Vertical Log-Periodic Antenna 230HF-X, 230H-X
The CD 230H and 230HF series, vertical log-periodic antenna systems have been designed to provide maximum
efficiency and performance for long-haul and sectorial coverage service. These systems are characterized by low angle
elevation plane patterns, high gain and unidirectional radiation patterns, resulting in excellent performance regardless of
changing ionospheric condition. High front-to-back and ffont-to-side ratios provide minimum off path interference.
230H series antennas are smaller in the vertical dimension. This reduced height is structual advantage, and an
operational benefit near airport. Ground screens are not generally required with these 230HF series antenna systems.
On the other hand small ground screen is necessary to support the impedance of the 230H series antennas only for the
lower frequencies cell. However, in instances where exceptionally poor ground conductivity is encountered, it may be
desirable and beneficial to add optional ground screen in order to maintain low take-off angles. The 230H and 230HF
antennas are ideally suited for a wide variety of circuits, ranging in path lengths of from lOOOKm to 6000Km
communication distance.
The 120 degree azimuth coverage of the 230H and 230HF series antenna systems generate numerous applications of these
systems for communications with aircraft and ships at sea or other mobile stations within a broad area. The
comparatively small installation area characteristics of these arrays, in addition to low comparative cost, versus high
performance offer the user numerous advantages in an economical installation.