Calian® Introduces the HC997EXF Extended-Filter Embedded Full-Band GNSS Helical Antenna

December 7, 2021

Calian® Introduces the HC997EXF Extended-Filter Embedded Full-Band GNSS Helical Antenna

(Ottawa, Ontario, Canada, December 7, 2021) Calian® Wireless Inc. is excited to announce the triple-band low-profile HC997EXF to its industry-leading line of embedded helical GNSS antennas.

The triple-band GNSS HC997EXF embedded helical antenna is designed for precise positioning, covering the GPS/QZSS-L1/L2/L5, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b, BeiDou-B1/B2/B2a, and NavIC-L5 frequency bands, including the satellite-based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN(India)], as well as L-band correction services.


The HC997EXF low-profile helical antenna is packaged in a very light (11 g) and compact form factor (60 mm wide and 25 mm tall). Its precision-tuned, high-accuracy helical element provides an excellent axial ratio and operates without a ground plane. These features make the HC997EXF ideal for lightweight unmanned aerial vehicle (UAV) navigation and a wide variety of precision applications.

eXtended Filtering (XF) enables the HC997EXF antenna to mitigate new and existing radio frequency bands that interfere with GNSS signals. For example, in North America, the planned Ligado service, which will broadcast in the frequency range of 1526 to 1536 MHz, could affect GNSS antennas that receive space-based L-band correction service signals (1539 – 1559 MHz).  Similarly, LTE signals or their harmonics, such as the new LTE bands in Europe [Band 32 (1452 – 1496 MHz)] and Japan [Bands 11 and 21 (1476 – 1511 MHz)], have affected GNSS antennas and receivers. Lastly, the Inmarsat satellite communication uplink (1626.5 – 1660.5 MHz), commonly used on maritime vessels, can also affect nearby GNSS antennas.

The HC997EXF antenna base has a flying lead and a variety of connectors. To facilitate the installation, Calian provides an optional embedded helical mounting ring, which traps the outer edge of the antenna circuit board to the host circuit board or any flat surface. Calian provides support for installation, integration, and optimization of embedded helical antennas to ensure optimal antenna performance.

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