ALYX ANTENNA GUIDE
FIXED VERTICAL LOG-PERIODIC ANTENNA FOR SHORTWAVE RADIO BROADCASTING


GENERAL DESCRIPTION


photo vertical log-periodic antenna The vertically polarized log-periodic dipole antenna has a narrow, low-angle elevation plane pattern, designed for medium and long range communications.

The antenna should be used with a ground mat for improved low angle performance.

The vertical log-periodic antenna is characterised by a radiation pattern that is essentially constant at all frequencies.

The antenna comprises a curtain of dipoles insulated into sections and suspended from a support mast.

The vertical log-periodic antenna is designed for direct connection to a 300 ohm balanced open wire feeder or a 50 ohm coaxial line with a balun transformer.

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


TYPICAL COVERAGE MAP
typical coverage map vertical log-periodic antenna


TECHNICAL SPECIFICATIONS
ELECTRICAL
Azimuth pattern directional
Frequency ranges 2-30 / 4-30 / 6-30 MHz
Gain 9-12 dBi
Input impedance 50 ohm unbalanced or 300 ohm balanced
Polarization vertical
Power ratings 1 / 10 / 25 / 50 kW average
VSWR 2.0 : 1 or less
DIMENSIONS
Length 74-175 m (242-575 ft)
Width 38-116 m (125-381 ft)
Height 25-82 m (82-269 ft)
Specifications may change without notice

THIS TYPE OF ANTENNA IS AVAILABLE FROM
Manufacturer Type number Power Level
ASC Signal 1703 L M
2726 L M
Antenna Products Corporation LMV-0200/2900 L M
LPV-1200/1600 L M
Kintronic Laboratories, Inc. LPA-V Series
M H
RFS Radio Frequency Systems VLP Series
M
TCI Model 503 L M
Model 507 L M
Model 513 L M
Transradio SenderSysteme Berlin VLP 0636

H


ABBREVIATIONS

Abbreviation Explanation
Power Level L low 1-5 kW
M medium 10-50 kW
H high 100-500 kW