SHORT DIPOLE WITH CAPACITIEVE HAT

INTRODUCTION

  

My current inverted V antenna, which required a vertical extension on one side to make both halves equal in length, is therefore not electrically symmetrical on all bands. After all, the capacitance relative to earth is not equal.
In addition, the angle of the inverted V is approximately 90º, which is the minimum angle for this type of antenna. If this angle is smaller, the antenna does not become a dipole but behaves like one wire with a large diameter.
Furthermore, the average height of my inverted V antenna is lower than that of a stretched dipole.
So it was decided to make a shorter antenna to increase that height.
With such a short antenna, the effectiveness can be increased by adding a capacitance (capacitive hat) to the end. 

HOW THE SYSTEM WORKS

Unlike a dipole, the trick with this system is that the current is not zero at the end of the 10 m segment.
The antenna therefore radiates more than a "bare" dipole.
The currents in the hats are opposite and largely cancel each other out, making them virtually ineffective.
It is a well-known antenna, but not very common among us radio amateurs, while it is worth trying. 

CONSTRUCTION

For me the construction was simple because here were two incomplete Cushcraft R5 antennas with their hats still intact.
They consist of four pointed stainless steel spokes of 120 cm.
See also: https://pa0fri.home.xs4all.nl/Ant/GPA-30%20@%20R6000%20conversie/GPA-30%20@%20R6000%20conversion.htm
The following images should be sufficient to give you an impression of how things are done here.
All in all, it appears in practice that it is a good alternative for people who have to work with a (too) short antenna.

De linker en rechter kant van de korte omgekeerde V antenne.