Abstract: 12 and 17 meter adapter assemblies for a vertical antenna which includes an air wound inductance coil and winged capacitor straps. The adapter assemblies include a coil and wing capacitor straps at one end of the coil where the one end of each coil connects to the antenna and the other end of each coil, including the wing capacitor straps, mechanically connects to the antenna and is electrically insulated from the antenna.

Abstract: A ten-band vertical antenna includes completely automatic band switching for the amateur radio frequencies of eighty, seventy-five meters, forty meters, thirty meters, twenty meters, seventeen meters, fifteen meters, twelve meters, ten meters and six meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The seventy-five-meter, a switchable eighty-meter, and forty-meter inductor-capacitors are in parallel, while the thirty-meter inductor-capacitor is in series with a portion of the forty-meter circuit thereby providing inductive reactance for operation on eighty meters, seventy-five meters, forty meters, and thirty meters with a series inductor-capacitor connected between an upper vertical radiating element and the forty-meter inductor while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen and ten meters.

Abstract: Antenna for operation on a plurality of frequencies, the antenna including apex fed opposing swept elements and a plurality of stubs parallel to a central element, a plurality of capacitors connected between one end of the central element and ends of the stubs, and a coaxial cable connected to the opposing swept elements. Each swept element has a triangular configuration with a central element running from the apex to the base of the triangle at a perpendicular intersection. Plural matching stubs connect from the coaxial fed apex and parallel along the central tube, secured at the other end with clamps or capacitors. Ceramic doorknob capacitors connect between the coaxial fed apex and a free end of the first stub and between the first and second stub ends. A hairpin coil can be utilized between the apex fed and the first capacitor. A matching end can connect across the feed point at a common matching stub point for the swept elements.

Abstract: An eight-band vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of eighty/seventy-five meters, forty meters, thirty meters, twenty meters, seventeen meters, fifteen meters, twelve and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The eighty-meter and forty-meter inductor-capacitors are in parallel while the thirty-meter inductor-capacitor is in series with a portion of the forty-meter circuit providing inductive reactance for operation on eighty/seventy-five meters, forty meters, and thirty meters with a series inductor-capacitor connected between an upper vertical radiating element and the forty-meter inductor while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen and ten meters.

Abstract: Antenna for operation on a plurality of frequencies, the antenna including apex fed opposing swept elements and a plurality of stubs parallel to a central element, a plurality of capacitors connected between one end of the central element and ends of the stubs, and a coaxial cable connected to the opposing swept elements. Each swept element is of a triangular configuration with a central element running from the apex to the base of the triangle at a substantially perpendicular intersection. A plurality of matching stubs connect from the coaxial fed apex and substantially parallel along the central tube, secured at the other end with clamps or capacitors. Ceramic doorknob capacitors connect between the coaxial fed apex and a free end of the first stub and between the first and second stub ends. A hairpin coil can be utilized between the apex feed and the first capacitor, providing required circuit Q. A matching end can connect across the feedpoint at a common matching stub point for the swept elements.

Abstract: Plurality of inductor-capacitor parallel L-C circuits for vertical antennas and beam array antennas where each antenna includes a plurality of circuits, each circuit including an inductor-capacitor tube-coil positioned adjacent a trap of said antenna, the tube-coil assembly including an outer metallic tube, a dielectric insulator telescoped therein, an inner metallic tube, a coil connected between an outer and inner tube about the insulator tube, and a clamp assembly including bolts and wing nuts for clamping the inductor-capacitor coil arrangement substantially parallel and upward to the trap of the antenna. The pluralities of inductor-capacitor tube coils are particularly useful with vertical antennas utilizing traps and directional array antennas utilizing traps.

Abstract: A six-band vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of eighty/seventy-five meters, forty meters, thirty meters, twenty meters, fifteen meters, and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The eighty-meter and forty-meter inductor-capacitors are in parallel while the thirty-meter inductor-capacitor is in series with a portion of the forty-meter circuit providing inductive reactance for operation on eighty-seventy-five meters, forty meters, and thirty meters with a series inductor capacitor connected between an upper vertical radiating element and the forty-meter inductor while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen, and ten meters.

Abstract: A vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of, eighty/seventy-five meters, forty meters, twenty meters, fifteen meters, and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The eighty-meter and forty-meter resonator capacitor sections provide inductive reactance for operation on eighty/seventy five meters and forty meters while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen, and ten meters. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is decoupled above an end of a fifteen-meter quarter-wave decoupling stub in a first embodiment. The entire radiator length of the vertical antenna is active on all frequencies in a second embodiment.

Abstract: A vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of one hundred and sixty meters, eighty-seventyfive meters, forty meters, twenty meters, fifteen meters, and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which permits direct coaxial cable transmission line feed. The eighty meter and forty meter resonator capacitor sections provide inductive reactance for operation on eighty-seventyfive meters and forty meters while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen, and ten meters. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is trapped out by a fifteen meter decoupling trap.

Abstract: Vertical antenna including a vertical radiator having a height of three-half wavelengths, a cancellation stub electrically connected to the vertical radiator three-quarters wavelength upward from a feed point at the base of the vertical radiator and extending downwardly one-quarter wavelength and upwardly one-half wavelength from the electrical connecting point of the vertical radiator, an insulation member mounted in a mounting post and supporting the base of the vertical radiator, quarter wavelength radials extending outwardly in the same plane and at right angles to the vertical radiator from the mounting post, and a transmission line connected between the feed point at the base of the vertical radiator and the radials. The gain of the vertical antenna is theoretically 3.2 db over a half wavelength dipole antenna. The vertical antenna is particularly lended to operation in the VHF spectrum and above.