The Sirio MGA 108-480 PL is a professional-grade, high-integrity VHF/UHF adjustable mobile antenna engineered explicitly to deliver rugged, high-performance signal propagation across an exceptionally wide spectrum of communication bands. Designed with a field-trimmable 1/4 wave (¼) radiating architecture, this premium vehicle whip allows technical staff to precision-tune resonance anywhere between 108 and 480 MHz by following the included frequency cutting table chart. Acting as a heavy-duty, direct upgrade that replaces the legacy MGA 108-550 PL model, this antenna serves as an essential universal infrastructure component for diverse transport networks, municipal service configurations, and B2B radiocommunication hardware depots.
The core radiating element centers around a robust, 2.5 mm diameter straight rod constructed from high-tensile 17/7 PH stainless steel, paired with a chrome-plated brass body assembly. This metallurgical architecture provides elite mechanical resilience against severe highway wind velocities, low-hanging foliage friction, and demanding environmental exposure while maintaining vertical signal linearity. To maximize system impedance pathways and lock down a stable voltage standing wave ratio (VSWR), the antenna yields an active bandwidth greater than 5 MHz at an SWR of less than 2:1 near its lowest tuning limits, handling up to 100W continuous CW transmission power.
For flexible vehicular integration, the base terminates in a high-quality integrated male PL connector (PL-259) designed to drop directly into any standard PL female (SO-239) base or magnetic mount installation layout. When optimizing the antenna for higher UHF deployments, it is highly recommended to pair the whip with a high-quality, low-loss Sirio 500MHz certified base (such as the PM-100PL, HPACU, N-PL, or NE-PL series) to limit dielectric losses. Supplied as a standalone field radiator without base and cable accessories, this turnkey whip is instantly compatible with a massive matrix of global communication standards, extending from aviation air bands up to commercial UHF networks.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Brand | Sirio Antenne |
| Model Designation | MGA 108-480 PL (Replaces MGA 108-550 PL model layout) |
| Factory Part Number | 2431505.05 |
| Antenna Classification Type | VHF / UHF Adjustable Mobile Antenna (1/4 Wave Radiating) |
| Tuning & Frequency Range | 108 to 480 MHz continuous – Adjustable by manual cutting chart calibration |
| Interface Connector Base | PL Male (PL-259 standard type / Matches any PL Female SO239 base connector) |
| Compatible Operational Systems | • Aviation / VHF Air Band Communications • Marine VHF Band & AIS-162MHz Tracking Systems • 2m-HAM, 1.25m-HAM, and 70cm-HAM Radio Bands • Commercial PMR-VHF / PMR-UHF & TETRA (350MHz / 380-395MHz) Fleets • LoRa-433, ISM-169MHz, ORBCOMM M2M, VHF-260MHz, CDMA-450, and LTE-450 Networks |
| Maximum Applicable Power | 100 Watts (100W CW Continuous Power Limit) |
| Active System Impedance | 50 Ohms Nominal |
| Radiation Pattern Profile | Omnidirectional / Linear Vertical Polarization (0 Ref. lambda 1/4 gain threshold) |
| Required Electrical Ground Plane | Metallic vehicle chassis surface installation required |
| Hardware Material Composition | 17/7 PH Stainless Steel whip element (2.5 mm diameter) with a Chrome-Plated Brass body core |
| Color Profile | Silver Metallic Chrome |
| Physical Vertical Dimensions | Length L: Max 77.5 cm untrimmed (Full length calibrated for 108 MHz base deployment) |
| Primary Utility Purpose | Universal fleet vehicle staging, multi-band transceiver routing stabilization, and replacement stock management |
| Package Content | 1x Sirio MGA 108-480 PL Antenna Whip Element (Supplied without separate installation base, cable assembly, or mounts) |
