1300 000 734

VHF Offset Dipole Array 136-174MHz - 9 dBd


These high performance VHF dipole offset arrays are ideal for use when a cardioid pattern is required. The arrays feature high gain, low noise performance and enhanced null fill coverage with typical cardioid coverage characteristics.

Availability: In stock

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OA40-41 Features:

OA series arrays have an almost full 180° horizontal beamwidth. This eliminates the possibility of fading at the extremities of the target coverage area. Antenna gain is approximately unity at the rear of the antenna.

As would be expected from a cardioid array, the vertical beamwidth is slightly greater than its BA (omnidirectional) or EA (elliptical) pattern counterparts.

OA series arrays feature the same solid construction as the BA and EA Series. The folded dipoles utilise an internal phasing harness in stable, PTFE based double-screened coaxial cable with PE jacket for optimum weatherproofing. The offset arrays incorporate extensive side lobe suppression, null fill, and power input level of 750 watts continuous.

With all welded construction and superior internal harness construction these antennas provide not only excellent pattern characteristics but also high levels of intermodulation and noise suppression. The entire array rests at ground potential and offers the ultimate in lightning resistant antennas.

• High gain offset (cardioid) pattern. 5dBd or 9dBd versions available
• Operate over entire 136-174 MHz VHF band without tuning or adjustment
• Modular mix and match format allows future-proofing installations
• 3° downtilt option available
• Inverted mounting version available
• Industry leading PIM ratings (-150dBc) providing low IM and low noise characteristics for optimum performance

Options available include:
•All stainless steel 316 grade construction (5dBd array only)
•Inverted mounting configuration
•OA40-41 may be operated as 2 x 5dBd arrays by removing external cable harness

(1) Factory pre-set downtilt of 3° may be specified on OA40 series antennas using model no. trailer - T3
(2) OA20 series can be optionally supplied in all welded 316 grade stainless steel. Dimensions vary slightly
(3) Connector termination option available of 7/16 DIN female connector using model no. trailer -DIN
Nominal Gain dBd 9
Frequency MHz 136 to 174MHz
Tunable Bandwidth Full. No tuning required
VSWR <1.5:1
Downtilt 0 Std, -3°.
Polarisation Vertical
Vertical Beamwidth 17°
Horizontal Beamwidth 176°
Power W 750
Passive IM 3rd Order (2x20W) dBc <-150
Construction All welded aluminium with alodined finish.
Length mm 6300
Weight (kg) 29
Termination N female with 0.5m 9142 cable tail.
Mounting Area 500mm x 76mm diam. aluminium

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