GMAX900 Series

Surface Mount Antenna + Integrated NMO Mount

The GMAX900 Series combines four LTE/5G/RedCap paths, up to four Wi-Fi 6E/Bluetooth paths, active multi-constellation GNSS, and an integrated NMO mount in one low-profile vehicle antenna platform. The NMO interface supports compatible Comtelco VHF, UHF, and 700/800 MHz LMR antennas, simplifying multi-radio installations for public safety, transit, utility, and fleet vehicles.

Coming Soon Available for Orders in Q4

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Customization: Cable type, cable length, and connectors can be configured for specific installation requirements.

Product Description

The GMAX900 Series is a multiband vehicle antenna platform for fleets that require cellular data, Wi-Fi, positioning, and two-way radio connectivity on the same vehicle. It combines LTE, 5G, RedCap, Wi-Fi 6E, and GNSS antenna functions with a standard NMO mount for a compatible external Comtelco LMR antenna.

The NMO interface allows system designers to select a compatible VHF, UHF, or 700/800 MHz antenna for the installed radio. That flexibility helps the same GMAX900 platform accommodate different two-way radio requirements across public safety, fleet, and transportation vehicles while retaining the integrated broadband, Wi-Fi, and GNSS functions.

A single-hole surface mount simplifies roof installation across fleet deployments. The sleek, low-profile radome and corrosion-resistant metal base are designed for vehicle service, while the external NMO interface allows the LMR antenna to be matched to the radio system. This approach supports multiradio vehicle configurations built around the technologies each deployment requires.

Example Model Configurations:GMAX944

Key Specifications

Feature	Specification
Configuration	4x cellular; up to 4x Wi-Fi 6E/Bluetooth; 1x active GNSS; integrated NMO interface for a compatible external LMR antenna
Technology	5G NR; 4G LTE; 5G RedCap; Wi-Fi 6E; Bluetooth; GNSS; LMR
Frequency	Cellular: 617–960 MHz; 1427–7200 MHz Wi-Fi: 2400–2500 MHz; 4900–7200 MHz GNSS: 1561 MHz; 1575 MHz; 1612 MHz External LMR: VHF, UHF, or 700/800 MHz, depending on the selected NMO antenna
MIMO	Cellular: 4×4 MIMO Wi-Fi: Up to 4×4 MIMO
Gain	Cellular: 2 dBi typical at 617–960 MHz; 4 dBi typical at 1427–7200 MHz Wi-Fi: 2 dBi typical at 2400–2500 MHz; 4 dBi typical at 4900–7200 MHz GNSS antenna: 4 dBiC
Electrical	VSWR: < 2.5:1 over range Impedance: 50 ohms nominal Integrated RF paths: 10 W maximum NMO mount: 100 W maximum
GNSS	Systems: GPS L1; Galileo E1; GLONASS L1; BeiDou B1; QZSS L1C LNA gain: 26 dB ± 3 dB Noise figure: 1.7 dB typical; 2.0 dB maximum Bias: +3 to +5 VDC; 10 mA typical; 20 mA maximum
Cable and Connector	Cellular: 4x RG-316 with SMA plugs Wi-Fi: Up to 4x RG-316 with SMA plugs GNSS: RG-174 with SMA plug NMO: White Teflon cable with custom connector Length: 1 ft (305 mm) pigtails exiting the antenna
NMO Compatibility	Compatible with most Comtelco NMO antennas, excluding 3 in (7.62 cm) and 4.25 in (10.8 cm) diameter models
Mounting	7/8 in (22.22 mm) feed-through; 3/4 in (19 mm) threaded stud; supports surfaces up to 1/2 in (12.7 mm) thick
Dimensions	11.9 in L × 2.67 in W × 2.90 in H (30.2 × 6.8 × 7.3 cm)
Material and Color	Radome: ASA UV-inhibitive plastic Base: Aluminum with foam gasket Colors: Black or white
Operating Temperature	-40°C to +80°C
Compliance	RoHS compliant