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D230 Series
Delta Antenna Series: D, DC & DCD 2-30MHz

Rev : 01 | Rev date : 06 Jan 2022

D, DC and DCD Series Antennas 
Delta antennas are designed for coverage over short to medium distances and exhibit essentially an omni-directional, high angle radiation pattern.
They are available with or without a support mast and are supplied complete with the appropriate balun and termination.
Model D230
With this antenna model, antenna elements are fed from a central balun transformer, through horizontal feed “wings”, to the bottom of the oblique elements. The input connector is N-Type 50 ohm.
Model DC230 
Although these omni-directional deltas are more expensive than Model D antennas, the lack of overground wings offers advantages for personnel safety and installation on uneven or constrained sites.
With this antenna model, the horizontal feed “wings” are replaced by buried coaxial cables and a suitable feed-point transformer at the base of each oblique element. A central broadband splitter, mounted at the base of the mast, distributes the signal to each of the transformers. The input connector is N-Type 50 ohm.
Model DCD230
This antenna system consists of two model DC antennas attached to one mast and operated as separate transmit antennas. Isolation between the two is 30dB. The DCD antenna can also be configured as an elliptically polarized antenna with either a single input for elliptical polarisation or with two inputs for dual elliptical polarisation.

FEATURES / BENEFITS

  • Short to medium range operation
  • Suitable for NVIS operation
  • Broadband– no tuning units required
  • Suitable for frequency-agile transmission
  • Available as a dual input system with two isolated RF inputs (Model DC-D) that can be configured to radiate two horizontally polarized signals or two elliptically polarized signals.
     


Model D230 shown

Technical features

Electrical Specifications

ModelD230DC230DCD230
Frequency Range MHz2-30
Gain dBiRefer chart
PolarizationHorizontal or
Elliptical
Elevation Radiation PatternRefer plots
Azimuth Radiation PatternEssentially Omni-directional, refer plots
VSWR<2.0:1
Maximum Power Rating kW0.25 average, 1.0 PEP
or
1 average, 4.0 PEP
Input ConnectorN-type socket
Impedance Ω50

Mechanical Specifications

Mast Height m (ft)22 (72.18)22 (72.18)22 (72.18)
Antenna Width m (ft)58 (190.29)44 (144.36)44 (144.36)
Antenna Depth m(ft)1.5 (4.9)1.5 (4.9)44 (144.36)
Mast Guy Radius m (ft)14.5 (47.57)
Wind Survival Rating (No ice) km/h (mph)230kmh (143mph) *See Note 1 to 3

Material

Material - RadiatorsMarine grade stainless steel

PACKAGING INFORMATION

Shipping informationPacked weight, kg (lb)Packed size, cm (in)
D23035 (77) excludes mast and balun90 x 65 x 30 (35-7/16" x 25- 19/32" x 11-13/16") excludes mast and balun
DC23040 (88) excludes mast and balun90 x 65 x 30 (35-7/16" x 25-19/32" x 11-13/16") excludes mast and balun
DCD23070 (154) excludes mast and balun100 x 70 x 70 (39-3/8" x 27- 1/2" x 27-1/2") excludes mast and balun

External Document Links

Notes

Wind ratings are calculated to the following Australian standards:
1. AS1664-1975 - SAA Aluminum Structures Code (which gives a safety factor of 65% to material yield)
2.    AS1250-1981 - SAA Steel Structures Code (which gives a safety factor of 65% to material yield)
3. AS1170-1981 - Part 2 - SAA Loading Code, Wind Forces