The project was now taken back to basic principles and calculations were made based largely on information and analysis provided by the RSGB's. Jessop, G6JP. The ground pane will be simulated as is normally the case with a number of metallic elements extending out horizontally from the base of the monopole element and connected to the shield of the coax. The ground plane elements number at least three, but preferable more and in this design there will be six.
Ground plane antenna
Calculators – M0UKD – Amateur Radio Blog
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Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. There are usually four radials, three being a minimum, but you could use up to six. You could cut a little on the large side and trim the antenna for best match at your desired frequency if you have the equipment. For VHF and below, as the elements get bigger, some more structured design is needed.