Coaxially fed dipole antenna

Claim 1

An antenna system comprising: a first longitudinally extended dipole assembly including a first tubular dipole element, said assembly having a capacitive inductive voltage induced therein, said first dipole assembly including a first center conductor element having an electrical feed point on a first end thereof for introducing electrical power therethrough, said first center conductor element extending throughout said longitudinal extension of said first dipole assembly for exiting at an end section thereof, a second longitudinally extended dipole assembly including a second tubular dipole element, said second dipole assembly substantially axially aligned with and positionally displaced from said first dipole assembly, said second dipole assembly including a second center conductor element contained therein, said second center conductor extending throughout said second longitudinal extension of said second dipole assembly, said second center conductor element being electrically decoupled from said first and second dipole assemblies, said first and second center conductor elements being positionally aligned wherein said inductive voltage in each of said center conductor elements is of substantially equal magnitude and out of phase each with respect to the other, and, means for electrically coupling said first dipole assembly to said second dipole assembly, said capacitive inductive voltage being substantially equalized between said first dipole assembly and said second dipole assembly for voltage balancing said first and second dipole assemblies each with respect to the other, said coupling means including a center link coil assembly coupled to a second end of said first center conductor element and a loading coil assembly coupled to said first and second tubular dipole elements, said loading coil assembly being inductively coupled to said center link coil assembly and including a primary loading coil element coupled to said first tubular element and an adjustable loading coil assembly coupled in series relation to said primary loading coil element and said second tubular dipole element for adjusting said antenna system to a predetermined resonance frequency.