Abstract: An antenna with loading coil is described, which has an especially high Q for longer range communication. The inside of the coil is left empty of solid material while a frame that surrounds the coil is of dielectric material. The wire that forms the coil is constructed so upper and lower wire portions that extend radially inwardly from the ends of the coil, extend at inclines much greater than the wind angle of the coil, and hold metallic coupling slugs away from the opposite ends of the coil. Strips of silicone extend between adjacent coil turns and are mounted on the coil, to minimize vibrations while using a minimum of dielectric material close to the coil. By combining these improvements into a practical commercial coil, applicant has raised the coil Q by 29.5% from the Q of his previous antenna which had the highest Q of citizen band antennas on the market.

Abstract: An antenna includes a dipole (20) with upper and lower elongated conductors (22, 24) and a feedline (40) for carrying radio frequency currents to the dipole by connecting the feedline to the lower end (30) of the upper conductor and to the upper end (32) of the lower conductor, which produces maximum gain. A spacer (50) spaces the center of the feedline by a distance (A) of about 3 centimeters from the center of the lower conductor, to produce minimum losses while providing a compact antenna. A toroidal ferrite core (110) lies at the bottom of the lower conductor and the feedline is in the form of a wire pair that is wrapped a plurality of times about the ferrite core to prevent signals radiated by the lower conductor and picked up by the feedline, from passing to the radio. A tuning member (150) of electrically conductive material can be slid along the spacer to tune the antenna without changing its height (B).

Abstract: A base loaded antenna is provided, which securely holds the inductive loading coil of the antenna while minimizing capacitive coupling of adjacent coil turns. A coil support has fins with grooves that hold the coil, so most of the space between adjacent coil turns contains only air. A cover surrounds the coil, and the coil support is loaded in tension while the cover is loaded in corresponding compression. A base on which the coil support and cover are mounted, is held to a vehicle sheet metal body by a star plate that lies on the underside of the sheet metal. The star plate has bent-up peripheral portions that "dig" into the sheet metal to make an electrical ground connection therewith, and a flat middle for making electrical and mechanical connections to outer coaxial conductors.