ADJUSTABLE ANTENNA ARRANGEMENT FOR A PORTABLE RADIO

摘要

ADJUSTABLE ANTENNA ARRANGEMENT FOR A PORTABLE RADIO An extendable half-wave dipole is capacitively coupled to a driven resonant helical antenna for use as on a handheld, two-way portable radio, the helix being end fed. The dipole may be mounted adjacent to or collinear with the axis of the helix. The collinear mounting requires non-conductive portions on each end of the dipole. Optimum dimensional and performance characteristics are available without switching.