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            HORIZONTAL DIPOLE ANTENNA FOR SHORTWAVE RADIO BROADCASTING

            GENERAL DESCRIPTION


            The horizontal dipole antenna is very simple to construct and an effective performer.

            A center-fed half-wave dipole consists of a straight wire, one-half wavelength long and fed in the center.

            A half-wave dipole is just one form a dipole can take. Actually, a center-fed dipole can be any length electrically, as long as it is configured in a symmetrical fashion with two equal-length legs.

            The horizontal dipole antenna is a directional antenna.

            In general, the greater the length of a center-fed antenna, in terms of wavelength, the larger the number of lobes into which the pattern splits. A feature of all such patterns is the fact that the main lobe - the one that gives the largest field strength at a given distance - always is the one that makes the smallest angle with the antenna wire. Furthermore, this angle becomes smaller as the length of the antenna is increased.

            The polarization of a horizontal dipole antenna is horizontal.
            horizontal dipole antenna


            TYPICAL RADIATION PATTERNS
            Azimuth pattern Elevation pattern
            typical azimuth pattern horizontal dipole antenna typical elevation pattern horizontal dipole antenna


            TYPICAL COVERAGE MAP
            typical coverage map horizontal dipole antenna


            TECHNICAL SPECIFICATIONS
            ELECTRICAL
            Azimuth pattern directional
            Frequency ranges 2-30 / 3-30 MHz
            Gain 2-4 dBi
            Input impedance 50 ohm unbalanced
            Polarization horizontal
            Power ratings 1 / 2.5 / 5 kW average
            Specifications may change without notice

            THIS TYPE OF ANTENNA IS AVAILABLE FROM
            Manufacturer Type number Power Level
            Ampegon Antenna Systems RDA

            H
            Kintronic Laboratories, Inc. FDP Series L M H
            RFS Radio Frequency Systems ADH Series L

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