Experimental investigation of the broad-band properties of a continuously loaded resistive monopole

A resistive monopole was designed using thin-film evaporation techniques. Measurements of radiation patterns were made over a 100:1 frequency band and compared to the theory of Wu and King. Current amplitude measurements exhibited a more rapid fall-off at the higher frequencies than the almost linear decay observed at the low frequencies. The input admittance was found to have a relatively gradual increase with frequency and reached a final value of approximately (
16 + j4
) m
\Omega
M
^-1
The efficiency of the antenna was observed to increase markedly with increase in frequency.