ROTATABLE LOG-PERIODIC ANTENNA FOR SHORTWAVE RADIO BROADCASTING

GENERAL DESCRIPTION


The rotatable log-periodic antenna is a broadband horizontally polarized antenna, designed for medium and long range communications.

Thanks to a rotator, any desired direction can be chosen.

The radiation pattern is generally consistent over the entire frequency range of the antenna, however the pattern can be tailored to suit requirements.

The radiating structure consists of a series of dipoles, mounted on a horizontal boom. The dipoles are fed along the center of the structure.

The supporting structure of the antenna can either be a self-supporting tower or a guyed mast.
rotatable log-periodic antenna


TYPICAL RADIATION PATTERNS
Azimuth pattern Elevation pattern
typical azimuth pattern rotatable log-periodic antenna typical elevation pattern rotatable log-periodic antenna


TYPICAL COVERAGE MAP
typical coverage map rotatable log-periodic antenna


TECHNICAL SPECIFICATIONS
ELECTRICAL
Azimuth pattern directional
Frequency ranges 2-30 / 4-30 / 6-30 MHz
Gain 5-13 dBi
Input impedance 50 ohm unbalanced or 300 ohm balanced
Polarization horizontal
Power ratings 1 / 5 / 10 / 25 / 50 / 100 kW average
Specifications may change without notice

THIS TYPE OF ANTENNA IS AVAILABLE FROM
Manufacturer Type number Power Level
ASC Signal 2731/2004 L M
Antenna Products Corporation LPH-1 L M
LPH-9/30/24
M
LPH-27
M
LPH-89
M
RFS Radio Frequency Systems HLO Series
M
TCI Model 521 L M H
Transradio SenderSysteme Berlin AHL 0421

H