-8and
LibreCAD, Open Source 2D-CAD
MMANA-GAL basic is freeware an antenna-analyzing tool based on the moment method
4nec2 antenna modeler and optimizer by Arie Voors