The 427x and 428x colinear antennas target sites where pattern stability, low PIM, and high PIP tolerance are mandatory. Both families use a centre-fed dipole array with a controlled feed network. This keeps the radiation pattern consistent across the operating band and prevents distortion when electrical tilt is applied.
Engineers working with high-density carriers, trunked systems, or high-power LTE sites will see the benefit immediately: predictable performance under load.
PIM and PIP Performance
Low PIM (–153 dBc)
- Reduces intermodulation products at the antenna level.
- Protects adjacent channels.
- Improves uplink SNR in multi-site networks.
- Supports dense sectorization without unwanted mixing.
High PIP (25 kW)
- Handles power peaks from high PAPR waveforms.
- Reduces risk of arcing in the feed system.
- Maintains stable RF characteristics during instantaneous load spikes.
- Extends service life in multi-carrier deployments.
These values make the antennas suitable for modern digital waveforms used in LTE and public safety networks.
427x Series (870–960 MHz)
Antenna for upper-UHF LTE/GSM systems requiring high gain and mechanical durability.
Electrical
- Gain: 11.5 dBd (13.7 dBi)
- Beamwidth: 4° ±1° (E-plane)
- VSWR: <1.5:1
- Omni deviation: <±1 dB
- Max input power: 600 W
- PIP: 25 kW
- Impedance: 50 Ω
- PIM: –153 dBc
- Vertical polarization
Mechanical
- Length: 4570 mm
- Weight: 27.2 kg
- Wind load: 870 N at 160 km/h
- Survival wind speed: 240 km/h
- IP56 rating
- LM25 aluminium base, 128 mm GRP radome, brass elements
- DC grounded structure
- Optional lightning finial (200 kA rating)
Tilt options: 0°–5° in 7/16 DIN(f) or 4.3/10 DIN(f).
Click here for datasheet: 427x.11-915-Tx
428x Series (740–870 MHz)
Designed for lower-UHF LTE/GSM with engineered null-fill for improved near-field coverage.
Electrical
- Gain: 11 dBd (13.2 dBi)
- Beamwidth: 3° ±1° (E-plane)
- Lower sidelobe control: 25% null fill
- VSWR: <1.5:1
- Omni deviation: <±1 dB
- Max input power: 600 W
- PIP: 25 kW
- PIM: –153 dBc
- Impedance: 50 Ω
- Vertical polarization
Mechanical
- Length: 5244 mm
- Weight: 32 kg
- Wind load: 946 N at 160 km/h
- Survival wind speed: 240 km/h
- IP56 rating
- LM25 aluminium base, GRP shroud, brass radiators
- DC grounded
Tilt options: 0°–5° in 7/16 DIN(f) or 4.3/10 DIN(f).
Click here for datasheet: 428x.11-780-Tx
Notes
- Centre-fed architecture improves pattern symmetry across the full band.
- Wide-band feed design allows stable tilt adjustment without E-plane distortion.
- Low PIM supports multi-operator or multi-carrier shared infrastructure.
- High PIP aligns with modern OFDM-based systems where peak-to-average ratios continue to rise.
- IP56 and 240 km/h ratings make both families suitable for exposed tower sites.
- Mechanical interfaces (190.5 mm PCD flanged base) simplify integration with standard mounting hardware.
