A Close Look at the Terminated Folded Dipole Antenna

摘要

A much later EZNEC assessment of the horizontal configuration by ARRL Technical Advisor Jack Beirose, VE2CV, was validated by some comparison testing to a half wave dipole on a number of frequencies.2 1 chose to make a comparison to a nonresonant dipole of the same length as the TFD, since I thought it would be a fairer comparison. In the TFD, at the low end of the range, EZNEC predicts that the resistor absorbs slightly more than 90% of the applied power, closely agreeing with Table I . Thus a 100 W station running RTTY would need a termination rated at 90 W. SSB and CW stations can likely use a termination with 25 W dissipation, if they don't tune for long - but what's to tune here?