Most folks forget this but two things apply here
First we speak of GROUND, but well. GROUNDING is a safety issue, has nothign to do with radiation exactly.. We also speak of "Radials" Now this, is the other half of an antenna. BUT THEN NEED NOT CONNECT TO GROUND!!!!!
Not all antennas need a ground.. For example the popular at low frequencies half wave center fed dipole does not need a ground.. nor does a 1/2 wave end fed.. They do, however, need an impedance matching system.
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