COMMUNICATION ELECTRONIC
315, Vishwa Deep Building, District Center, Janak Puri, New Delhi - 110 058, INDIA
Phone: +91 11 2553 3230    Fax: +91 11 2553 3230    Mobile: +91 9868 128 127
Email: info@starantenna.com    Website: www.starantenna.com


STACKED FOLDED DIPOLE OMNI DIRECTIONAL ANTENNA
SXO-4509 330-512 MHz 9 dBd. (Omni)
12 dBd. (Offset) Gain


General :

The SXO-4509 Stacked Dipole Antenna is a robust antenna with low VSWR and high gain covering 25 MHz. band with any selected centre frequency out of 330-512 MHz. band. It can be mounted on top of an antenna-tower for a Omni directional pattern or side mounted for an offset horizontal radiation pattern.


Design & Construction:

The SXO-4509 Stacked Dipole Antenna consists of Eight folded dipoles stacked vertically. The antenna maintains constant gain and VSWR over its bandwidth of 20 MHz., making it highly suitable for single or multi-frequency systems. The feed ends and cable connections to the dipoles are sealed in epoxy at the end of the boom for protection against weather and imparting rigidity and strength to the dipole structure.


The dipoles are mounted on a tubular boom made of high strength aluminum alloy, which offers a low resistance discharge path. Molded phasing harness cable joints and N-Female antenna termination connector ensures complete waterproofing and many years of maintenance free operation.


Radiation Pattern:

When the EIGHT dipoles are arranged 90 degrees apart around the central mast, 9dBd. Omni directional radiation pattern results. Aligning the EIGHT dipoles collinearly a 12dBd. offset radiation pattern is obtained. The radiation pattern can be changed in the field by use of common hand tools.


Phasing Harness:

Specially designed center fed phasing harness ensures equal and in phase signal distribution to all EIGHT dipoles. All power splitter joints are molded to avoid use of connectors/adapters for waterproofing and to minimize loss.


Shipping:

For ease of handling, the 22.5 feet long central mast for mounting the dipoles is shipped in THREE sections of 7.5 feet each. It can be assembled with simple hand tools in the field with specially designed center coupling supplied with the antenna.


ELECTRICAL DATA
Frequency Range (MHz.)330-512
Gain (dBi.)9 dBd. (Omni)
12 dBd. (Offset)
Bandwidth (MHz.)25
PolarizationVertical
Input Impedance (Ohms.)50
Radiation PatternOmni
VSWR1.5 : 1
RF Power Handling Capacity (Watts)250
Input TerminationN-Female
MECHANICAL DATA
Mounting HWStainless Steel
Weight (Kgs)15
Wind Rating (KMPH)200
Mounting TypeTop Mounting
Overall Length (Meters)7.5
Support Pipe Aluminum - O.D. (mm) 50
Dipoles Aluminum - O.D. (mm)12.5
Shipping Length (Meters)3.75
Mounting Clamp Size
Suitable upto - mm. (Inches)
50 (2)

Please Note:   1. Specifications are subject to change without any notice.
2. Customized in-band and out of band versions are available on request.


VSWR CURVE

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