Abstract
The technique of impedance loading to the antenna element has been applied to an antenna system for portable VHF communication equipment and its practical usefulness has been shown with a brief theoretical analysis and some experimental results. By means of impedance loading to the antenna element, the driving point impedance may be varied so as to make matching feasible, even though the element length is very short, and the effective length may be increased, so that the gain of the loaded antenna system relative to a non-loaded antenna system may be increased. As a practical example, an inductance loaded antenna system has been applied to a 34-54 MHz range portable communication equipment and about 5 dB relative gain increase has been observed.
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