TW4421 Single Band GNSS Antenna 

The TW4421 employs Calian's patented Accutenna® technology covering the GPS-L1, GLONASS-G1, and SBAS (WAAS, EGNOS & MSAS) frequency band (1575 to 1606 MHz). The TW4421 features a novel 25 mm (diameter) dual-feed wideband patch element that provides a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth.

It provides truly circular response over its entire bandwidth thereby producing superior multipath signal rejection. It is especially suitable for high accuracy applications while providing high out-of-band signal rejection. The two feeds from the patch element are summed in a 90° Hybrid then input to a first stage low-noise amplifier (LNA), followed by a mid-section SAW and a second low noise gain stage.

The TW4421 is the smallest dual-feed, high performance antenna available. It is housed in a compact IP68 magnetic or adhesive mount enclosure. It is available with a wide range of cable and connector options.

The antenna can be ordered without the magnet. In such cases, the magnet is replaced with a plastic plug to provide a smooth under surface, with the option of ordering it with or without 1.1 mm thick doublesided VHB tape on the bottom. 
 

• Dual-feed patch element
• Axial ratio: 2 dB max. (GPS & GLONASS)
• Low noise LNA: 1 dB
• High-rejection mid-section SAW filter
• High-gain LNA: 28 dB typ.
• Wide voltage input range: 2.5 to 16 VDC
• IP68 weather proof housing
• Low Power (12 mA typ. current consumption)

Applications:

• Cost Sensitive Mission Critical Positioning
• Law enforcement and public safety
• Covert surveillance
• Fleet management and asset tracking

Antenna: