TW1721/TW1722 Wideband GNSS Antennas

Calian's TW1721 and TW1722 are compact, wideband GNSS antennas employing patented Accutenna® technology. These antennas provide accurate reception for all upper L-band GPS, GLONASS, Beidou, and Galileo signals (L1, G1, B1, B1 BOC, B1-2, E1) and associated augmentation signals (WAAS, EGNOS, and MSAS).

The TW1721 and TW1722 feature a novel 25 mm dual-feed wideband patch element that, in sharp contrast with its competitors, provides a truly circularly polarized response with a typical axial ratio of less than 2 dB over the full bandwidth. This provides a more linear carrier phase response and substantially improved multipath rejection for higher precision applications. The built-in 35 mm circular ground plane should ideally be augmented with a local system ground plane or reflecting surface (DC connection not required).

The TW1722 is the pre-filtered version of the TW1721. The pre-filter provides protection from strong near frequency or harmonic signals, such as LTE. OEM antennas are easily detuned by the local environment. Calian offers custom tuning services for optimized integration into OEM end-user modules.