What is the effect of adding a terminating resistor to a rhombic or long-wire antenna?
It reflects the standing waves on the antenna elements back to the transmitter
It changes the radiation pattern from bidirectional to unidirectional✓Bonne réponse
It changes the radiation pattern from horizontal to vertical polarization
It decreases the ground loss
Explication
Without a termination, energy reaching the far end of a rhombic or long wire reflects and travels back, so the antenna responds equally in two opposite directions. A resistor of the right value absorbs that energy instead of reflecting it, leaving only the forward traveling wave and a unidirectional pattern.