RFS RADIO FREQUENCY SYSTEMS BDH SERIES

GENERAL DESCRIPTION


BROADBAND BICONICAL DIPOLES - BDH SERIES

photo RFS Radio Frequency Systems BDH Series This broadband series of antennas is designed for short to medium range transmitting or receiving applications. Polarization is horizontal and pattern essentially omnidirectional.

These antennas, being broadband, do not require tuning, thus eliminating the need for any form of antenna tuning unit (ATU) with its associated losses. No terminating resistors are employed and so full power is available for radiation.

The broadband feature is ideal for multichannel or frequency agile synthesized HF radio equipment.

The antenna comprises two horizontal conical sections, the elements of which are connected in the centre to a common feed line. Either a 300 ohm balanced line, or a 50 ohm coaxial feeder with a balun option may be used to feed the antenna.

Average power rating of the standard antenna is 10 kW with higher rating to special order.

Baluns are available with average power rating of 1 kW and 10 kW. Higher ratings are also available.

The standard masts (optional) are of lattice steel construction and supported by insulated guys.

An optional stub mast is available as a balun support, or to terminate the 300 ohm balanced feeder.

TECHNICAL SPECIFICATIONS
MODEL
BDH230 BDH330
Frequency Range (MHz) 2 - 30 3 - 30
Gain (Above perfect ground)
8 dBi nominal
Impedance Balanced (ohm) 300 300
Unbalanced (with balun) (ohm) 50 50
Power Rating (with balun option)
1 kW Average (4 kW PEP)
or
10 kW Average (40 kW PEP)
VSWR
Typically 2:1 Max. 2.5:1
Mast Height (m) 21 15
Ground Area (m) 45 x 105 35 x 75
Wind Rating
300 km/hr
Specifications may change without notice

AZIMUTH RADIATION PATTERNS
RFS Radio Frequency Systems BDH Series azimuth radiation patterns


ELEVATION RADIATION PATTERNS
RFS Radio Frequency Systems BDH Series elevation radiation patterns


GAIN
RFS Radio Frequency Systems BDH Series gain


ANTENNA PICTURE
picture RFS Radio Frequency Systems BDH Series


WEIGHT AND DIMENSIONS
Item Packed Weight (kg) Package Size (mm)
BDH 230 antenna 230 950 x 950 x 700
BDH 330 antenna 180 900 x 900 x 600
T1000-530 balun 4 included with antenna
T10K-530 balun 70 920 x 660 x 570
MS3-30/21 Mast (21 m) 550 600 x 1700 x 3040
MS3-30/15 Mast (15 m) 400 600 x 1200 x 3040
SMBDH Stubmast 18 2800 x 100 x 120


ORDERING INFORMATION
Example Model
Input Impedance and Power Always 1 Mast Requirements
BDH230*010 BDH230 * 0 1 0




0 300 / 10 kW (no balun)
0 None



2 50 / 1 kW
3 Mast and Stub
Mast kits



3 50 / 10 kW

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