S.M4-490-OM
4-stack dipole phased array, Omni, 465-525 MHz
Description
- The S.M4 is an array of phased centre fed folded dipoles mounted on an aluminium mast for PMR / Trunked radio applications.
- Each folded dipole balun assembly and associated harness junction is completely encapsulated in poyurethane resin, totally preventing moisture ingress.
- Former Skymasts brand product.
Specification
| Electrical | |
| Frequency | 465 – 525 MHz |
|---|---|
| Max. Input Power | 250 W |
| 3 dB Beamwidth, H-Plane | Omnidirectional |
| Polarisation | Vertical |
| 3 dB Beamwidth, E-Plane | 21 ° |
| Impedance | 50 Ω |
| Gain | 5.7 dBd (7.9 dBi) |
| VSWR | < 1.5:1 |
| Antistatic Protection | All metal parts DC-grounded (Connector shows a DC-short) |
| Environmental | |
| Ingress Protection | IP68 |
|---|---|
| Mechanical | |
| Elements | 12.7 dia. x 1.6 mm wall aluminium alloy grade 6063T6 |
|---|---|
| Connection(s) | N(f) on RG213/U cable |
| Boom Material | 38.1 mm dia. x 3.2 mm wall aluminium alloy grade 6082T6 |
| Fasteners | Stainless steel grade A2-70 |
| Length | 2300 mm |
| Element Clamps | Diecast Al / Zinc alloy |
| Historic Brand | Skymasts |
| Wind Load | 206 N (160km/h) |
| Weight | 5 kg / 11.02 lb |
| Balun Encapsulant | Polyurethane Resin U-600 |
Ordering Codes
| Model | Product No. |
|---|---|
| 4-stack dipole phased array, Omni, 465-525 MHz | S.M4-490-OM |
PROCOM A/S reserves the right to
amend specifications without prior notice
PROCOM A/S • Smedetoften 12
DK 3600 Frederikssund • Denmark
Generated : 2026-06-28
Version 1