Big Medusa GNSS-IRIDIUM Quadrifilar Helix Configurable Mounting Antenna

Industry-Leading Performance and Robustness for Marine Applications 

2J Antennas is expanding its “Big Medusa'' series by adding the new high performance heavy-duty GNSS-Iridium Quadrifilar Helix (QHA) antenna (2J7B34JBC-C177N-B16J). This industry-leading passive antenna provides superior connection to the GNSS and Iridium network with a high peak gain of 3.2 dBi in low elevation angles while maintaining over 90% efficiency (far above the industry standards). This helical antenna is unique in its simplicity of design and has an extremely low axial ratio below 3 dB that optimizes the circular polarization and delivers superior performance worldwide.

Big Medusa is a simple solution to the problem of non geosynchronous satellite connections where most antenna designs focus on extended range, receiving signals over large arcs, but having null spots directly overhead or at other inopportune locations. Extremely robust and waterproof, this design was developed for marine applications where reliability and mission critical communications are the number one priority during extreme weather conditions. 

Suggested applications include: 

• Iridium voice and data applications
• Marine
• Boats, Yachts and Ships
• Public Safety/ Coast Guard
• Mission Critical Communication
• Law enforcement and public safety
• Satellite Communication

The omnidirectional radiation pattern brings a full spectrum of signal quality within the GPS, Glonass, QZSS, Galileo, BeiDou and IRIDIUM bands and with superior RHCP rejecting multi-path interference and optimizing signal strength making it the ideal choice for marine environments. 

Installation / Environmental

This durable and waterproof antenna is fully IP67 and IP69 certified offering resistance to water and dust making it the number one solution for extreme weather conditions. The robust housing and base are manufactured with commercial grade ASA material. The antenna dimensions for the pole mount  is Ø 96 x H200  and Ø 96 x H 131 for the screw mount configuration. 

The 2J7B34JBC-C177N-B16J offers various configurable anti-rotation mounting options that include pole with maximum Ø 43mm and screw mount with maximum 7mm surface thickness. As with all ground plane independent antennas, this system can be installed on any surface type with minimal restrictions.  

Choosing the right antenna for the right job is important and our highly skilled engineers are available to assist with antenna selection and/or any customization needs. Our products are designed and manufactured without hazardous materials while maintaining full REACH and RoHS compliance.