VHF Offset Dipole Array 136-174 MHz - 5 dBd
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.
Features:
- New 4.3-10 high performance connector
- High gain offset (cardioid) pattern. 5 dBd or 9 dBd 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 (-150 dBc) providing low IM and low noise characteristics for optimum performance Options available include:
- All stainless steel 316 grade construction (5 dBd array only)
- Inverted mounting configuration
- OA40-41 may be operated as 2 x 5 dBd arrays by removing external cable harness
- Factory pre-set downtilt of 3° may be specified on OA20 & OA40 VHF series antennas using model no. trailer - T3
- OA20 series can be optionally supplied in all welded 316 grade stainless steel.
- Dimensions vary slightly
Documents:
RFI OA20-41-P Dipole Array - Datasheet
RFI Dipole Array - Installation Guide
