Notes:The VSWR specifications apply over a frequency ± 200 kHz from the tuning point of the antenna. Where deicing heaters are not used, this tuning point is customarily set 200 kHz above the station operating frequency to provide improved performance under icing conditions. Parasitic elements tend to reduce the VSWR bandwidth of the antenna.
The H series, horizontally polarized antennas will afford broadcasters all the advantages of ERI’s standard internal feed and fully pressured design, plus higher antenna gains and increased omnidirectional pattern characteristics.
Horizontal polarization only allows station owners to choose between circular polarization or increased antenna gain to achieve optimum market penetration. Maximum allowable ERP is maintained while reducing the required transmitter power and minimizing cost.
The H Series antenna can also be combined with the P-300 series (vertical only) antenna to achieve custom horizontal to vertical component ratios. This technique can be useful in reducing the problems associated with multi-path in mountainous terrain. The antenna’s rugged construction and resistance to the effects of radial ice make this combination unbeatable.
Both antennas are constructed of large diameter copper tubing, brass fittings and TIG welding. The antennas operate in a totally pressurized environment with all welded feed point connections. These features contribute to the superior power handling capabilities, excellent bandwidth and durability of the system. The antenna pattern is ± 2 dB when mounted on a Lambda system or on a small diameter antenna pole. Side mounting the antenna on a typical tower structure will affect the azimuth pattern. ERI offers pattern measurements and optimization to improve the circularity of the antenna system.
Note: Except where noted options available at additional cost.
Combine an ERI antenna with an ERI Mounting Structure, Pattern Measurement and Installation. Assure yourself of the best antenna/tower interaction. ERI’s Pattern Measurement service will provide the crucial answers concerning the relationship between the antenna mounting orientation and antenna pattern.
ERI Mounting Sections are designed to achieve optimum antenna performance while reducing weight and wind loads. Only ERI can offer you an antenna/tower/installation package that will achieve your highest expectations in a demanding FM market. Contact Electronics Research for complete electrical and mechanical specifications.
ROTOTILLER® H Series Horizontally Polarized FM Radio Antenna Brochure > Download File
(Type: Brochure; Publication Number: 20090317002_AEN; Language Code: EN; Revision: 01)