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            RHOMBIC ANTENNA FOR SHORTWAVE RADIO BROADCASTING

            GENERAL DESCRIPTION


            The rhombic antenna is a diamond-shaped antenna, suspended between 4 masts.

            The 3 parameters of a rhombic antenna are:
            - l : antenna leg length
            - γ : one half of the large interior angle
            - h : antenna height

            All legs of the antenna are the same length, and opposite angles of the diamond are equal.

            The leg lengths of the rhombic must be an integral number of half wavelengths.

            A typical rhombic antenna design would be at a height of between a half and a full wavelength.

            There are 2 versions of the rhombic antenna, the resonant rhombic antenna and the terminated rhombic antenna.

            The resonant rhombic antenna is bidirectional, while the terminated rhombic antenna is unidirectional.

            A considerable amount of power may be lost in the terminating resistance and represents the price that has to be paid for some desirable features such as simplicity of construction, relatively wide bandwith of operation and high directivity gain.
            rhombic antenna


            TYPICAL RADIATION PATTERNS
            Azimuth pattern Elevation pattern
            typical azimuth pattern rhombic antenna typical elevation pattern rhombic antenna


            TYPICAL COVERAGE MAP
            typical coverage map rhombic antenna


            TECHNICAL SPECIFICATIONS
            ELECTRICAL
            Azimuth pattern directional
            Frequency ranges 5-35 MHz
            Gain 9 dBi
            Input impedance 600-800 ohm balanced
            Polarization horizontal
            Power ratings up to 100 kW average
            Specifications may change without notice

            THIS TYPE OF ANTENNA IS AVAILABLE FROM
            Manufacturer Type number Power Level
            Kintronic Laboratories, Inc. HFR Series L M H
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